./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/sll-queue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-queue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af4a0e4f738e916feae01fb2c2f056f4ba7834b8a7b8d69765614c5417c16c63 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:51:22,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:51:22,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:51:22,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:51:22,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:51:22,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:51:22,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:51:22,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:51:22,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:51:22,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:51:22,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:51:22,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:51:22,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:51:22,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:51:22,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:51:22,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:51:22,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:51:22,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:51:22,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:51:22,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:51:22,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:51:22,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:51:22,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:51:22,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:51:22,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:51:22,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:51:22,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:51:22,663 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:51:22,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:51:22,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:51:22,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:51:22,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:51:22,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:51:22,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:51:22,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:51:22,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:51:22,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:51:22,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:51:22,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:51:22,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:51:22,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:51:22,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-11-20 22:51:22,704 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:51:22,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:51:22,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:51:22,706 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:51:22,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:51:22,707 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:51:22,708 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:51:22,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:51:22,708 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:51:22,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:51:22,709 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:51:22,709 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:51:22,709 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:51:22,709 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:51:22,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:51:22,710 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:51:22,710 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:51:22,710 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:51:22,711 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:51:22,711 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:51:22,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:51:22,712 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:51:22,712 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:51:22,712 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:51:22,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:51:22,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:51:22,713 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:51:22,713 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:51:22,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:51:22,714 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:51:22,714 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:51:22,714 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:51:22,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:51:22,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:51:22,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:22,715 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:51:22,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:51:22,716 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:51:22,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:51:22,716 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:51:22,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:51:22,717 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af4a0e4f738e916feae01fb2c2f056f4ba7834b8a7b8d69765614c5417c16c63 [2021-11-20 22:51:23,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:51:23,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:51:23,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:51:23,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:51:23,042 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:51:23,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/forester-heap/sll-queue-2.i [2021-11-20 22:51:23,116 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data/f6a3e5292/02df5e01f3d0405697ad0ee03935f438/FLAG8afc9eea9 [2021-11-20 22:51:23,641 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:51:23,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i [2021-11-20 22:51:23,675 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data/f6a3e5292/02df5e01f3d0405697ad0ee03935f438/FLAG8afc9eea9 [2021-11-20 22:51:23,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data/f6a3e5292/02df5e01f3d0405697ad0ee03935f438 [2021-11-20 22:51:23,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:51:23,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:51:23,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:23,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:51:23,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:51:23,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:23" (1/1) ... [2021-11-20 22:51:23,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d99bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:23, skipping insertion in model container [2021-11-20 22:51:23,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:51:23" (1/1) ... [2021-11-20 22:51:23,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:51:24,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:51:24,360 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2021-11-20 22:51:24,365 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2021-11-20 22:51:24,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2021-11-20 22:51:24,368 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2021-11-20 22:51:24,370 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2021-11-20 22:51:24,372 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2021-11-20 22:51:24,374 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2021-11-20 22:51:24,377 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2021-11-20 22:51:24,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2021-11-20 22:51:24,382 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2021-11-20 22:51:24,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2021-11-20 22:51:24,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2021-11-20 22:51:24,388 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2021-11-20 22:51:24,391 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2021-11-20 22:51:24,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:24,413 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:51:24,450 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2021-11-20 22:51:24,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2021-11-20 22:51:24,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2021-11-20 22:51:24,452 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2021-11-20 22:51:24,453 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2021-11-20 22:51:24,454 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2021-11-20 22:51:24,455 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2021-11-20 22:51:24,456 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2021-11-20 22:51:24,457 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2021-11-20 22:51:24,458 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2021-11-20 22:51:24,459 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2021-11-20 22:51:24,460 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2021-11-20 22:51:24,461 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2021-11-20 22:51:24,463 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2021-11-20 22:51:24,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:51:24,497 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:51:24,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24 WrapperNode [2021-11-20 22:51:24,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:51:24,499 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:24,499 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:51:24,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:51:24,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,550 INFO L137 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 222 [2021-11-20 22:51:24,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:51:24,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:51:24,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:51:24,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:51:24,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:51:24,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:51:24,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:51:24,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:51:24,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (1/1) ... [2021-11-20 22:51:24,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:51:24,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:24,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:51:24,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:51:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:51:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:51:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:51:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:51:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:51:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:51:24,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:51:24,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:51:24,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:51:24,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:51:24,777 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:51:24,778 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:51:25,306 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:51:25,346 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:51:25,346 INFO L301 CfgBuilder]: Removed 31 assume(true) statements. [2021-11-20 22:51:25,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:25 BoogieIcfgContainer [2021-11-20 22:51:25,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:51:25,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:51:25,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:51:25,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:51:25,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:51:23" (1/3) ... [2021-11-20 22:51:25,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0cc033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:25, skipping insertion in model container [2021-11-20 22:51:25,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:51:24" (2/3) ... [2021-11-20 22:51:25,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0cc033 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:25, skipping insertion in model container [2021-11-20 22:51:25,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:25" (3/3) ... [2021-11-20 22:51:25,357 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-queue-2.i [2021-11-20 22:51:25,363 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:51:25,363 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2021-11-20 22:51:25,448 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:51:25,473 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:51:25,474 INFO L340 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2021-11-20 22:51:25,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 86 states have (on average 2.441860465116279) internal successors, (210), 156 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-20 22:51:25,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:25,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-20 22:51:25,517 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:25,522 INFO L85 PathProgramCache]: Analyzing trace with hash 14481, now seen corresponding path program 1 times [2021-11-20 22:51:25,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:25,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376131341] [2021-11-20 22:51:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:25,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:25,718 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:25,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376131341] [2021-11-20 22:51:25,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376131341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:25,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:25,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-20 22:51:25,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622591365] [2021-11-20 22:51:25,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:25,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:25,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:25,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:25,765 INFO L87 Difference]: Start difference. First operand has 157 states, 86 states have (on average 2.441860465116279) internal successors, (210), 156 states have internal predecessors, (210), 0 states have call successors, (0), 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) [2021-11-20 22:51:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:25,981 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2021-11-20 22:51:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:25,983 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 [2021-11-20 22:51:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:25,998 INFO L225 Difference]: With dead ends: 153 [2021-11-20 22:51:25,998 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 22:51:26,000 INFO L932 BasicCegarLoop]: 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 [2021-11-20 22:51:26,007 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 146 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:26,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 91 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:51:26,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 22:51:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2021-11-20 22:51:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.8068181818181819) internal successors, (159), 147 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2021-11-20 22:51:26,083 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 2 [2021-11-20 22:51:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:26,084 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2021-11-20 22:51:26,084 INFO L471 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) [2021-11-20 22:51:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2021-11-20 22:51:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-20 22:51:26,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:26,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-20 22:51:26,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:51:26,086 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:26,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash 14482, now seen corresponding path program 1 times [2021-11-20 22:51:26,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:26,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028856062] [2021-11-20 22:51:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:26,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:26,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:26,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028856062] [2021-11-20 22:51:26,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028856062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:26,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:26,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-20 22:51:26,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662044356] [2021-11-20 22:51:26,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:26,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:26,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:26,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:26,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:26,170 INFO L87 Difference]: Start difference. First operand 148 states and 159 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) [2021-11-20 22:51:26,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:26,300 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2021-11-20 22:51:26,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:26,301 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 [2021-11-20 22:51:26,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:26,305 INFO L225 Difference]: With dead ends: 140 [2021-11-20 22:51:26,305 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 22:51:26,306 INFO L932 BasicCegarLoop]: 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 [2021-11-20 22:51:26,308 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 134 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:26,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 96 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:26,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 22:51:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2021-11-20 22:51:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.6818181818181819) internal successors, (148), 137 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) [2021-11-20 22:51:26,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2021-11-20 22:51:26,331 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 2 [2021-11-20 22:51:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:26,331 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2021-11-20 22:51:26,331 INFO L471 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) [2021-11-20 22:51:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2021-11-20 22:51:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:51:26,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:26,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:51:26,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 22:51:26,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:26,333 INFO L85 PathProgramCache]: Analyzing trace with hash 500446804, now seen corresponding path program 1 times [2021-11-20 22:51:26,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:26,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120512443] [2021-11-20 22:51:26,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:26,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:26,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:26,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120512443] [2021-11-20 22:51:26,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120512443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:26,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:26,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:26,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763422063] [2021-11-20 22:51:26,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:26,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:26,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:26,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:26,438 INFO L87 Difference]: Start difference. First operand 138 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) [2021-11-20 22:51:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:26,600 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2021-11-20 22:51:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:51:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 22:51:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:26,602 INFO L225 Difference]: With dead ends: 146 [2021-11-20 22:51:26,602 INFO L226 Difference]: Without dead ends: 146 [2021-11-20 22:51:26,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:26,604 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 237 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:26,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 96 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-20 22:51:26,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-11-20 22:51:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 94 states have (on average 1.627659574468085) internal successors, (153), 138 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2021-11-20 22:51:26,628 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 6 [2021-11-20 22:51:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:26,628 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2021-11-20 22:51:26,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2021-11-20 22:51:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:51:26,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:26,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:51:26,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 22:51:26,630 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash 500446805, now seen corresponding path program 1 times [2021-11-20 22:51:26,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:26,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671556283] [2021-11-20 22:51:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:26,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:26,735 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:26,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671556283] [2021-11-20 22:51:26,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671556283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:26,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:26,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:51:26,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502978593] [2021-11-20 22:51:26,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:26,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:26,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:26,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:26,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:26,745 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:26,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:26,954 INFO L93 Difference]: Finished difference Result 225 states and 240 transitions. [2021-11-20 22:51:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:51:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 22:51:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:26,957 INFO L225 Difference]: With dead ends: 225 [2021-11-20 22:51:26,957 INFO L226 Difference]: Without dead ends: 225 [2021-11-20 22:51:26,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:26,960 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 295 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:26,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 157 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:51:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-20 22:51:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 143. [2021-11-20 22:51:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 98 states have (on average 1.6020408163265305) internal successors, (157), 142 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:26,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2021-11-20 22:51:26,978 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 6 [2021-11-20 22:51:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:26,978 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2021-11-20 22:51:26,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2021-11-20 22:51:26,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 22:51:26,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:26,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:26,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 22:51:26,985 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1666017632, now seen corresponding path program 1 times [2021-11-20 22:51:26,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:26,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806269602] [2021-11-20 22:51:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:26,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:27,047 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806269602] [2021-11-20 22:51:27,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806269602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:27,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:27,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:51:27,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551868976] [2021-11-20 22:51:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:27,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:27,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:27,050 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:27,096 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-11-20 22:51:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:27,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-20 22:51:27,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:27,097 INFO L225 Difference]: With dead ends: 133 [2021-11-20 22:51:27,098 INFO L226 Difference]: Without dead ends: 133 [2021-11-20 22:51:27,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:27,100 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 114 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:27,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 110 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:51:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-20 22:51:27,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-20 22:51:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 93 states have (on average 1.5698924731182795) internal successors, (146), 132 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2021-11-20 22:51:27,108 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 7 [2021-11-20 22:51:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:27,108 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2021-11-20 22:51:27,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,109 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2021-11-20 22:51:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 22:51:27,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:27,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:27,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 22:51:27,110 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:27,111 INFO L85 PathProgramCache]: Analyzing trace with hash -106550054, now seen corresponding path program 1 times [2021-11-20 22:51:27,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:27,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674160692] [2021-11-20 22:51:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:27,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:27,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:27,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674160692] [2021-11-20 22:51:27,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674160692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:27,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:27,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 22:51:27,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914050839] [2021-11-20 22:51:27,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:27,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:51:27,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:27,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:51:27,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:27,209 INFO L87 Difference]: Start difference. First operand 133 states and 146 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) [2021-11-20 22:51:27,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:27,366 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2021-11-20 22:51:27,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:51:27,366 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 [2021-11-20 22:51:27,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:27,367 INFO L225 Difference]: With dead ends: 135 [2021-11-20 22:51:27,368 INFO L226 Difference]: Without dead ends: 135 [2021-11-20 22:51:27,368 INFO L932 BasicCegarLoop]: 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 [2021-11-20 22:51:27,370 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 101 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:27,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 258 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-20 22:51:27,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-11-20 22:51:27,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 93 states have (on average 1.5591397849462365) internal successors, (145), 131 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 145 transitions. [2021-11-20 22:51:27,375 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 145 transitions. Word has length 8 [2021-11-20 22:51:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:27,375 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 145 transitions. [2021-11-20 22:51:27,375 INFO L471 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) [2021-11-20 22:51:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 145 transitions. [2021-11-20 22:51:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 22:51:27,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:27,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:27,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 22:51:27,377 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:27,377 INFO L85 PathProgramCache]: Analyzing trace with hash -106550053, now seen corresponding path program 1 times [2021-11-20 22:51:27,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:27,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215839584] [2021-11-20 22:51:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:27,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:27,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:27,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215839584] [2021-11-20 22:51:27,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215839584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:27,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:27,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:27,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650727287] [2021-11-20 22:51:27,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:27,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:51:27,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:51:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:51:27,529 INFO L87 Difference]: Start difference. First operand 132 states and 145 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:27,828 INFO L93 Difference]: Finished difference Result 194 states and 210 transitions. [2021-11-20 22:51:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:51:27,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 22:51:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:27,830 INFO L225 Difference]: With dead ends: 194 [2021-11-20 22:51:27,830 INFO L226 Difference]: Without dead ends: 194 [2021-11-20 22:51:27,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:51:27,831 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 197 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:27,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 441 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:51:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-20 22:51:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 122. [2021-11-20 22:51:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 89 states have (on average 1.5056179775280898) internal successors, (134), 121 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions. [2021-11-20 22:51:27,835 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 8 [2021-11-20 22:51:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:27,835 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 134 transitions. [2021-11-20 22:51:27,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions. [2021-11-20 22:51:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 22:51:27,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:27,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:27,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 22:51:27,837 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1560613291, now seen corresponding path program 1 times [2021-11-20 22:51:27,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:27,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150655171] [2021-11-20 22:51:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:27,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:27,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:27,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150655171] [2021-11-20 22:51:27,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150655171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:27,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:27,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:27,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135311887] [2021-11-20 22:51:27,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:27,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:51:27,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:27,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:51:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:27,905 INFO L87 Difference]: Start difference. First operand 122 states and 134 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:27,975 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2021-11-20 22:51:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:51:27,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 22:51:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:27,977 INFO L225 Difference]: With dead ends: 153 [2021-11-20 22:51:27,977 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 22:51:27,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:51:27,978 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 140 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:27,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 180 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 22:51:27,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2021-11-20 22:51:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 100 states have (on average 1.46) internal successors, (146), 132 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2021-11-20 22:51:27,983 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 13 [2021-11-20 22:51:27,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:27,984 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2021-11-20 22:51:27,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2021-11-20 22:51:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 22:51:27,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:27,986 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:27,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 22:51:27,986 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:27,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1586118442, now seen corresponding path program 1 times [2021-11-20 22:51:27,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:27,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156789105] [2021-11-20 22:51:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:27,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:28,112 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:28,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156789105] [2021-11-20 22:51:28,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156789105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:28,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:28,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:28,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772407655] [2021-11-20 22:51:28,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:28,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:51:28,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:28,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:51:28,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:51:28,115 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:28,247 INFO L93 Difference]: Finished difference Result 136 states and 148 transitions. [2021-11-20 22:51:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:51:28,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 22:51:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:28,249 INFO L225 Difference]: With dead ends: 136 [2021-11-20 22:51:28,249 INFO L226 Difference]: Without dead ends: 136 [2021-11-20 22:51:28,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:51:28,257 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 194 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:28,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 294 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:28,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-20 22:51:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2021-11-20 22:51:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 99 states have (on average 1.4545454545454546) internal successors, (144), 130 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-11-20 22:51:28,261 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 14 [2021-11-20 22:51:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:28,261 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-11-20 22:51:28,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-11-20 22:51:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 22:51:28,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:28,262 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:28,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 22:51:28,263 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash 906839708, now seen corresponding path program 1 times [2021-11-20 22:51:28,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:28,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542484166] [2021-11-20 22:51:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:28,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:28,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:28,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542484166] [2021-11-20 22:51:28,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542484166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:28,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:28,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 22:51:28,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234554090] [2021-11-20 22:51:28,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:28,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:51:28,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:28,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:51:28,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:28,313 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:28,422 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2021-11-20 22:51:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:51:28,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 22:51:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:28,424 INFO L225 Difference]: With dead ends: 136 [2021-11-20 22:51:28,424 INFO L226 Difference]: Without dead ends: 136 [2021-11-20 22:51:28,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:51:28,425 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 4 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:28,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 388 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-20 22:51:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-11-20 22:51:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 133 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 147 transitions. [2021-11-20 22:51:28,429 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 147 transitions. Word has length 16 [2021-11-20 22:51:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:28,430 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 147 transitions. [2021-11-20 22:51:28,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 147 transitions. [2021-11-20 22:51:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 22:51:28,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:28,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:28,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 22:51:28,431 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1953337202, now seen corresponding path program 1 times [2021-11-20 22:51:28,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:28,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410456819] [2021-11-20 22:51:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:28,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:28,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:28,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:28,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410456819] [2021-11-20 22:51:28,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410456819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:28,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:28,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:28,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016831767] [2021-11-20 22:51:28,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:28,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:51:28,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:51:28,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:28,502 INFO L87 Difference]: Start difference. First operand 134 states and 147 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:28,587 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2021-11-20 22:51:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:51:28,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 22:51:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:28,589 INFO L225 Difference]: With dead ends: 134 [2021-11-20 22:51:28,589 INFO L226 Difference]: Without dead ends: 134 [2021-11-20 22:51:28,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:51:28,590 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 113 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:28,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 254 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:51:28,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-20 22:51:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-11-20 22:51:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 102 states have (on average 1.4313725490196079) internal successors, (146), 133 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2021-11-20 22:51:28,596 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 17 [2021-11-20 22:51:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:28,596 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2021-11-20 22:51:28,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2021-11-20 22:51:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 22:51:28,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:28,599 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:28,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 22:51:28,599 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash 643754262, now seen corresponding path program 1 times [2021-11-20 22:51:28,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:28,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649799657] [2021-11-20 22:51:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:28,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:28,668 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649799657] [2021-11-20 22:51:28,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649799657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:28,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584655306] [2021-11-20 22:51:28,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:28,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:28,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:28,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:28,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:51:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:28,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 22:51:28,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:28,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:28,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:28,828 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 22:51:28,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:51:28,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:28,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:51:28,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 22:51:28,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-20 22:51:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:28,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:29,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:29,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584655306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:29,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126124562] [2021-11-20 22:51:29,191 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-20 22:51:29,191 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:29,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:29,201 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:29,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:29,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:51:29,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:29,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 22:51:29,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:29,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:51:29,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:51:29,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:29,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 22:51:31,342 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:32,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [126124562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:32,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:51:32,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4, 4] total 12 [2021-11-20 22:51:32,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33434028] [2021-11-20 22:51:32,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:32,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:51:32,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:32,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:51:32,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:51:32,059 INFO L87 Difference]: Start difference. First operand 134 states and 146 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:32,579 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2021-11-20 22:51:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 22:51:32,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 22:51:32,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:32,582 INFO L225 Difference]: With dead ends: 146 [2021-11-20 22:51:32,582 INFO L226 Difference]: Without dead ends: 146 [2021-11-20 22:51:32,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:51:32,583 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 12 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:32,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 340 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 22:51:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-20 22:51:32,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-11-20 22:51:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 108 states have (on average 1.4166666666666667) internal successors, (153), 139 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2021-11-20 22:51:32,587 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 20 [2021-11-20 22:51:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:32,587 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2021-11-20 22:51:32,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2021-11-20 22:51:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 22:51:32,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:32,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:32,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:32,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 22:51:32,789 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:32,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:32,790 INFO L85 PathProgramCache]: Analyzing trace with hash 643755330, now seen corresponding path program 1 times [2021-11-20 22:51:32,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:32,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685658617] [2021-11-20 22:51:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:32,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:32,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:32,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685658617] [2021-11-20 22:51:32,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685658617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:32,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315615092] [2021-11-20 22:51:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:32,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:32,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:32,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:32,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:51:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:32,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 22:51:32,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:33,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:33,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315615092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:33,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118391643] [2021-11-20 22:51:33,118 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-20 22:51:33,119 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:33,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:33,119 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:33,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:33,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:33,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:33,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:51:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:33,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-20 22:51:33,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:33,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:33,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:33,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:51:33,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:33,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-20 22:51:33,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:33,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:51:35,099 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:35,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2118391643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:35,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:51:35,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 15 [2021-11-20 22:51:35,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289899032] [2021-11-20 22:51:35,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:35,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 22:51:35,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:35,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 22:51:35,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:51:35,847 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:36,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:36,295 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2021-11-20 22:51:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:51:36,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 22:51:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:36,298 INFO L225 Difference]: With dead ends: 141 [2021-11-20 22:51:36,298 INFO L226 Difference]: Without dead ends: 126 [2021-11-20 22:51:36,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:51:36,301 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 11 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:36,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 342 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 22:51:36,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-20 22:51:36,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-20 22:51:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 94 states have (on average 1.4574468085106382) internal successors, (137), 125 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2021-11-20 22:51:36,305 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 20 [2021-11-20 22:51:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:36,306 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2021-11-20 22:51:36,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2021-11-20 22:51:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 22:51:36,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:36,307 INFO L514 BasicCegarLoop]: 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] [2021-11-20 22:51:36,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:36,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 22:51:36,529 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:36,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1524985434, now seen corresponding path program 1 times [2021-11-20 22:51:36,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:36,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093322712] [2021-11-20 22:51:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:36,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:36,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:36,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093322712] [2021-11-20 22:51:36,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093322712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:36,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588557794] [2021-11-20 22:51:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:36,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:36,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:36,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:36,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:51:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:36,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 22:51:36,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:36,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:36,888 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:51:36,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 22:51:36,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:51:37,004 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:51:37,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-20 22:51:37,075 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:51:37,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 44 [2021-11-20 22:51:37,292 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:51:37,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2021-11-20 22:51:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:37,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:38,413 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.offset| Int) (v_DerPreprocessor_3 Int)) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |ULTIMATE.start_main_~item~0#1.offset| 0) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|) v_DerPreprocessor_3)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2021-11-20 22:51:41,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 684 treesize of output 668 [2021-11-20 22:51:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:41,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588557794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:51:41,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [252509237] [2021-11-20 22:51:41,501 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-20 22:51:41,501 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:51:41,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:51:41,502 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:51:41,502 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:51:41,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:51:41,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 22:51:41,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:51:41,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:51:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:51:41,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-20 22:51:41,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:51:41,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 22:51:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:41,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-20 22:51:42,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 22:51:42,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 22:51:42,261 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:51:42,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-20 22:51:42,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:51:42,334 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:51:42,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-20 22:51:42,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,493 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:51:42,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:51:42,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:51:42,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:42,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-20 22:51:43,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 42 [2021-11-20 22:51:43,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:43,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:51:43,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2021-11-20 22:51:43,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-20 22:51:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 76 [2021-11-20 22:51:43,576 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-11-20 22:51:43,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 231 treesize of output 160 [2021-11-20 22:51:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:43,611 INFO L354 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2021-11-20 22:51:43,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 227 treesize of output 224 [2021-11-20 22:51:43,635 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-11-20 22:51:43,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 212 treesize of output 206 [2021-11-20 22:51:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:43,793 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:51:43,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:51:43,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:51:43,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-20 22:51:43,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:43,889 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:51:43,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:51:45,631 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:51:45,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 381 treesize of output 386 [2021-11-20 22:51:46,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:46,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:46,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:46,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:51:46,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:46,537 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:51:46,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 309 treesize of output 292 [2021-11-20 22:51:46,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:46,568 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:51:46,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 294 treesize of output 297 [2021-11-20 22:51:46,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:51:46,617 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:51:46,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 312 [2021-11-20 22:51:47,125 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:51:47,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 54 [2021-11-20 22:51:47,146 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 22:51:47,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 58 [2021-11-20 22:51:47,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:51:47,353 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:51:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [252509237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:49,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:51:49,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11, 9, 9] total 36 [2021-11-20 22:51:49,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066270860] [2021-11-20 22:51:49,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:49,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:51:49,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:51:49,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1058, Unknown=3, NotChecked=68, Total=1332 [2021-11-20 22:51:49,164 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:50,381 INFO L93 Difference]: Finished difference Result 198 states and 220 transitions. [2021-11-20 22:51:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 22:51:50,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 22:51:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:50,383 INFO L225 Difference]: With dead ends: 198 [2021-11-20 22:51:50,383 INFO L226 Difference]: Without dead ends: 198 [2021-11-20 22:51:50,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=266, Invalid=1295, Unknown=3, NotChecked=76, Total=1640 [2021-11-20 22:51:50,384 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 130 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:50,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 398 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 339 Invalid, 0 Unknown, 215 Unchecked, 0.6s Time] [2021-11-20 22:51:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-20 22:51:50,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2021-11-20 22:51:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 115 states have (on average 1.4) internal successors, (161), 146 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) [2021-11-20 22:51:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 161 transitions. [2021-11-20 22:51:50,390 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 161 transitions. Word has length 24 [2021-11-20 22:51:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:50,391 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 161 transitions. [2021-11-20 22:51:50,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:50,391 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 161 transitions. [2021-11-20 22:51:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 22:51:50,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:50,394 INFO L514 BasicCegarLoop]: 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, 1, 1, 1] [2021-11-20 22:51:50,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:51:50,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 22:51:50,610 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:50,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1439405483, now seen corresponding path program 1 times [2021-11-20 22:51:50,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:50,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289075079] [2021-11-20 22:51:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:50,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:50,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:50,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289075079] [2021-11-20 22:51:50,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289075079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:51:50,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:51:50,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:51:50,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562831170] [2021-11-20 22:51:50,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:51:50,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:51:50,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:51:50,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:51:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:51:50,639 INFO L87 Difference]: Start difference. First operand 147 states and 161 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:51:50,690 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2021-11-20 22:51:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:51:50,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 22:51:50,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:51:50,692 INFO L225 Difference]: With dead ends: 198 [2021-11-20 22:51:50,693 INFO L226 Difference]: Without dead ends: 198 [2021-11-20 22:51:50,693 INFO L932 BasicCegarLoop]: 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 [2021-11-20 22:51:50,694 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 45 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:51:50,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 193 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:51:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-20 22:51:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 156. [2021-11-20 22:51:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 124 states have (on average 1.3629032258064515) internal successors, (169), 155 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 169 transitions. [2021-11-20 22:51:50,699 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 169 transitions. Word has length 27 [2021-11-20 22:51:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:51:50,699 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 169 transitions. [2021-11-20 22:51:50,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:51:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 169 transitions. [2021-11-20 22:51:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 22:51:50,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:51:50,701 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:51:50,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-20 22:51:50,701 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:51:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:51:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash -559240723, now seen corresponding path program 1 times [2021-11-20 22:51:50,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:51:50,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319224071] [2021-11-20 22:51:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:50,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:51:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:50,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:51:50,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319224071] [2021-11-20 22:51:50,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319224071] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:51:50,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421527545] [2021-11-20 22:51:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:51:50,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:51:50,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:51:50,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:51:50,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:51:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:51:50,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 22:51:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:51:50,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:51:51,038 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:51:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:51:51,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 22:51:51,182 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:51:51,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-20 22:51:51,270 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:51:51,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 45 [2021-11-20 22:51:51,576 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:51:51,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-20 22:51:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:51:51,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:51:58,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1562 treesize of output 1530 [2021-11-20 22:54:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:54:58,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421527545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:54:58,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231094536] [2021-11-20 22:54:58,978 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2021-11-20 22:54:58,978 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:54:58,978 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:54:58,979 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:54:58,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:54:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:54:59,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:59,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:54:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 22:54:59,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:54:59,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:54:59,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-20 22:54:59,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 22:54:59,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-20 22:54:59,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 22:54:59,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 22:54:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,607 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 22:54:59,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-11-20 22:54:59,649 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:54:59,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-20 22:54:59,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:54:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-20 22:54:59,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 22:54:59,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:54:59,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-20 22:55:00,525 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:55:00,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 276 treesize of output 281 [2021-11-20 22:55:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:00,938 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:55:00,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 309 treesize of output 303 [2021-11-20 22:55:00,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:00,973 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:55:00,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 298 treesize of output 301 [2021-11-20 22:55:00,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:00,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:00,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:00,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:01,004 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:55:01,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 322 treesize of output 305 [2021-11-20 22:55:02,089 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-11-20 22:55:02,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 343 [2021-11-20 22:55:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:02,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:02,179 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:55:02,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 398 treesize of output 381 [2021-11-20 22:55:02,249 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-11-20 22:55:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 383 treesize of output 384 [2021-11-20 22:55:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:03,392 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:55:03,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 96 [2021-11-20 22:55:03,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:03,410 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:55:03,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 90 treesize of output 73 [2021-11-20 22:55:03,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:03,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 22:55:04,229 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:55:04,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 276 treesize of output 281 [2021-11-20 22:55:04,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:04,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:04,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:04,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:04,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:04,729 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:55:04,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 309 treesize of output 292 [2021-11-20 22:55:04,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:04,764 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:55:04,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 294 treesize of output 297 [2021-11-20 22:55:04,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:04,795 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:55:04,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 312 [2021-11-20 22:55:05,904 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-20 22:55:05,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 347 [2021-11-20 22:55:05,969 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-20 22:55:05,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 395 [2021-11-20 22:55:05,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:05,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:06,045 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:55:06,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 397 treesize of output 380 [2021-11-20 22:55:07,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:07,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:07,246 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-20 22:55:07,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:55:07,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:07,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:07,321 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-20 22:55:07,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 103 [2021-11-20 22:55:07,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:07,344 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:55:07,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 93 [2021-11-20 22:55:10,030 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:55:13,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1231094536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:13,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:55:13,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [10, 8, 8] total 40 [2021-11-20 22:55:13,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515112745] [2021-11-20 22:55:13,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:13,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 22:55:13,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 22:55:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1270, Unknown=3, NotChecked=0, Total=1640 [2021-11-20 22:55:13,526 INFO L87 Difference]: Start difference. First operand 156 states and 169 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:15,060 INFO L93 Difference]: Finished difference Result 194 states and 212 transitions. [2021-11-20 22:55:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 22:55:15,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-20 22:55:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:15,062 INFO L225 Difference]: With dead ends: 194 [2021-11-20 22:55:15,062 INFO L226 Difference]: Without dead ends: 194 [2021-11-20 22:55:15,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=426, Invalid=1463, Unknown=3, NotChecked=0, Total=1892 [2021-11-20 22:55:15,064 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 44 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:15,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 602 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 647 Invalid, 0 Unknown, 200 Unchecked, 0.8s Time] [2021-11-20 22:55:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-20 22:55:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 168. [2021-11-20 22:55:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 167 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2021-11-20 22:55:15,069 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 32 [2021-11-20 22:55:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:15,070 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2021-11-20 22:55:15,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2021-11-20 22:55:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 22:55:15,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:15,071 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:15,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:55:15,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 22:55:15,285 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:55:15,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:15,285 INFO L85 PathProgramCache]: Analyzing trace with hash -559358684, now seen corresponding path program 1 times [2021-11-20 22:55:15,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:15,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595462174] [2021-11-20 22:55:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:15,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:15,629 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:15,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595462174] [2021-11-20 22:55:15,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595462174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:15,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882172845] [2021-11-20 22:55:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:15,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:15,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:15,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:15,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 22:55:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 22:55:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:15,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:55:15,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:55:15,751 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:55:15,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 22:55:15,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 22:55:15,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:15,904 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:55:15,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 22:55:15,923 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:55:15,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-20 22:55:16,044 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:55:16,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 101 [2021-11-20 22:55:16,068 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-20 22:55:16,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 88 [2021-11-20 22:55:16,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 74 [2021-11-20 22:55:16,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 62 [2021-11-20 22:55:16,545 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:55:16,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 50 [2021-11-20 22:55:16,550 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:55:16,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-20 22:55:16,639 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-11-20 22:55:16,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 28 [2021-11-20 22:55:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:16,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:55:16,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 85 [2021-11-20 22:55:16,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 406 treesize of output 398 [2021-11-20 22:55:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1748 treesize of output 1716 [2021-11-20 22:55:17,060 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 22:55:17,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [877818514] [2021-11-20 22:55:17,063 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-20 22:55:17,063 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:55:17,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:55:17,064 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:55:17,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:55:17,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:55:17,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:17,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:17,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 22:55:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 22:55:17,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:55:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:55:17,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 22:55:17,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:55:17,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-20 22:55:17,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 22:55:17,797 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:55:17,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-20 22:55:17,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:17,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:55:17,870 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:55:17,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:55:18,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:18,047 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:55:18,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-20 22:55:18,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:18,069 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:55:18,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:55:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:18,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:18,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:55:18,681 INFO L354 Elim1Store]: treesize reduction 120, result has 17.2 percent of original size [2021-11-20 22:55:18,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 296 treesize of output 301 [2021-11-20 22:55:19,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,254 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:55:19,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 333 treesize of output 312 [2021-11-20 22:55:19,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:19,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:19,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:19,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,294 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:55:19,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 316 [2021-11-20 22:55:19,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:19,321 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:55:19,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 312 [2021-11-20 22:55:20,437 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-20 22:55:20,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 347 [2021-11-20 22:55:20,550 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-20 22:55:20,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 395 [2021-11-20 22:55:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:20,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:20,672 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:55:20,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 397 treesize of output 380 [2021-11-20 22:55:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:21,725 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:55:21,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 89 treesize of output 56 [2021-11-20 22:55:21,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:21,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:21,771 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:55:21,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-20 22:55:21,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:21,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:21,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:21,845 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:55:21,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:55:22,616 INFO L354 Elim1Store]: treesize reduction 120, result has 17.2 percent of original size [2021-11-20 22:55:22,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 296 treesize of output 301 [2021-11-20 22:55:23,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:23,153 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:55:23,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 333 treesize of output 312 [2021-11-20 22:55:23,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:23,186 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:55:23,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 333 treesize of output 327 [2021-11-20 22:55:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:23,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:23,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:23,207 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:55:23,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 329 treesize of output 312 [2021-11-20 22:55:24,220 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-11-20 22:55:24,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 343 [2021-11-20 22:55:24,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:24,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:24,321 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:55:24,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 398 treesize of output 381 [2021-11-20 22:55:24,364 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-20 22:55:24,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 383 treesize of output 380 [2021-11-20 22:55:25,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:25,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:25,394 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-20 22:55:25,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:55:25,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:25,449 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:55:25,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 129 treesize of output 96 [2021-11-20 22:55:25,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:25,467 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:55:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 73 [2021-11-20 22:55:28,423 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:55:32,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [877818514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:55:32,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:55:32,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [13] total 29 [2021-11-20 22:55:32,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144910943] [2021-11-20 22:55:32,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:55:32,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 22:55:32,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:55:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 22:55:32,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 22:55:32,227 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:33,854 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2021-11-20 22:55:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 22:55:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 22:55:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:33,856 INFO L225 Difference]: With dead ends: 173 [2021-11-20 22:55:33,856 INFO L226 Difference]: Without dead ends: 173 [2021-11-20 22:55:33,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=333, Invalid=1559, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 22:55:33,857 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 33 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:33,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 419 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 458 Invalid, 0 Unknown, 192 Unchecked, 0.6s Time] [2021-11-20 22:55:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-20 22:55:33,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2021-11-20 22:55:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 136 states have (on average 1.338235294117647) internal successors, (182), 167 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 182 transitions. [2021-11-20 22:55:33,862 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 182 transitions. Word has length 34 [2021-11-20 22:55:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:33,863 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 182 transitions. [2021-11-20 22:55:33,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 182 transitions. [2021-11-20 22:55:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 22:55:33,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:33,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:55:33,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:55:34,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 22:55:34,077 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:55:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:34,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1341637657, now seen corresponding path program 1 times [2021-11-20 22:55:34,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:34,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907698554] [2021-11-20 22:55:34,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:34,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:34,271 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:34,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907698554] [2021-11-20 22:55:34,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907698554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:34,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021495395] [2021-11-20 22:55:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:34,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:34,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:34,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:34,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 22:55:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:34,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 22:55:34,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:55:34,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:55:34,410 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 22:55:34,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-20 22:55:34,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 22:55:34,525 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:55:34,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-20 22:55:34,611 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:55:34,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 45 [2021-11-20 22:55:34,987 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:55:34,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-11-20 22:55:35,034 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-20 22:55:35,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-11-20 22:55:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:35,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:55:41,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 430 [2021-11-20 22:55:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:45,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021495395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:55:45,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109200320] [2021-11-20 22:55:45,040 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-20 22:55:45,040 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:55:45,040 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:55:45,040 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:55:45,041 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:55:45,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:55:45,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:55:45,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:55:45,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 22:55:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:55:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 22:55:45,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:55:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 22:55:45,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 22:55:45,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 22:55:45,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-20 22:55:45,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,616 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 22:55:45,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-11-20 22:55:45,649 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:55:45,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:55:45,705 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:55:45,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-20 22:55:45,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,883 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:55:45,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:55:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-20 22:55:45,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:45,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:55:46,501 INFO L354 Elim1Store]: treesize reduction 120, result has 17.2 percent of original size [2021-11-20 22:55:46,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 296 treesize of output 301 [2021-11-20 22:55:46,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:47,022 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:55:47,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 333 treesize of output 312 [2021-11-20 22:55:47,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:47,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:47,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:47,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:47,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:47,083 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:55:47,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 316 [2021-11-20 22:55:47,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:47,117 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:55:47,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 312 [2021-11-20 22:55:48,294 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-11-20 22:55:48,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 343 [2021-11-20 22:55:48,367 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-20 22:55:48,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 395 [2021-11-20 22:55:48,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:48,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:48,450 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:55:48,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 397 treesize of output 380 [2021-11-20 22:55:49,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,717 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:55:49,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 89 treesize of output 56 [2021-11-20 22:55:49,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,782 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:55:49,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-20 22:55:49,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:49,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:49,817 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:55:49,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:55:50,501 INFO L354 Elim1Store]: treesize reduction 120, result has 17.2 percent of original size [2021-11-20 22:55:50,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 296 treesize of output 301 [2021-11-20 22:55:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:51,063 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:55:51,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 333 treesize of output 312 [2021-11-20 22:55:51,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:51,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:51,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:51,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:51,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:51,094 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:55:51,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 316 [2021-11-20 22:55:51,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:51,131 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:55:51,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 312 [2021-11-20 22:55:52,268 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-11-20 22:55:52,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 343 [2021-11-20 22:55:52,316 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-20 22:55:52,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 395 [2021-11-20 22:55:52,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:52,368 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:55:52,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 397 treesize of output 380 [2021-11-20 22:55:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:53,378 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:55:53,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 30 [2021-11-20 22:55:53,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:53,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:53,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:55:53,419 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:55:53,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:55:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:53,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:53,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:55:53,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 22:56:00,126 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:56:04,577 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:56:04,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:56:04,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2021-11-20 22:56:04,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241095515] [2021-11-20 22:56:04,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:56:04,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 22:56:04,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 22:56:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2041, Unknown=2, NotChecked=0, Total=2450 [2021-11-20 22:56:04,580 INFO L87 Difference]: Start difference. First operand 168 states and 182 transitions. Second operand has 31 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:04,939 INFO L93 Difference]: Finished difference Result 179 states and 195 transitions. [2021-11-20 22:56:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 22:56:04,940 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 22:56:04,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:04,942 INFO L225 Difference]: With dead ends: 179 [2021-11-20 22:56:04,942 INFO L226 Difference]: Without dead ends: 179 [2021-11-20 22:56:04,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=466, Invalid=2288, Unknown=2, NotChecked=0, Total=2756 [2021-11-20 22:56:04,943 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 304 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:04,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 962 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 460 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2021-11-20 22:56:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-20 22:56:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2021-11-20 22:56:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 143 states have (on average 1.3356643356643356) internal successors, (191), 174 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 191 transitions. [2021-11-20 22:56:04,949 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 191 transitions. Word has length 36 [2021-11-20 22:56:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:04,949 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 191 transitions. [2021-11-20 22:56:04,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.433333333333333) internal successors, (103), 30 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 191 transitions. [2021-11-20 22:56:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 22:56:04,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:04,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:04,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:56:05,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 22:56:05,153 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr65REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:56:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:05,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1341637656, now seen corresponding path program 1 times [2021-11-20 22:56:05,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:05,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785882410] [2021-11-20 22:56:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:05,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:56:05,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785882410] [2021-11-20 22:56:05,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785882410] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:56:05,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188557869] [2021-11-20 22:56:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:05,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:05,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:56:05,358 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:56:05,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 22:56:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 22:56:05,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:05,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:56:05,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:56:05,479 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:56:05,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 22:56:05,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 22:56:05,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:56:05,572 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:56:05,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 22:56:05,589 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:56:05,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-11-20 22:56:05,666 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:56:05,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 78 [2021-11-20 22:56:05,681 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-20 22:56:05,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 53 [2021-11-20 22:56:06,060 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:56:06,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 40 [2021-11-20 22:56:06,063 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:56:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-11-20 22:56:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:56:06,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:56:08,320 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_9 Int) (|ULTIMATE.start_main_~item~0#1.offset| Int)) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) |ULTIMATE.start_main_~item~0#1.offset| 0) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|) v_DerPreprocessor_9)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_DerPreprocessor_9 Int) (v_DerPreprocessor_8 Int) (|ULTIMATE.start_main_~item~0#1.offset| Int)) (let ((.cse0 (+ 4 |ULTIMATE.start_main_~item~0#1.offset|))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base|) |ULTIMATE.start_main_~item~0#1.offset| 0) .cse0 v_DerPreprocessor_9)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |ULTIMATE.start_main_~item~0#1.offset| 0) .cse0 v_DerPreprocessor_8)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) is different from false [2021-11-20 22:56:20,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3746 treesize of output 3714 [2021-11-20 22:56:20,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53026 treesize of output 52002 [2021-11-20 22:56:23,333 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 22:56:23,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1150763018] [2021-11-20 22:56:23,335 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-20 22:56:23,335 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:56:23,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:56:23,336 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:56:23,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:56:23,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:56:23,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 22:56:23,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:56:23,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:56:23,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 22:56:23,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:56:23,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:56:23,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 22:56:23,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 22:56:23,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 22:56:23,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-20 22:56:23,896 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:56:23,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-20 22:56:23,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:56:23,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:23,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-11-20 22:56:24,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:24,083 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:56:24,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:56:24,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:24,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:24,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-20 22:56:24,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:24,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:24,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:24,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 22:56:24,683 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:56:24,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 276 treesize of output 281 [2021-11-20 22:56:25,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:25,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:25,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:25,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:25,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:25,219 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:56:25,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 309 treesize of output 292 [2021-11-20 22:56:25,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:25,244 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:56:25,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 294 treesize of output 288 [2021-11-20 22:56:25,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:25,275 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:56:25,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 283 treesize of output 286 [2021-11-20 22:56:26,356 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-11-20 22:56:26,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 343 [2021-11-20 22:56:26,406 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-11-20 22:56:26,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 399 [2021-11-20 22:56:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:26,464 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:56:26,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 397 treesize of output 380 [2021-11-20 22:56:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:27,792 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-20 22:56:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:56:27,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:27,850 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:56:27,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 129 treesize of output 96 [2021-11-20 22:56:27,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:27,867 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:56:27,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 90 treesize of output 73 [2021-11-20 22:56:28,625 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:56:28,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 276 treesize of output 281 [2021-11-20 22:56:29,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:29,214 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:56:29,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 309 treesize of output 312 [2021-11-20 22:56:29,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:29,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:29,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:29,248 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:56:29,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 333 treesize of output 316 [2021-11-20 22:56:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:29,280 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:56:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 312 [2021-11-20 22:56:30,315 INFO L354 Elim1Store]: treesize reduction 96, result has 21.3 percent of original size [2021-11-20 22:56:30,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 347 [2021-11-20 22:56:30,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:30,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:30,391 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:56:30,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 398 treesize of output 381 [2021-11-20 22:56:30,457 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-20 22:56:30,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 383 treesize of output 380 [2021-11-20 22:56:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:31,872 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:56:31,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 129 treesize of output 96 [2021-11-20 22:56:31,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:31,889 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:56:31,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 110 treesize of output 93 [2021-11-20 22:56:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:31,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:31,971 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-20 22:56:31,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:56:38,247 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:56:41,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:56:41,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 22:56:41,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-20 22:56:41,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014024949] [2021-11-20 22:56:41,992 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 22:56:41,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:56:41,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:56:41,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:56:41,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1129, Unknown=6, NotChecked=72, Total=1482 [2021-11-20 22:56:41,993 INFO L87 Difference]: Start difference. First operand 175 states and 191 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:56:43,323 INFO L93 Difference]: Finished difference Result 205 states and 224 transitions. [2021-11-20 22:56:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:56:43,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 22:56:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:56:43,325 INFO L225 Difference]: With dead ends: 205 [2021-11-20 22:56:43,325 INFO L226 Difference]: Without dead ends: 205 [2021-11-20 22:56:43,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=378, Invalid=1600, Unknown=6, NotChecked=86, Total=2070 [2021-11-20 22:56:43,327 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 308 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:56:43,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 343 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:56:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-20 22:56:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2021-11-20 22:56:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 161 states have (on average 1.360248447204969) internal successors, (219), 192 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 219 transitions. [2021-11-20 22:56:43,332 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 219 transitions. Word has length 36 [2021-11-20 22:56:43,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:56:43,333 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 219 transitions. [2021-11-20 22:56:43,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:56:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 219 transitions. [2021-11-20 22:56:43,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 22:56:43,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:56:43,334 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:56:43,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 22:56:43,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:43,549 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:56:43,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:56:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1341636589, now seen corresponding path program 1 times [2021-11-20 22:56:43,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:56:43,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700733294] [2021-11-20 22:56:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:43,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:56:43,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:56:43,612 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:56:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700733294] [2021-11-20 22:56:43,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700733294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:56:43,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985946041] [2021-11-20 22:56:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:56:43,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:56:43,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:56:43,614 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:56:43,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 22:56:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:56:43,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:56:43,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:56:43,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-11-20 22:56:43,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-20 22:56:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:56:43,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:56:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 22:56:43,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985946041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:56:43,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796302131] [2021-11-20 22:56:43,889 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-20 22:56:43,889 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:56:43,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:56:43,890 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:56:43,890 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:56:43,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:43,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:43,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:56:43,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:56:43,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:43,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 22:56:43,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:56:44,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:56:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 22:56:44,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:56:44,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 22:56:44,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 22:56:44,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 22:56:44,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-20 22:56:44,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,600 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 22:56:44,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-11-20 22:56:44,655 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:56:44,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-20 22:56:44,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-20 22:56:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,854 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:56:44,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-20 22:56:44,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,870 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:56:44,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:56:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:44,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 22:56:45,449 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:56:45,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 276 treesize of output 281 [2021-11-20 22:56:45,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:45,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:45,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:45,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:45,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:45,948 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:56:45,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 309 treesize of output 292 [2021-11-20 22:56:45,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:45,984 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:56:45,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 294 treesize of output 297 [2021-11-20 22:56:45,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:46,012 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:56:46,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 312 [2021-11-20 22:56:47,398 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-11-20 22:56:47,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 343 [2021-11-20 22:56:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:47,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:47,454 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:56:47,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 398 treesize of output 381 [2021-11-20 22:56:47,496 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-20 22:56:47,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 383 treesize of output 380 [2021-11-20 22:56:48,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:48,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:48,534 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:56:48,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-20 22:56:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:48,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:48,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:48,563 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:56:48,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:56:48,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:48,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:48,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:48,602 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:56:48,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:56:49,543 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:56:49,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 276 treesize of output 281 [2021-11-20 22:56:49,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:49,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:49,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:49,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:49,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:50,008 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:56:50,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 309 treesize of output 292 [2021-11-20 22:56:50,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:50,042 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:56:50,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 294 treesize of output 297 [2021-11-20 22:56:50,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:56:50,072 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:56:50,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 312 [2021-11-20 22:56:51,231 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-11-20 22:56:51,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 343 [2021-11-20 22:56:51,279 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-20 22:56:51,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 398 treesize of output 395 [2021-11-20 22:56:51,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:51,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:51,338 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:56:51,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 397 treesize of output 380 [2021-11-20 22:56:52,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:52,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:52,479 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-20 22:56:52,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:56:52,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:52,513 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:56:52,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 129 treesize of output 96 [2021-11-20 22:56:52,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:56:52,531 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:56:52,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 73 [2021-11-20 22:56:59,974 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:57:03,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:57:03,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:57:03,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2021-11-20 22:57:03,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380071995] [2021-11-20 22:57:03,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:57:03,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:57:03,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:57:03,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:57:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-11-20 22:57:03,878 INFO L87 Difference]: Start difference. First operand 193 states and 219 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:04,002 INFO L93 Difference]: Finished difference Result 217 states and 245 transitions. [2021-11-20 22:57:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:57:04,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 22:57:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:04,004 INFO L225 Difference]: With dead ends: 217 [2021-11-20 22:57:04,004 INFO L226 Difference]: Without dead ends: 217 [2021-11-20 22:57:04,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-11-20 22:57:04,005 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 143 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:04,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 358 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:57:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-20 22:57:04,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2021-11-20 22:57:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 179 states have (on average 1.3631284916201116) internal successors, (244), 210 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 244 transitions. [2021-11-20 22:57:04,011 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 244 transitions. Word has length 36 [2021-11-20 22:57:04,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:04,011 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 244 transitions. [2021-11-20 22:57:04,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:04,012 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 244 transitions. [2021-11-20 22:57:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 22:57:04,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:04,013 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:04,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:04,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:57:04,225 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:57:04,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:04,226 INFO L85 PathProgramCache]: Analyzing trace with hash 987749477, now seen corresponding path program 1 times [2021-11-20 22:57:04,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:57:04,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110877334] [2021-11-20 22:57:04,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:04,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:57:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 22:57:04,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:57:04,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110877334] [2021-11-20 22:57:04,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110877334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:04,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:04,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 22:57:04,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639039727] [2021-11-20 22:57:04,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:04,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:57:04,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:57:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:57:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:57:04,264 INFO L87 Difference]: Start difference. First operand 211 states and 244 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:04,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:04,318 INFO L93 Difference]: Finished difference Result 264 states and 302 transitions. [2021-11-20 22:57:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:57:04,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 22:57:04,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:04,327 INFO L225 Difference]: With dead ends: 264 [2021-11-20 22:57:04,327 INFO L226 Difference]: Without dead ends: 264 [2021-11-20 22:57:04,327 INFO L932 BasicCegarLoop]: 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 [2021-11-20 22:57:04,328 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 54 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:04,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 216 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:57:04,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-20 22:57:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 228. [2021-11-20 22:57:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 196 states have (on average 1.336734693877551) internal successors, (262), 227 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 262 transitions. [2021-11-20 22:57:04,337 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 262 transitions. Word has length 36 [2021-11-20 22:57:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:04,337 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 262 transitions. [2021-11-20 22:57:04,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 262 transitions. [2021-11-20 22:57:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 22:57:04,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:04,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:04,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-20 22:57:04,339 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:57:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:04,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1358906689, now seen corresponding path program 1 times [2021-11-20 22:57:04,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:57:04,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399726462] [2021-11-20 22:57:04,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:04,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:57:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:04,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:57:04,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399726462] [2021-11-20 22:57:04,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399726462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:57:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474418744] [2021-11-20 22:57:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:04,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:57:04,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:57:04,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:57:04,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 22:57:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:04,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 22:57:04,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:04,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:57:04,633 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:57:04,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 22:57:04,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:57:04,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:57:04,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-20 22:57:04,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:04,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-20 22:57:04,742 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:57:04,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 25 [2021-11-20 22:57:05,020 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:57:05,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-20 22:57:05,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:05,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:06,918 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~item~0#1.offset_140| Int) (v_DerPreprocessor_10 Int)) (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (store |c_#memory_$Pointer$.offset| .cse0 (store (store (select |c_#memory_$Pointer$.offset| .cse0) |v_ULTIMATE.start_main_~item~0#1.offset_140| 0) (+ 4 |v_ULTIMATE.start_main_~item~0#1.offset_140|) v_DerPreprocessor_10))) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)) is different from false [2021-11-20 22:57:06,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 674 treesize of output 658 [2021-11-20 22:57:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:08,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474418744] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:57:08,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1853565908] [2021-11-20 22:57:08,330 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2021-11-20 22:57:08,330 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:57:08,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:57:08,331 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:57:08,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:57:08,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:57:08,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:57:08,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 22:57:08,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:57:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:57:08,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-20 22:57:08,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:57:08,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 22:57:08,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 22:57:08,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 22:57:08,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-20 22:57:08,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:08,963 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 22:57:08,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2021-11-20 22:57:09,004 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:57:09,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-20 22:57:09,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:09,044 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-20 22:57:09,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-20 22:57:09,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:09,217 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:57:09,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 24 [2021-11-20 22:57:09,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:09,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:09,241 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:57:09,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:57:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:09,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:09,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:09,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-20 22:57:09,983 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:57:09,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 280 treesize of output 285 [2021-11-20 22:57:10,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:10,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:10,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:10,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:10,615 INFO L354 Elim1Store]: treesize reduction 106, result has 18.5 percent of original size [2021-11-20 22:57:10,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 319 treesize of output 302 [2021-11-20 22:57:10,651 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-20 22:57:10,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 304 treesize of output 294 [2021-11-20 22:57:10,691 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-20 22:57:10,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 296 [2021-11-20 22:57:11,582 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-11-20 22:57:11,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 461 treesize of output 350 [2021-11-20 22:57:11,624 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-11-20 22:57:11,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 408 treesize of output 389 [2021-11-20 22:57:11,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:11,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:11,683 INFO L354 Elim1Store]: treesize reduction 216, result has 16.0 percent of original size [2021-11-20 22:57:11,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 403 treesize of output 386 [2021-11-20 22:57:12,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:12,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:12,580 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-20 22:57:12,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 50 [2021-11-20 22:57:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:12,662 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:57:12,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 24 [2021-11-20 22:57:12,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:12,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:12,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:12,735 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:57:12,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:57:13,695 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:57:13,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 280 treesize of output 285 [2021-11-20 22:57:14,157 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-20 22:57:14,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 319 treesize of output 309 [2021-11-20 22:57:14,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:14,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:14,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:14,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:14,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:14,206 INFO L354 Elim1Store]: treesize reduction 106, result has 18.5 percent of original size [2021-11-20 22:57:14,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 308 treesize of output 291 [2021-11-20 22:57:14,243 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-20 22:57:14,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 296 [2021-11-20 22:57:15,230 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-11-20 22:57:15,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 461 treesize of output 350 [2021-11-20 22:57:15,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:15,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:15,288 INFO L354 Elim1Store]: treesize reduction 216, result has 16.0 percent of original size [2021-11-20 22:57:15,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 408 treesize of output 391 [2021-11-20 22:57:15,330 INFO L354 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2021-11-20 22:57:15,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 393 treesize of output 374 [2021-11-20 22:57:16,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:16,088 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-20 22:57:16,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 24 [2021-11-20 22:57:16,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:16,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:16,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:16,120 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:57:16,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:57:16,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:16,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:16,151 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 22:57:16,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-20 22:57:23,119 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:57:27,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:57:27,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:57:27,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2021-11-20 22:57:27,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537672184] [2021-11-20 22:57:27,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:57:27,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 22:57:27,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:57:27,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 22:57:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1080, Unknown=2, NotChecked=70, Total=1406 [2021-11-20 22:57:27,744 INFO L87 Difference]: Start difference. First operand 228 states and 262 transitions. Second operand has 22 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:28,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:28,731 INFO L93 Difference]: Finished difference Result 233 states and 267 transitions. [2021-11-20 22:57:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 22:57:28,738 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 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 37 [2021-11-20 22:57:28,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:28,740 INFO L225 Difference]: With dead ends: 233 [2021-11-20 22:57:28,740 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 22:57:28,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 67 SyntacticMatches, 18 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=406, Invalid=1665, Unknown=3, NotChecked=88, Total=2162 [2021-11-20 22:57:28,741 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 87 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:28,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 912 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 331 Invalid, 0 Unknown, 304 Unchecked, 0.2s Time] [2021-11-20 22:57:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 22:57:28,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2021-11-20 22:57:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 197 states have (on average 1.3350253807106598) internal successors, (263), 228 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 263 transitions. [2021-11-20 22:57:28,746 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 263 transitions. Word has length 37 [2021-11-20 22:57:28,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:28,747 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 263 transitions. [2021-11-20 22:57:28,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 263 transitions. [2021-11-20 22:57:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 22:57:28,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:28,747 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:28,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 22:57:28,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 22:57:28,948 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:57:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1587622470, now seen corresponding path program 1 times [2021-11-20 22:57:28,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:57:28,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547367686] [2021-11-20 22:57:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:28,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:57:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:29,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:57:29,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547367686] [2021-11-20 22:57:29,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547367686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:57:29,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364300782] [2021-11-20 22:57:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:29,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:57:29,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:57:29,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:57:29,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 22:57:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 22:57:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:29,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:57:29,402 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:57:29,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 22:57:29,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:57:29,516 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:57:29,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-20 22:57:29,576 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 22:57:29,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-20 22:57:29,676 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:57:29,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-20 22:57:29,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 30 treesize of output 25 [2021-11-20 22:57:29,808 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-11-20 22:57:29,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 48 [2021-11-20 22:57:29,935 INFO L354 Elim1Store]: treesize reduction 120, result has 21.1 percent of original size [2021-11-20 22:57:29,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 57 [2021-11-20 22:57:30,277 INFO L354 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2021-11-20 22:57:30,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 74 [2021-11-20 22:57:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:30,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:35,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23047 treesize of output 22791 [2021-11-20 22:57:36,468 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 22:57:36,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22115 treesize of output 22114 [2021-11-20 22:57:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:37,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364300782] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:57:37,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1457420733] [2021-11-20 22:57:37,892 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-20 22:57:37,893 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:57:37,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:57:37,893 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:57:37,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:57:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:37,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:37,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:57:37,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:57:37,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:37,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-20 22:57:37,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-20 22:57:38,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:57:38,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:57:38,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-20 22:57:38,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-20 22:57:38,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-20 22:57:38,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-11-20 22:57:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2021-11-20 22:57:38,550 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:57:38,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2021-11-20 22:57:38,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 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 [2021-11-20 22:57:38,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-20 22:57:38,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-20 22:57:38,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-11-20 22:57:38,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:38,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-20 22:57:39,579 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-20 22:57:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 276 treesize of output 281 [2021-11-20 22:57:40,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:40,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:40,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:40,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:40,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:40,190 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-20 22:57:40,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 309 treesize of output 292 [2021-11-20 22:57:40,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:40,213 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-20 22:57:40,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 294 treesize of output 288 [2021-11-20 22:57:40,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:40,242 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-11-20 22:57:40,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 283 treesize of output 286 [2021-11-20 22:57:41,232 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-11-20 22:57:41,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 431 treesize of output 343 [2021-11-20 22:57:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:41,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:41,288 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 22:57:41,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 398 treesize of output 381 [2021-11-20 22:57:41,337 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-11-20 22:57:41,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 383 treesize of output 384 [2021-11-20 22:57:42,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:42,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:42,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:42,921 INFO L354 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2021-11-20 22:57:42,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 204 treesize of output 165 [2021-11-20 22:57:42,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:42,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:42,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:42,962 INFO L354 Elim1Store]: treesize reduction 120, result has 16.1 percent of original size [2021-11-20 22:57:42,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 185 treesize of output 193 [2021-11-20 22:57:42,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:42,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:42,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 22:57:42,984 INFO L354 Elim1Store]: treesize reduction 87, result has 11.2 percent of original size [2021-11-20 22:57:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 181 treesize of output 171 [2021-11-20 22:57:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:43,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:43,233 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-20 22:57:43,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2021-11-20 22:57:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:43,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:43,262 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:57:43,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2021-11-20 22:57:43,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:43,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:43,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 30 [2021-11-20 22:57:43,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:57:43,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:57:43,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:57:43,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 22:57:43,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:57:43,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:57:43,856 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 22:57:43,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 83 [2021-11-20 22:57:43,871 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:57:43,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 70 [2021-11-20 22:57:44,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:44,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:44,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:57:44,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:44,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:57:44,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:44,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:44,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:57:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:44,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:57:44,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:57:44,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 22:57:45,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:57:45,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:57:45,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-20 22:57:45,274 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:57:45,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 87 [2021-11-20 22:57:45,317 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 22:57:45,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2021-11-20 22:57:45,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 22:57:45,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:57:45,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:57:45,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-20 22:57:45,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 22:57:45,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:57:45,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:57:46,385 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:57:47,996 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:57:47,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:57:47,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 37 [2021-11-20 22:57:47,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080724336] [2021-11-20 22:57:47,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:57:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 22:57:47,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:57:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 22:57:47,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=2815, Unknown=2, NotChecked=0, Total=3080 [2021-11-20 22:57:47,999 INFO L87 Difference]: Start difference. First operand 229 states and 263 transitions. Second operand has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:51,490 INFO L93 Difference]: Finished difference Result 257 states and 287 transitions. [2021-11-20 22:57:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 22:57:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 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 37 [2021-11-20 22:57:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:51,493 INFO L225 Difference]: With dead ends: 257 [2021-11-20 22:57:51,493 INFO L226 Difference]: Without dead ends: 257 [2021-11-20 22:57:51,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=538, Invalid=4288, Unknown=4, NotChecked=0, Total=4830 [2021-11-20 22:57:51,495 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 321 mSDsluCounter, 1089 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 444 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:51,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 1159 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 594 Invalid, 0 Unknown, 444 Unchecked, 0.4s Time] [2021-11-20 22:57:51,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-11-20 22:57:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 249. [2021-11-20 22:57:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 217 states have (on average 1.3087557603686637) internal successors, (284), 248 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 284 transitions. [2021-11-20 22:57:51,503 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 284 transitions. Word has length 37 [2021-11-20 22:57:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:51,504 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 284 transitions. [2021-11-20 22:57:51,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5405405405405403) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 284 transitions. [2021-11-20 22:57:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 22:57:51,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:51,506 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:51,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:51,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:57:51,729 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:57:51,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:51,729 INFO L85 PathProgramCache]: Analyzing trace with hash -823565154, now seen corresponding path program 1 times [2021-11-20 22:57:51,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:57:51,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336274494] [2021-11-20 22:57:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:51,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:57:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:51,775 ERROR L253 erpolLogProxyWrapper]: Interpolant 6 not inductive [2021-11-20 22:57:51,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-20 22:57:51,807 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:876) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:343) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:198) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:283) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:296) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-20 22:57:51,816 INFO L158 Benchmark]: Toolchain (without parser) took 387869.31ms. Allocated memory was 83.9MB in the beginning and 408.9MB in the end (delta: 325.1MB). Free memory was 45.8MB in the beginning and 267.4MB in the end (delta: -221.6MB). Peak memory consumption was 102.5MB. Max. memory is 16.1GB. [2021-11-20 22:57:51,816 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory was 63.9MB in the beginning and 63.8MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 22:57:51,817 INFO L158 Benchmark]: CACSL2BoogieTranslator took 550.07ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 45.6MB in the beginning and 72.4MB in the end (delta: -26.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 22:57:51,817 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.97ms. Allocated memory is still 107.0MB. Free memory was 72.4MB in the beginning and 70.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 22:57:51,817 INFO L158 Benchmark]: Boogie Preprocessor took 39.56ms. Allocated memory is still 107.0MB. Free memory was 70.0MB in the beginning and 67.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 22:57:51,817 INFO L158 Benchmark]: RCFGBuilder took 757.03ms. Allocated memory is still 107.0MB. Free memory was 67.9MB in the beginning and 43.5MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-20 22:57:51,818 INFO L158 Benchmark]: TraceAbstraction took 386465.13ms. Allocated memory was 107.0MB in the beginning and 408.9MB in the end (delta: 302.0MB). Free memory was 43.0MB in the beginning and 267.4MB in the end (delta: -224.4MB). Peak memory consumption was 79.4MB. Max. memory is 16.1GB. [2021-11-20 22:57:51,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 83.9MB. Free memory was 63.9MB in the beginning and 63.8MB in the end (delta: 84.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 550.07ms. Allocated memory was 83.9MB in the beginning and 107.0MB in the end (delta: 23.1MB). Free memory was 45.6MB in the beginning and 72.4MB in the end (delta: -26.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.97ms. Allocated memory is still 107.0MB. Free memory was 72.4MB in the beginning and 70.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.56ms. Allocated memory is still 107.0MB. Free memory was 70.0MB in the beginning and 67.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 757.03ms. Allocated memory is still 107.0MB. Free memory was 67.9MB in the beginning and 43.5MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 386465.13ms. Allocated memory was 107.0MB in the beginning and 408.9MB in the end (delta: 302.0MB). Free memory was 43.0MB in the beginning and 267.4MB in the end (delta: -224.4MB). Peak memory consumption was 79.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-20 22:57:51,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-queue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash af4a0e4f738e916feae01fb2c2f056f4ba7834b8a7b8d69765614c5417c16c63 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:57:54,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:57:54,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:57:54,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:57:54,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:57:54,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:57:54,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:57:54,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:57:54,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:57:54,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:57:54,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:57:54,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:57:54,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:57:54,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:57:54,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:57:54,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:57:54,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:57:54,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:57:54,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:57:54,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:57:54,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:57:54,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:57:54,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:57:54,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:57:54,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:57:54,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:57:54,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:57:54,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:57:54,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:57:54,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:57:54,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:57:54,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:57:54,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:57:54,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:57:54,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:57:54,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:57:54,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:57:54,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:57:54,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:57:54,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:57:54,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:57:54,295 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2021-11-20 22:57:54,338 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:57:54,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:57:54,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:57:54,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:57:54,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:57:54,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:57:54,340 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:57:54,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:57:54,340 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:57:54,340 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:57:54,340 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:57:54,340 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:57:54,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 22:57:54,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 22:57:54,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:57:54,342 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:57:54,342 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 22:57:54,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:57:54,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:57:54,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:57:54,342 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 22:57:54,343 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 22:57:54,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:57:54,343 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 22:57:54,343 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 22:57:54,343 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 22:57:54,343 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:57:54,343 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:57:54,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:57:54,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 22:57:54,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:57:54,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:57:54,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:57:54,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:57:54,344 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-20 22:57:54,345 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 22:57:54,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:57:54,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:57:54,345 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af4a0e4f738e916feae01fb2c2f056f4ba7834b8a7b8d69765614c5417c16c63 [2021-11-20 22:57:54,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:57:54,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:57:54,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:57:54,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:57:54,769 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:57:54,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/forester-heap/sll-queue-2.i [2021-11-20 22:57:54,837 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data/b66193d49/ed517694c88941ff9ed57072ee1a6a35/FLAG1b7036483 [2021-11-20 22:57:55,363 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:57:55,364 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i [2021-11-20 22:57:55,379 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data/b66193d49/ed517694c88941ff9ed57072ee1a6a35/FLAG1b7036483 [2021-11-20 22:57:55,668 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/data/b66193d49/ed517694c88941ff9ed57072ee1a6a35 [2021-11-20 22:57:55,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:57:55,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:57:55,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:57:55,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:57:55,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:57:55,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:57:55" (1/1) ... [2021-11-20 22:57:55,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a2be0cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:55, skipping insertion in model container [2021-11-20 22:57:55,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:57:55" (1/1) ... [2021-11-20 22:57:55,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:57:55,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:57:56,112 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2021-11-20 22:57:56,115 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2021-11-20 22:57:56,116 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2021-11-20 22:57:56,117 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2021-11-20 22:57:56,119 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2021-11-20 22:57:56,120 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2021-11-20 22:57:56,121 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2021-11-20 22:57:56,122 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2021-11-20 22:57:56,123 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2021-11-20 22:57:56,124 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2021-11-20 22:57:56,126 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2021-11-20 22:57:56,127 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2021-11-20 22:57:56,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2021-11-20 22:57:56,131 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2021-11-20 22:57:56,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:57:56,148 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:57:56,188 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2021-11-20 22:57:56,189 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2021-11-20 22:57:56,190 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2021-11-20 22:57:56,191 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2021-11-20 22:57:56,192 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2021-11-20 22:57:56,193 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2021-11-20 22:57:56,194 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2021-11-20 22:57:56,195 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2021-11-20 22:57:56,196 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2021-11-20 22:57:56,197 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2021-11-20 22:57:56,198 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2021-11-20 22:57:56,199 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2021-11-20 22:57:56,201 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2021-11-20 22:57:56,202 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2021-11-20 22:57:56,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:57:56,239 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:57:56,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56 WrapperNode [2021-11-20 22:57:56,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:57:56,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:57:56,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:57:56,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:57:56,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,298 INFO L137 Inliner]: procedures = 122, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 216 [2021-11-20 22:57:56,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:57:56,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:57:56,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:57:56,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:57:56,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:57:56,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:57:56,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:57:56,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:57:56,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (1/1) ... [2021-11-20 22:57:56,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:57:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:57:56,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:57:56,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:57:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-20 22:57:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 22:57:56,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:57:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 22:57:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 22:57:56,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 22:57:56,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-20 22:57:56,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 22:57:56,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:57:56,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:57:56,606 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:57:56,608 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:57:57,226 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:57:57,234 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:57:57,234 INFO L301 CfgBuilder]: Removed 31 assume(true) statements. [2021-11-20 22:57:57,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:57:57 BoogieIcfgContainer [2021-11-20 22:57:57,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:57:57,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:57:57,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:57:57,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:57:57,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:57:55" (1/3) ... [2021-11-20 22:57:57,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2324854d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:57:57, skipping insertion in model container [2021-11-20 22:57:57,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:56" (2/3) ... [2021-11-20 22:57:57,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2324854d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:57:57, skipping insertion in model container [2021-11-20 22:57:57,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:57:57" (3/3) ... [2021-11-20 22:57:57,244 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-queue-2.i [2021-11-20 22:57:57,249 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:57:57,249 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2021-11-20 22:57:57,295 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:57:57,301 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:57:57,302 INFO L340 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2021-11-20 22:57:57,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 168 states, 97 states have (on average 2.288659793814433) internal successors, (222), 167 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:57,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 22:57:57,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:57,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 22:57:57,328 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:57:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:57,334 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-20 22:57:57,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:57,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599050107] [2021-11-20 22:57:57,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:57,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:57,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:57,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:57,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 22:57:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:57,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:57:57,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:57,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:57:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:57,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:57,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:57,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599050107] [2021-11-20 22:57:57,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599050107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:57,544 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:57,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 22:57:57,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608042618] [2021-11-20 22:57:57,547 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:57,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:57:57,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:57,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:57:57,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:57:57,581 INFO L87 Difference]: Start difference. First operand has 168 states, 97 states have (on average 2.288659793814433) internal successors, (222), 167 states have internal predecessors, (222), 0 states have call successors, (0), 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 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:57,950 INFO L93 Difference]: Finished difference Result 166 states and 175 transitions. [2021-11-20 22:57:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:57:57,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-20 22:57:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:57,962 INFO L225 Difference]: With dead ends: 166 [2021-11-20 22:57:57,963 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 22:57:57,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:57:57,968 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 156 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:57,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 105 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:57:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 22:57:58,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2021-11-20 22:57:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 98 states have (on average 1.7244897959183674) internal successors, (169), 157 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 169 transitions. [2021-11-20 22:57:58,015 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 169 transitions. Word has length 3 [2021-11-20 22:57:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:58,016 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 169 transitions. [2021-11-20 22:57:58,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 169 transitions. [2021-11-20 22:57:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-20 22:57:58,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:58,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-20 22:57:58,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:58,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:58,232 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:57:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:58,233 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-20 22:57:58,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:58,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020318911] [2021-11-20 22:57:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:58,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:58,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:58,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:58,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 22:57:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:57:58,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:58,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:57:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:58,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:58,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:58,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020318911] [2021-11-20 22:57:58,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020318911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:58,442 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:58,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-20 22:57:58,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499143574] [2021-11-20 22:57:58,443 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:58,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:57:58,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:58,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:57:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:57:58,448 INFO L87 Difference]: Start difference. First operand 158 states and 169 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:58,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:58,782 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2021-11-20 22:57:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:57:58,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-20 22:57:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:58,786 INFO L225 Difference]: With dead ends: 152 [2021-11-20 22:57:58,786 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 22:57:58,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:57:58,790 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 286 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:58,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 108 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:57:58,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 22:57:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-11-20 22:57:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 98 states have (on average 1.6122448979591837) internal successors, (158), 147 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 158 transitions. [2021-11-20 22:57:58,817 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 158 transitions. Word has length 3 [2021-11-20 22:57:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:58,818 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 158 transitions. [2021-11-20 22:57:58,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:58,818 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 158 transitions. [2021-11-20 22:57:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 22:57:58,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:58,819 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:58,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:59,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:59,021 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:57:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:59,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1803027173, now seen corresponding path program 1 times [2021-11-20 22:57:59,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:59,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013105887] [2021-11-20 22:57:59,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:59,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:59,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:59,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:59,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 22:57:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:59,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 22:57:59,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:59,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:57:59,207 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 22:57:59,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 22:57:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:59,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:57:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:57:59,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:57:59,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013105887] [2021-11-20 22:57:59,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013105887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:57:59,307 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:57:59,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 22:57:59,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635701949] [2021-11-20 22:57:59,308 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:57:59,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:57:59,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:57:59,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:57:59,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:57:59,310 INFO L87 Difference]: Start difference. First operand 148 states and 158 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:59,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:57:59,605 INFO L93 Difference]: Finished difference Result 158 states and 167 transitions. [2021-11-20 22:57:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:57:59,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-20 22:57:59,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:57:59,607 INFO L225 Difference]: With dead ends: 158 [2021-11-20 22:57:59,608 INFO L226 Difference]: Without dead ends: 158 [2021-11-20 22:57:59,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:57:59,609 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 256 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:57:59,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 108 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:57:59,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-20 22:57:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-11-20 22:57:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 105 states have (on average 1.561904761904762) internal successors, (164), 149 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:59,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 164 transitions. [2021-11-20 22:57:59,635 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 164 transitions. Word has length 7 [2021-11-20 22:57:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:57:59,635 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 164 transitions. [2021-11-20 22:57:59,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:57:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 164 transitions. [2021-11-20 22:57:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 22:57:59,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:57:59,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:57:59,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:57:59,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:57:59,854 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:57:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:57:59,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1803027174, now seen corresponding path program 1 times [2021-11-20 22:57:59,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:57:59,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401214193] [2021-11-20 22:57:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:57:59,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:57:59,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:57:59,857 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:57:59,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 22:57:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:57:59,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:57:59,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:57:59,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:57:59,999 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 22:58:00,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 22:58:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:00,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:00,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:00,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:00,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401214193] [2021-11-20 22:58:00,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401214193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:00,347 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:00,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-20 22:58:00,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539002773] [2021-11-20 22:58:00,348 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:00,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:58:00,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:00,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:58:00,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:58:00,354 INFO L87 Difference]: Start difference. First operand 150 states and 164 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:01,019 INFO L93 Difference]: Finished difference Result 263 states and 285 transitions. [2021-11-20 22:58:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:58:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 22:58:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:01,024 INFO L225 Difference]: With dead ends: 263 [2021-11-20 22:58:01,024 INFO L226 Difference]: Without dead ends: 263 [2021-11-20 22:58:01,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 22:58:01,025 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 497 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:01,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 284 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 147 Invalid, 0 Unknown, 129 Unchecked, 0.6s Time] [2021-11-20 22:58:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-20 22:58:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 208. [2021-11-20 22:58:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 164 states have (on average 1.5914634146341464) internal successors, (261), 207 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 261 transitions. [2021-11-20 22:58:01,046 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 261 transitions. Word has length 7 [2021-11-20 22:58:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:01,046 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 261 transitions. [2021-11-20 22:58:01,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:01,047 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 261 transitions. [2021-11-20 22:58:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 22:58:01,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:01,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:01,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:01,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:01,253 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash 59268142, now seen corresponding path program 1 times [2021-11-20 22:58:01,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:01,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737682458] [2021-11-20 22:58:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:01,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:01,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:01,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:01,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 22:58:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:01,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:58:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:01,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:01,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:01,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737682458] [2021-11-20 22:58:01,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737682458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:01,376 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:01,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 22:58:01,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312856583] [2021-11-20 22:58:01,376 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:01,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:58:01,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:58:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:58:01,378 INFO L87 Difference]: Start difference. First operand 208 states and 261 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) [2021-11-20 22:58:01,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:01,444 INFO L93 Difference]: Finished difference Result 198 states and 245 transitions. [2021-11-20 22:58:01,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:58:01,444 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 [2021-11-20 22:58:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:01,446 INFO L225 Difference]: With dead ends: 198 [2021-11-20 22:58:01,446 INFO L226 Difference]: Without dead ends: 198 [2021-11-20 22:58:01,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:58:01,447 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 121 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:01,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 130 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:58:01,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-20 22:58:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-20 22:58:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 159 states have (on average 1.5408805031446542) internal successors, (245), 197 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 245 transitions. [2021-11-20 22:58:01,469 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 245 transitions. Word has length 8 [2021-11-20 22:58:01,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:01,470 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 245 transitions. [2021-11-20 22:58:01,470 INFO L471 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) [2021-11-20 22:58:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 245 transitions. [2021-11-20 22:58:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:58:01,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:01,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:01,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:01,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:01,685 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:01,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:01,686 INFO L85 PathProgramCache]: Analyzing trace with hash 406735527, now seen corresponding path program 1 times [2021-11-20 22:58:01,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:01,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683227943] [2021-11-20 22:58:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:01,687 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:01,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:01,688 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:01,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 22:58:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:01,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:58:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:01,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:58:01,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:58:01,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-20 22:58:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:01,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:01,926 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:01,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683227943] [2021-11-20 22:58:01,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683227943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:01,927 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:01,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 22:58:01,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301934640] [2021-11-20 22:58:01,927 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:01,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:01,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:01,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:01,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:01,928 INFO L87 Difference]: Start difference. First operand 198 states and 245 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:02,560 INFO L93 Difference]: Finished difference Result 228 states and 252 transitions. [2021-11-20 22:58:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 22:58:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 22:58:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:02,563 INFO L225 Difference]: With dead ends: 228 [2021-11-20 22:58:02,563 INFO L226 Difference]: Without dead ends: 228 [2021-11-20 22:58:02,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:58:02,564 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 107 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:02,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 656 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 22:58:02,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-20 22:58:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 197. [2021-11-20 22:58:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 159 states have (on average 1.5345911949685536) internal successors, (244), 196 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 244 transitions. [2021-11-20 22:58:02,589 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 244 transitions. Word has length 11 [2021-11-20 22:58:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:02,589 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 244 transitions. [2021-11-20 22:58:02,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 244 transitions. [2021-11-20 22:58:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 22:58:02,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:02,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:02,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:02,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:02,806 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:02,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:02,807 INFO L85 PathProgramCache]: Analyzing trace with hash 406735528, now seen corresponding path program 1 times [2021-11-20 22:58:02,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:02,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135658805] [2021-11-20 22:58:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:02,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:02,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:02,808 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:02,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 22:58:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:02,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:58:02,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:02,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:58:02,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 22:58:02,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:02,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-11-20 22:58:02,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-20 22:58:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:02,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:03,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:03,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135658805] [2021-11-20 22:58:03,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135658805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:03,329 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:03,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-20 22:58:03,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179389339] [2021-11-20 22:58:03,329 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:03,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 22:58:03,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:03,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 22:58:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:58:03,330 INFO L87 Difference]: Start difference. First operand 197 states and 244 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:04,878 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2021-11-20 22:58:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 22:58:04,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 22:58:04,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:04,881 INFO L225 Difference]: With dead ends: 223 [2021-11-20 22:58:04,881 INFO L226 Difference]: Without dead ends: 223 [2021-11-20 22:58:04,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:58:04,882 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 100 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:04,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 713 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-20 22:58:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-20 22:58:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 191. [2021-11-20 22:58:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 158 states have (on average 1.5063291139240507) internal successors, (238), 190 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 238 transitions. [2021-11-20 22:58:04,889 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 238 transitions. Word has length 11 [2021-11-20 22:58:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:04,890 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 238 transitions. [2021-11-20 22:58:04,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 238 transitions. [2021-11-20 22:58:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 22:58:04,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:04,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:04,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:05,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:05,103 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:05,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1469737219, now seen corresponding path program 1 times [2021-11-20 22:58:05,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:05,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215931383] [2021-11-20 22:58:05,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:05,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:05,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:05,112 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:05,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 22:58:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:05,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:58:05,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:05,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:05,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:05,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215931383] [2021-11-20 22:58:05,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215931383] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:05,266 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:05,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-20 22:58:05,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189718653] [2021-11-20 22:58:05,267 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:05,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:58:05,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:05,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:58:05,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:58:05,269 INFO L87 Difference]: Start difference. First operand 191 states and 238 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:05,311 INFO L93 Difference]: Finished difference Result 244 states and 273 transitions. [2021-11-20 22:58:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 22:58:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 22:58:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:05,314 INFO L225 Difference]: With dead ends: 244 [2021-11-20 22:58:05,314 INFO L226 Difference]: Without dead ends: 244 [2021-11-20 22:58:05,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:58:05,315 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 152 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:05,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 317 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:58:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-20 22:58:05,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 178. [2021-11-20 22:58:05,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 145 states have (on average 1.4068965517241379) internal successors, (204), 177 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:05,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 204 transitions. [2021-11-20 22:58:05,323 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 204 transitions. Word has length 14 [2021-11-20 22:58:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:05,323 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 204 transitions. [2021-11-20 22:58:05,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:05,323 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 204 transitions. [2021-11-20 22:58:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 22:58:05,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:05,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:05,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:05,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:05,542 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:05,542 INFO L85 PathProgramCache]: Analyzing trace with hash -529144660, now seen corresponding path program 1 times [2021-11-20 22:58:05,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:05,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145644598] [2021-11-20 22:58:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:05,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:05,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:05,544 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:05,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 22:58:05,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:58:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:05,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:05,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:05,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145644598] [2021-11-20 22:58:05,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145644598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:05,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:05,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 22:58:05,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269890481] [2021-11-20 22:58:05,724 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:05,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 22:58:05,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:05,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 22:58:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 22:58:05,726 INFO L87 Difference]: Start difference. First operand 178 states and 204 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:05,771 INFO L93 Difference]: Finished difference Result 191 states and 209 transitions. [2021-11-20 22:58:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:58:05,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-20 22:58:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:05,773 INFO L225 Difference]: With dead ends: 191 [2021-11-20 22:58:05,774 INFO L226 Difference]: Without dead ends: 191 [2021-11-20 22:58:05,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:58:05,777 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 31 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:05,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 361 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:58:05,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-20 22:58:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 173. [2021-11-20 22:58:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 140 states have (on average 1.3714285714285714) internal successors, (192), 172 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2021-11-20 22:58:05,784 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 17 [2021-11-20 22:58:05,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:05,785 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2021-11-20 22:58:05,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:05,785 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2021-11-20 22:58:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 22:58:05,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:05,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:05,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:05,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:05,997 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:05,998 INFO L85 PathProgramCache]: Analyzing trace with hash 271532674, now seen corresponding path program 1 times [2021-11-20 22:58:05,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:05,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254852883] [2021-11-20 22:58:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:05,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:05,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:05,999 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:06,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 22:58:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:06,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:58:06,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:06,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:58:06,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-20 22:58:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:06,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:06,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:06,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254852883] [2021-11-20 22:58:06,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254852883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:06,219 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:06,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-20 22:58:06,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219304556] [2021-11-20 22:58:06,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:06,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 22:58:06,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 22:58:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 22:58:06,221 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:06,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:06,476 INFO L93 Difference]: Finished difference Result 171 states and 189 transitions. [2021-11-20 22:58:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 22:58:06,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 22:58:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:06,478 INFO L225 Difference]: With dead ends: 171 [2021-11-20 22:58:06,479 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 22:58:06,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:58:06,480 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 89 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:06,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 515 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:58:06,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 22:58:06,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-20 22:58:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 139 states have (on average 1.3597122302158273) internal successors, (189), 170 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:06,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2021-11-20 22:58:06,486 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 18 [2021-11-20 22:58:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:06,486 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2021-11-20 22:58:06,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2021-11-20 22:58:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 22:58:06,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:06,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:06,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:06,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:06,699 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:06,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:06,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1721073736, now seen corresponding path program 1 times [2021-11-20 22:58:06,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:06,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544383808] [2021-11-20 22:58:06,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:06,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:06,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:06,701 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:06,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 22:58:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:06,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 22:58:06,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:06,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:06,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:06,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544383808] [2021-11-20 22:58:06,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544383808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:06,997 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:06,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-20 22:58:06,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996799856] [2021-11-20 22:58:06,998 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:06,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:58:06,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:06,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:58:06,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:58:06,999 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:07,368 INFO L93 Difference]: Finished difference Result 176 states and 192 transitions. [2021-11-20 22:58:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 22:58:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-20 22:58:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:07,371 INFO L225 Difference]: With dead ends: 176 [2021-11-20 22:58:07,372 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 22:58:07,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:58:07,373 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 269 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:07,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 287 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 22:58:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 22:58:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 171. [2021-11-20 22:58:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 139 states have (on average 1.3525179856115108) internal successors, (188), 170 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2021-11-20 22:58:07,388 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 19 [2021-11-20 22:58:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:07,388 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2021-11-20 22:58:07,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2021-11-20 22:58:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 22:58:07,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:07,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:07,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:07,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:07,596 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1701915074, now seen corresponding path program 1 times [2021-11-20 22:58:07,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:07,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64556979] [2021-11-20 22:58:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:07,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:07,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:07,597 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:07,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 22:58:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:58:07,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:07,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:07,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:07,709 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 22:58:07,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:58:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:07,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:58:07,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 22:58:07,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-20 22:58:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:07,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:07,976 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:07,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64556979] [2021-11-20 22:58:07,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64556979] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:07,977 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:07,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 22:58:07,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335967284] [2021-11-20 22:58:07,977 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:07,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 22:58:07,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 22:58:07,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 22:58:07,979 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:08,170 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2021-11-20 22:58:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 22:58:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 19 [2021-11-20 22:58:08,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:08,171 INFO L225 Difference]: With dead ends: 165 [2021-11-20 22:58:08,171 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 22:58:08,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 22:58:08,172 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 5 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:08,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 438 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:58:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 22:58:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-11-20 22:58:08,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 133 states have (on average 1.3458646616541354) internal successors, (179), 164 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-11-20 22:58:08,178 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 19 [2021-11-20 22:58:08,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:08,178 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-11-20 22:58:08,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:08,178 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-11-20 22:58:08,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 22:58:08,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:08,179 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:08,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:08,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:08,390 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:08,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:08,391 INFO L85 PathProgramCache]: Analyzing trace with hash 812348068, now seen corresponding path program 1 times [2021-11-20 22:58:08,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:08,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467801175] [2021-11-20 22:58:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:08,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:08,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:08,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:08,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 22:58:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 22:58:08,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:08,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:08,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:08,519 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 22:58:08,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:58:08,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:08,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2021-11-20 22:58:08,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 22:58:08,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-20 22:58:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:08,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:08,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467801175] [2021-11-20 22:58:08,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467801175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [96849953] [2021-11-20 22:58:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:08,842 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:58:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:58:08,846 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:58:08,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-20 22:58:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:08,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 22:58:08,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:08,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:08,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:09,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:09,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:58:09,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:09,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:58:09,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 22:58:09,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-20 22:58:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:09,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:09,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [96849953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:09,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223054282] [2021-11-20 22:58:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:09,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:09,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:58:09,375 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:58:09,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 22:58:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:09,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:58:09,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:09,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:09,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 22:58:09,484 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 22:58:09,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-20 22:58:09,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:58:09,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 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 [2021-11-20 22:58:09,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 22:58:09,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-20 22:58:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:09,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:09,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223054282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:09,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:58:09,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 6, 5] total 8 [2021-11-20 22:58:09,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668038092] [2021-11-20 22:58:09,834 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:58:09,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 22:58:09,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:09,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 22:58:09,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 22:58:09,835 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:10,112 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2021-11-20 22:58:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:58:10,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 22:58:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:10,114 INFO L225 Difference]: With dead ends: 168 [2021-11-20 22:58:10,114 INFO L226 Difference]: Without dead ends: 168 [2021-11-20 22:58:10,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 22:58:10,115 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 140 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:10,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 424 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:58:10,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-20 22:58:10,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-20 22:58:10,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 136 states have (on average 1.338235294117647) internal successors, (182), 167 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 182 transitions. [2021-11-20 22:58:10,120 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 182 transitions. Word has length 22 [2021-11-20 22:58:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:10,120 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 182 transitions. [2021-11-20 22:58:10,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 182 transitions. [2021-11-20 22:58:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 22:58:10,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:10,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:10,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:10,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:10,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:10,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:10,725 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash -587014801, now seen corresponding path program 1 times [2021-11-20 22:58:10,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:10,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485881486] [2021-11-20 22:58:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:10,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:10,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:10,727 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:10,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 22:58:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:10,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:58:10,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:10,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:11,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:11,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485881486] [2021-11-20 22:58:11,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485881486] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:11,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2052822285] [2021-11-20 22:58:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:11,070 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:58:11,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:58:11,071 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:58:11,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-20 22:58:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 22:58:11,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:11,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:11,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2052822285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:11,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752347198] [2021-11-20 22:58:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:11,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:11,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:58:11,543 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:58:11,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 22:58:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:11,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:58:11,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:11,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:11,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752347198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:11,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:58:11,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 11 [2021-11-20 22:58:11,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323672734] [2021-11-20 22:58:11,859 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:58:11,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 22:58:11,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:11,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 22:58:11,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-20 22:58:11,861 INFO L87 Difference]: Start difference. First operand 168 states and 182 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:12,503 INFO L93 Difference]: Finished difference Result 170 states and 183 transitions. [2021-11-20 22:58:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 22:58:12,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-20 22:58:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:12,505 INFO L225 Difference]: With dead ends: 170 [2021-11-20 22:58:12,505 INFO L226 Difference]: Without dead ends: 153 [2021-11-20 22:58:12,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-11-20 22:58:12,506 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 163 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:12,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 481 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 293 Invalid, 0 Unknown, 2 Unchecked, 0.5s Time] [2021-11-20 22:58:12,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-20 22:58:12,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2021-11-20 22:58:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 121 states have (on average 1.371900826446281) internal successors, (166), 152 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 166 transitions. [2021-11-20 22:58:12,511 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 166 transitions. Word has length 23 [2021-11-20 22:58:12,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:12,511 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 166 transitions. [2021-11-20 22:58:12,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:12,512 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 166 transitions. [2021-11-20 22:58:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 22:58:12,512 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:12,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:12,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:12,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:12,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:13,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:13,131 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1469175391, now seen corresponding path program 1 times [2021-11-20 22:58:13,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:13,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313118215] [2021-11-20 22:58:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:13,132 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:13,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:13,139 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:13,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 22:58:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 22:58:13,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:13,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:58:13,306 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:58:13,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-20 22:58:13,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:58:13,483 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:58:13,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-20 22:58:13,566 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:58:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 44 [2021-11-20 22:58:13,775 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:58:13,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2021-11-20 22:58:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:13,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:25,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2730 treesize of output 2666 [2021-11-20 22:58:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:26,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313118215] [2021-11-20 22:58:26,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313118215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:26,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037615180] [2021-11-20 22:58:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:26,478 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:58:26,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:58:26,485 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:58:26,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-20 22:58:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:26,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:58:26,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:26,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:58:26,771 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:58:26,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-20 22:58:26,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:58:27,078 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:58:27,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-20 22:58:27,205 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:58:27,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 44 [2021-11-20 22:58:27,473 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:58:27,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2021-11-20 22:58:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:27,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:33,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2730 treesize of output 2666 [2021-11-20 22:58:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:34,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1037615180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775295790] [2021-11-20 22:58:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:34,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:34,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:58:34,105 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:58:34,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 22:58:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:34,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 22:58:34,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:34,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:58:34,193 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 22:58:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-20 22:58:34,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 22:58:34,291 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:58:34,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-20 22:58:34,357 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:58:34,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 44 [2021-11-20 22:58:34,513 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:58:34,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2021-11-20 22:58:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:34,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:39,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2730 treesize of output 2666 [2021-11-20 22:58:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775295790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:58:40,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-20 22:58:40,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 26 [2021-11-20 22:58:40,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585705102] [2021-11-20 22:58:40,270 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-20 22:58:40,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 22:58:40,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 22:58:40,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=543, Unknown=6, NotChecked=0, Total=650 [2021-11-20 22:58:40,272 INFO L87 Difference]: Start difference. First operand 153 states and 166 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:41,402 INFO L93 Difference]: Finished difference Result 229 states and 247 transitions. [2021-11-20 22:58:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 22:58:41,403 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 22:58:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:41,404 INFO L225 Difference]: With dead ends: 229 [2021-11-20 22:58:41,404 INFO L226 Difference]: Without dead ends: 229 [2021-11-20 22:58:41,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=210, Invalid=906, Unknown=6, NotChecked=0, Total=1122 [2021-11-20 22:58:41,406 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 431 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 362 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:41,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 985 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 463 Invalid, 0 Unknown, 362 Unchecked, 0.8s Time] [2021-11-20 22:58:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-20 22:58:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 167. [2021-11-20 22:58:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 135 states have (on average 1.348148148148148) internal successors, (182), 166 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 182 transitions. [2021-11-20 22:58:41,411 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 182 transitions. Word has length 27 [2021-11-20 22:58:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:41,411 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 182 transitions. [2021-11-20 22:58:41,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 26 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 182 transitions. [2021-11-20 22:58:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 22:58:41,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:41,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:41,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:41,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:41,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:42,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:58:42,034 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:42,035 INFO L85 PathProgramCache]: Analyzing trace with hash -442882051, now seen corresponding path program 1 times [2021-11-20 22:58:42,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:42,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124583185] [2021-11-20 22:58:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:42,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:42,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:42,036 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:42,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 22:58:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 22:58:42,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:42,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:42,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:58:42,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124583185] [2021-11-20 22:58:42,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124583185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 22:58:42,212 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:58:42,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 22:58:42,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937358069] [2021-11-20 22:58:42,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 22:58:42,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:58:42,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-20 22:58:42,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:58:42,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:58:42,214 INFO L87 Difference]: Start difference. First operand 167 states and 182 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:42,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:58:42,245 INFO L93 Difference]: Finished difference Result 209 states and 224 transitions. [2021-11-20 22:58:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:58:42,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-20 22:58:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:58:42,247 INFO L225 Difference]: With dead ends: 209 [2021-11-20 22:58:42,247 INFO L226 Difference]: Without dead ends: 209 [2021-11-20 22:58:42,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:58:42,247 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 52 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:58:42,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 236 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:58:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-20 22:58:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 169. [2021-11-20 22:58:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 137 states have (on average 1.313868613138686) internal successors, (180), 168 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:42,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 180 transitions. [2021-11-20 22:58:42,252 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 180 transitions. Word has length 28 [2021-11-20 22:58:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:58:42,253 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 180 transitions. [2021-11-20 22:58:42,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:58:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 180 transitions. [2021-11-20 22:58:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 22:58:42,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:58:42,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 22:58:42,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 22:58:42,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-20 22:58:42,469 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-11-20 22:58:42,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:58:42,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1554549191, now seen corresponding path program 1 times [2021-11-20 22:58:42,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-20 22:58:42,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169784914] [2021-11-20 22:58:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:58:42,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 22:58:42,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-20 22:58:42,477 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 22:58:42,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 22:58:42,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:58:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 22:58:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:58:42,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 22:58:42,640 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 22:58:42,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-20 22:58:42,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-20 22:58:42,807 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:58:42,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 31 [2021-11-20 22:58:42,894 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:58:42,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 52 [2021-11-20 22:58:43,261 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:58:43,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 37 [2021-11-20 22:58:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:58:43,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:58:45,727 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~item~0#1.offset| (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |ULTIMATE.start_main_~item~0#1.offset| (_ bv0 32)) (bvadd (_ bv4 32) |ULTIMATE.start_main_~item~0#1.offset|) v_DerPreprocessor_12)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))))))) is different from false [2021-11-20 22:59:03,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 614 treesize of output 606 [2021-11-20 22:59:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:59:30,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-20 22:59:30,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169784914] [2021-11-20 22:59:30,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169784914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:59:30,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1618473131] [2021-11-20 22:59:30,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:59:30,955 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-20 22:59:30,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-20 22:59:30,956 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-20 22:59:30,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_224685c8-1fab-4922-9542-9da447953829/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-20 22:59:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:59:31,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 22:59:31,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:59:31,099 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 22:59:31,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-11-20 22:59:31,286 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-20 22:59:31,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 46 treesize of output 63 [2021-11-20 22:59:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 22:59:31,953 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 22:59:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 34 [2021-11-20 22:59:32,152 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-20 22:59:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 52 [2021-11-20 22:59:33,090 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 22:59:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 37 [2021-11-20 22:59:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:59:33,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:59:40,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 614 treesize of output 606