./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-queue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-queue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9a441ad5f70efa202eb02609b90cbc83f5bf4487618c2a09bffcfe320d65f90 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:16:14,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:16:14,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:16:14,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:16:14,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:16:14,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:16:14,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:16:14,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:16:14,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:16:14,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:16:14,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:16:14,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:16:14,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:16:14,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:16:14,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:16:14,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:16:14,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:16:14,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:16:14,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:16:14,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:16:14,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:16:14,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:16:14,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:16:14,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:16:14,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:16:14,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:16:14,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:16:14,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:16:14,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:16:14,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:16:14,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:16:14,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:16:14,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:16:14,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:16:14,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:16:14,704 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:16:14,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:16:14,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:16:14,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:16:14,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:16:14,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:16:14,709 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 00:16:14,748 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:16:14,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:16:14,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:16:14,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:16:14,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:16:14,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:16:14,750 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:16:14,750 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:16:14,750 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:16:14,750 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:16:14,750 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:16:14,751 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:16:14,751 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:16:14,751 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:16:14,751 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:16:14,751 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:16:14,752 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:16:14,752 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:16:14,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 00:16:14,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 00:16:14,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:16:14,753 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 00:16:14,753 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 00:16:14,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:16:14,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 00:16:14,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:16:14,754 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 00:16:14,754 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 00:16:14,754 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 00:16:14,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:16:14,755 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 00:16:14,755 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 00:16:14,755 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:16:14,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:16:14,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:16:14,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:16:14,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:16:14,756 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:16:14,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:16:14,756 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:16:14,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:16:14,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:16:14,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9a441ad5f70efa202eb02609b90cbc83f5bf4487618c2a09bffcfe320d65f90 [2022-11-22 00:16:15,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:16:15,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:16:15,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:16:15,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:16:15,151 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:16:15,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/forester-heap/sll-queue-1.i [2022-11-22 00:16:18,108 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:16:18,365 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:16:18,366 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i [2022-11-22 00:16:18,378 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/data/747222a42/694bc303e4934489ae25e97b25b877d2/FLAG43ced9539 [2022-11-22 00:16:18,393 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/data/747222a42/694bc303e4934489ae25e97b25b877d2 [2022-11-22 00:16:18,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:16:18,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:16:18,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:16:18,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:16:18,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:16:18,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:18,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@468cbb6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18, skipping insertion in model container [2022-11-22 00:16:18,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:18,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:16:18,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:16:18,813 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22387,22400] [2022-11-22 00:16:18,820 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22458,22471] [2022-11-22 00:16:18,821 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22532,22545] [2022-11-22 00:16:18,823 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22624,22637] [2022-11-22 00:16:18,824 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22701,22714] [2022-11-22 00:16:18,825 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22796,22809] [2022-11-22 00:16:18,827 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22873,22886] [2022-11-22 00:16:18,828 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22956,22969] [2022-11-22 00:16:18,831 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23051,23064] [2022-11-22 00:16:18,833 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23128,23141] [2022-11-22 00:16:18,835 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23211,23224] [2022-11-22 00:16:18,837 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23300,23313] [2022-11-22 00:16:18,840 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23386,23399] [2022-11-22 00:16:18,843 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23532,23545] [2022-11-22 00:16:18,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:16:18,868 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:16:18,924 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22387,22400] [2022-11-22 00:16:18,927 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22458,22471] [2022-11-22 00:16:18,932 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22532,22545] [2022-11-22 00:16:18,934 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22624,22637] [2022-11-22 00:16:18,935 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22701,22714] [2022-11-22 00:16:18,938 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22796,22809] [2022-11-22 00:16:18,941 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22873,22886] [2022-11-22 00:16:18,944 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[22956,22969] [2022-11-22 00:16:18,947 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23051,23064] [2022-11-22 00:16:18,950 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23128,23141] [2022-11-22 00:16:18,952 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23211,23224] [2022-11-22 00:16:18,955 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23300,23313] [2022-11-22 00:16:18,956 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23386,23399] [2022-11-22 00:16:18,958 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/sv-benchmarks/c/forester-heap/sll-queue-1.i[23532,23545] [2022-11-22 00:16:18,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:16:18,998 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:16:18,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18 WrapperNode [2022-11-22 00:16:18,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:16:19,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:16:19,001 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:16:19,001 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:16:19,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,073 INFO L138 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 222 [2022-11-22 00:16:19,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:16:19,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:16:19,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:16:19,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:16:19,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,108 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:16:19,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:16:19,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:16:19,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:16:19,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (1/1) ... [2022-11-22 00:16:19,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:16:19,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:19,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:16:19,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:16:19,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 00:16:19,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 00:16:19,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 00:16:19,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:16:19,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 00:16:19,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 00:16:19,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 00:16:19,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:16:19,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:16:19,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:16:19,349 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:16:19,379 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:16:19,946 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:16:19,986 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:16:19,987 INFO L300 CfgBuilder]: Removed 31 assume(true) statements. [2022-11-22 00:16:19,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:16:19 BoogieIcfgContainer [2022-11-22 00:16:19,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:16:19,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:16:19,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:16:19,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:16:19,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:16:18" (1/3) ... [2022-11-22 00:16:19,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ae4717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:16:19, skipping insertion in model container [2022-11-22 00:16:19,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:16:18" (2/3) ... [2022-11-22 00:16:19,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13ae4717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:16:19, skipping insertion in model container [2022-11-22 00:16:19,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:16:19" (3/3) ... [2022-11-22 00:16:19,999 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-queue-1.i [2022-11-22 00:16:20,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:16:20,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2022-11-22 00:16:20,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:16:20,076 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@92f6f69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:16:20,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2022-11-22 00:16:20,081 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) [2022-11-22 00:16:20,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 00:16:20,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:20,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 00:16:20,088 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash 14481, now seen corresponding path program 1 times [2022-11-22 00:16:20,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:20,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058447245] [2022-11-22 00:16:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:20,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:20,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:20,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058447245] [2022-11-22 00:16:20,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058447245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:20,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:20,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:16:20,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600368561] [2022-11-22 00:16:20,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:20,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:16:20,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:16:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:20,320 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) [2022-11-22 00:16:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:20,471 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2022-11-22 00:16:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:16:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 00:16:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:20,493 INFO L225 Difference]: With dead ends: 153 [2022-11-22 00:16:20,493 INFO L226 Difference]: Without dead ends: 151 [2022-11-22 00:16:20,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:20,498 INFO L413 NwaCegarLoop]: 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:20,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 91 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-22 00:16:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2022-11-22 00:16:20,544 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) [2022-11-22 00:16:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2022-11-22 00:16:20,548 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 2 [2022-11-22 00:16:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:20,549 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2022-11-22 00:16:20,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2022-11-22 00:16:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 00:16:20,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:20,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 00:16:20,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:16:20,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:20,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 14482, now seen corresponding path program 1 times [2022-11-22 00:16:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:20,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546334674] [2022-11-22 00:16:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:20,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:20,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546334674] [2022-11-22 00:16:20,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546334674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:20,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:20,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 00:16:20,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41217092] [2022-11-22 00:16:20,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:20,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:16:20,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:20,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:16:20,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:20,698 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) [2022-11-22 00:16:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:20,834 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2022-11-22 00:16:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:16:20,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 00:16:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:20,836 INFO L225 Difference]: With dead ends: 140 [2022-11-22 00:16:20,836 INFO L226 Difference]: Without dead ends: 140 [2022-11-22 00:16:20,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:20,838 INFO L413 NwaCegarLoop]: 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 [2022-11-22 00:16:20,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 96 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:20,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-22 00:16:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-11-22 00:16:20,849 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) [2022-11-22 00:16:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2022-11-22 00:16:20,851 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 2 [2022-11-22 00:16:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:20,852 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2022-11-22 00:16:20,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2022-11-22 00:16:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:16:20,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:20,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:16:20,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:16:20,853 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:20,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:20,854 INFO L85 PathProgramCache]: Analyzing trace with hash 500446804, now seen corresponding path program 1 times [2022-11-22 00:16:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:20,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326715872] [2022-11-22 00:16:20,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:20,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:21,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:21,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326715872] [2022-11-22 00:16:21,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326715872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:21,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:21,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:16:21,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662436813] [2022-11-22 00:16:21,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:21,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:16:21,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:16:21,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:16:21,123 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), 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) [2022-11-22 00:16:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:21,278 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2022-11-22 00:16:21,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:16:21,279 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 [2022-11-22 00:16:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:21,280 INFO L225 Difference]: With dead ends: 146 [2022-11-22 00:16:21,280 INFO L226 Difference]: Without dead ends: 146 [2022-11-22 00:16:21,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:16:21,282 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 240 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:21,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 96 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-22 00:16:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2022-11-22 00:16:21,291 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) [2022-11-22 00:16:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2022-11-22 00:16:21,294 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 6 [2022-11-22 00:16:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:21,294 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2022-11-22 00:16:21,294 INFO L496 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) [2022-11-22 00:16:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2022-11-22 00:16:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:16:21,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:21,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:16:21,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 00:16:21,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:21,297 INFO L85 PathProgramCache]: Analyzing trace with hash 500446805, now seen corresponding path program 1 times [2022-11-22 00:16:21,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:21,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505397943] [2022-11-22 00:16:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:21,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:21,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:21,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505397943] [2022-11-22 00:16:21,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505397943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:21,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:21,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:16:21,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156766551] [2022-11-22 00:16:21,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:21,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:16:21,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:21,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:16:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-22 00:16:21,507 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:21,813 INFO L93 Difference]: Finished difference Result 221 states and 238 transitions. [2022-11-22 00:16:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:16:21,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 00:16:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:21,818 INFO L225 Difference]: With dead ends: 221 [2022-11-22 00:16:21,819 INFO L226 Difference]: Without dead ends: 221 [2022-11-22 00:16:21,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:16:21,825 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 294 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:21,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 219 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:16:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-22 00:16:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 143. [2022-11-22 00:16:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 98 states have (on average 1.6122448979591837) internal successors, (158), 142 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) [2022-11-22 00:16:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2022-11-22 00:16:21,850 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 6 [2022-11-22 00:16:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:21,851 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2022-11-22 00:16:21,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2022-11-22 00:16:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:16:21,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:21,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:21,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:16:21,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:21,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1666017632, now seen corresponding path program 1 times [2022-11-22 00:16:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:21,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11077827] [2022-11-22 00:16:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:21,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:21,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:21,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11077827] [2022-11-22 00:16:21,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11077827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:21,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:21,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:16:21,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320913413] [2022-11-22 00:16:21,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:21,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:16:21,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:21,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:16:21,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:21,889 INFO L87 Difference]: Start difference. First operand 143 states and 158 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) [2022-11-22 00:16:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:21,938 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2022-11-22 00:16:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:16:21,939 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 [2022-11-22 00:16:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:21,940 INFO L225 Difference]: With dead ends: 133 [2022-11-22 00:16:21,940 INFO L226 Difference]: Without dead ends: 133 [2022-11-22 00:16:21,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:21,942 INFO L413 NwaCegarLoop]: 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 [2022-11-22 00:16:21,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 110 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:16:21,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-22 00:16:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-22 00:16:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 93 states have (on average 1.5806451612903225) internal successors, (147), 132 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) [2022-11-22 00:16:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2022-11-22 00:16:21,949 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 7 [2022-11-22 00:16:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:21,950 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2022-11-22 00:16:21,950 INFO L496 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) [2022-11-22 00:16:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2022-11-22 00:16:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 00:16:21,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:21,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:21,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 00:16:21,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:21,952 INFO L85 PathProgramCache]: Analyzing trace with hash -106550054, now seen corresponding path program 1 times [2022-11-22 00:16:21,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:21,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675082015] [2022-11-22 00:16:21,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:21,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:22,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675082015] [2022-11-22 00:16:22,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675082015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:22,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:22,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:16:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289981199] [2022-11-22 00:16:22,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:22,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:16:22,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:22,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:16:22,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:16:22,079 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:22,231 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2022-11-22 00:16:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:16:22,233 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 00:16:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:22,235 INFO L225 Difference]: With dead ends: 135 [2022-11-22 00:16:22,237 INFO L226 Difference]: Without dead ends: 135 [2022-11-22 00:16:22,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:16:22,240 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 102 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:22,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 258 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-22 00:16:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2022-11-22 00:16:22,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 93 states have (on average 1.5698924731182795) internal successors, (146), 131 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) [2022-11-22 00:16:22,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2022-11-22 00:16:22,255 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 8 [2022-11-22 00:16:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:22,255 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2022-11-22 00:16:22,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:22,256 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2022-11-22 00:16:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 00:16:22,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:22,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:22,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 00:16:22,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:22,257 INFO L85 PathProgramCache]: Analyzing trace with hash -106550053, now seen corresponding path program 1 times [2022-11-22 00:16:22,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:22,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791813321] [2022-11-22 00:16:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:22,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:22,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:22,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791813321] [2022-11-22 00:16:22,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791813321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:22,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:22,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:16:22,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238296087] [2022-11-22 00:16:22,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:22,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:16:22,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:22,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:16:22,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:16:22,545 INFO L87 Difference]: Start difference. First operand 132 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) [2022-11-22 00:16:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:22,763 INFO L93 Difference]: Finished difference Result 194 states and 211 transitions. [2022-11-22 00:16:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:16:22,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 00:16:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:22,765 INFO L225 Difference]: With dead ends: 194 [2022-11-22 00:16:22,765 INFO L226 Difference]: Without dead ends: 194 [2022-11-22 00:16:22,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:16:22,766 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 89 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:22,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 475 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:16:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-22 00:16:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 122. [2022-11-22 00:16:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 89 states have (on average 1.5168539325842696) internal successors, (135), 121 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2022-11-22 00:16:22,772 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 8 [2022-11-22 00:16:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:22,772 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2022-11-22 00:16:22,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2022-11-22 00:16:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 00:16:22,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:22,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:22,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 00:16:22,774 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:22,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1560613291, now seen corresponding path program 1 times [2022-11-22 00:16:22,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:22,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087062415] [2022-11-22 00:16:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:22,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:22,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:22,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087062415] [2022-11-22 00:16:22,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087062415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:22,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:22,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:16:22,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35129543] [2022-11-22 00:16:22,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:22,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:16:22,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:16:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:22,815 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) 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) [2022-11-22 00:16:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:22,867 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-11-22 00:16:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:16:22,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) 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 [2022-11-22 00:16:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:22,869 INFO L225 Difference]: With dead ends: 168 [2022-11-22 00:16:22,869 INFO L226 Difference]: Without dead ends: 168 [2022-11-22 00:16:22,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:22,871 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 37 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:22,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:16:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-22 00:16:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 133. [2022-11-22 00:16:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 100 states have (on average 1.47) internal successors, (147), 132 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) [2022-11-22 00:16:22,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2022-11-22 00:16:22,879 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 13 [2022-11-22 00:16:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:22,880 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2022-11-22 00:16:22,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) 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) [2022-11-22 00:16:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2022-11-22 00:16:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 00:16:22,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:22,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:22,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 00:16:22,883 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:22,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1586118442, now seen corresponding path program 1 times [2022-11-22 00:16:22,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:22,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853881816] [2022-11-22 00:16:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:22,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:23,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:23,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853881816] [2022-11-22 00:16:23,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853881816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:23,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:23,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:16:23,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353624118] [2022-11-22 00:16:23,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:23,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:16:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:23,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:16:23,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:16:23,058 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 5 states, 5 states have (on average 2.8) 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) [2022-11-22 00:16:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:23,154 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2022-11-22 00:16:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 00:16:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) 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 [2022-11-22 00:16:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:23,156 INFO L225 Difference]: With dead ends: 132 [2022-11-22 00:16:23,156 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 00:16:23,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 00:16:23,159 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 83 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:23,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 338 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:23,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 00:16:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-11-22 00:16:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 99 states have (on average 1.4646464646464648) internal successors, (145), 130 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) [2022-11-22 00:16:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2022-11-22 00:16:23,166 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 14 [2022-11-22 00:16:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:23,166 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2022-11-22 00:16:23,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) 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) [2022-11-22 00:16:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2022-11-22 00:16:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 00:16:23,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:23,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:23,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 00:16:23,168 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:23,169 INFO L85 PathProgramCache]: Analyzing trace with hash 906820433, now seen corresponding path program 1 times [2022-11-22 00:16:23,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:23,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483388750] [2022-11-22 00:16:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:23,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:23,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:23,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483388750] [2022-11-22 00:16:23,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483388750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:23,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:23,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 00:16:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887574459] [2022-11-22 00:16:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:16:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:16:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:16:23,254 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:23,320 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2022-11-22 00:16:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:16:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 00:16:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:23,322 INFO L225 Difference]: With dead ends: 132 [2022-11-22 00:16:23,322 INFO L226 Difference]: Without dead ends: 132 [2022-11-22 00:16:23,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:16:23,323 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 117 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:23,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 183 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-22 00:16:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-11-22 00:16:23,328 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) [2022-11-22 00:16:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2022-11-22 00:16:23,332 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 16 [2022-11-22 00:16:23,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:23,333 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2022-11-22 00:16:23,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:23,333 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2022-11-22 00:16:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 00:16:23,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:23,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:23,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 00:16:23,340 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:23,344 INFO L85 PathProgramCache]: Analyzing trace with hash 906839708, now seen corresponding path program 1 times [2022-11-22 00:16:23,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:23,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030575949] [2022-11-22 00:16:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:23,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:23,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:23,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030575949] [2022-11-22 00:16:23,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030575949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:23,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:23,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 00:16:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037710715] [2022-11-22 00:16:23,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:23,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:16:23,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:16:23,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:16:23,554 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) [2022-11-22 00:16:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:23,670 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2022-11-22 00:16:23,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:16:23,670 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 [2022-11-22 00:16:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:23,672 INFO L225 Difference]: With dead ends: 136 [2022-11-22 00:16:23,672 INFO L226 Difference]: Without dead ends: 136 [2022-11-22 00:16:23,672 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:16:23,673 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 7 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:23,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 388 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-22 00:16:23,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2022-11-22 00:16:23,677 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) [2022-11-22 00:16:23,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 147 transitions. [2022-11-22 00:16:23,678 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 147 transitions. Word has length 16 [2022-11-22 00:16:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:23,679 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 147 transitions. [2022-11-22 00:16:23,679 INFO L496 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) [2022-11-22 00:16:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 147 transitions. [2022-11-22 00:16:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 00:16:23,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:23,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:23,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 00:16:23,682 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:23,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1953337202, now seen corresponding path program 1 times [2022-11-22 00:16:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:23,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559889615] [2022-11-22 00:16:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:23,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:23,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:23,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559889615] [2022-11-22 00:16:23,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559889615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:23,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:23,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:16:23,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770676179] [2022-11-22 00:16:23,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:23,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:16:23,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:16:23,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:16:23,761 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) [2022-11-22 00:16:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:23,848 INFO L93 Difference]: Finished difference Result 134 states and 146 transitions. [2022-11-22 00:16:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:16:23,849 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 [2022-11-22 00:16:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:23,850 INFO L225 Difference]: With dead ends: 134 [2022-11-22 00:16:23,850 INFO L226 Difference]: Without dead ends: 134 [2022-11-22 00:16:23,851 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:16:23,852 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 121 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:23,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 178 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:23,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-22 00:16:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-22 00:16:23,855 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) [2022-11-22 00:16:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 146 transitions. [2022-11-22 00:16:23,856 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 146 transitions. Word has length 17 [2022-11-22 00:16:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:23,857 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 146 transitions. [2022-11-22 00:16:23,857 INFO L496 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) [2022-11-22 00:16:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 146 transitions. [2022-11-22 00:16:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 00:16:23,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:23,862 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:23,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 00:16:23,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 643754262, now seen corresponding path program 1 times [2022-11-22 00:16:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187860434] [2022-11-22 00:16:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:23,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:24,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:24,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187860434] [2022-11-22 00:16:24,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187860434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:16:24,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757997467] [2022-11-22 00:16:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:24,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:24,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:24,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:24,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:16:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:24,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 00:16:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:24,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:24,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:24,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 00:16:24,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-22 00:16:24,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 00:16:24,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 00:16:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:24,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:24,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757997467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:24,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [328654750] [2022-11-22 00:16:24,577 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-22 00:16:24,578 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:24,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:24,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:24,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:24,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:24,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:16:24,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:24,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:16:24,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:24,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:24,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:24,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:24,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:16:25,130 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:26,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [328654750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:26,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:16:26,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4, 4] total 12 [2022-11-22 00:16:26,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464624325] [2022-11-22 00:16:26,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:26,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 00:16:26,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 00:16:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:16:26,538 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) [2022-11-22 00:16:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:27,073 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2022-11-22 00:16:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 00:16:27,073 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 [2022-11-22 00:16:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:27,074 INFO L225 Difference]: With dead ends: 146 [2022-11-22 00:16:27,074 INFO L226 Difference]: Without dead ends: 146 [2022-11-22 00:16:27,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:16:27,075 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 17 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:27,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 299 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:16:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-22 00:16:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-11-22 00:16:27,078 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) [2022-11-22 00:16:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2022-11-22 00:16:27,079 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 20 [2022-11-22 00:16:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:27,079 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2022-11-22 00:16:27,079 INFO L496 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) [2022-11-22 00:16:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2022-11-22 00:16:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 00:16:27,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:27,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:27,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:27,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 00:16:27,280 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:27,281 INFO L85 PathProgramCache]: Analyzing trace with hash 643755330, now seen corresponding path program 1 times [2022-11-22 00:16:27,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:27,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223514265] [2022-11-22 00:16:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:27,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:27,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223514265] [2022-11-22 00:16:27,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223514265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:16:27,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933619813] [2022-11-22 00:16:27,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:27,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:27,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:27,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:27,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:16:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:27,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 00:16:27,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:27,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:16:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:27,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:27,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933619813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:27,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584258857] [2022-11-22 00:16:27,615 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-22 00:16:27,615 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:27,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:27,616 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:27,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:27,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:16:27,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:27,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:16:27,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:27,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:27,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:27,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:16:27,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:27,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:27,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:29,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1584258857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:29,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:16:29,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [3, 3, 3] total 13 [2022-11-22 00:16:29,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174636493] [2022-11-22 00:16:29,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:29,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 00:16:29,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:29,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 00:16:29,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:16:29,363 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) [2022-11-22 00:16:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:30,027 INFO L93 Difference]: Finished difference Result 141 states and 153 transitions. [2022-11-22 00:16:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:16:30,027 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 [2022-11-22 00:16:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:30,028 INFO L225 Difference]: With dead ends: 141 [2022-11-22 00:16:30,028 INFO L226 Difference]: Without dead ends: 126 [2022-11-22 00:16:30,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-22 00:16:30,029 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 15 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:30,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 343 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:16:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-22 00:16:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-11-22 00:16:30,032 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) [2022-11-22 00:16:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2022-11-22 00:16:30,032 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 20 [2022-11-22 00:16:30,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:30,033 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2022-11-22 00:16:30,033 INFO L496 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) [2022-11-22 00:16:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2022-11-22 00:16:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 00:16:30,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:30,034 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:30,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 00:16:30,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:16:30,245 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:30,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1524985434, now seen corresponding path program 1 times [2022-11-22 00:16:30,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:30,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586799667] [2022-11-22 00:16:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:30,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:30,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586799667] [2022-11-22 00:16:30,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586799667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:16:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111770069] [2022-11-22 00:16:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:30,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:30,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:30,585 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:30,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:16:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:30,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 00:16:30,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:30,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:16:30,782 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:16:30,782 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:16:30,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:30,932 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:16:30,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-11-22 00:16:30,975 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:16:30,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-22 00:16:31,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-22 00:16:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:31,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:31,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:31,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-11-22 00:16:31,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:31,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-11-22 00:16:31,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-22 00:16:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:31,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111770069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [535652723] [2022-11-22 00:16:31,388 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 00:16:31,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:31,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:31,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:31,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:31,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:16:31,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:16:31,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:31,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:31,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:31,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:16:31,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:31,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:16:31,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:16:31,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:16:31,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:16:31,643 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:16:31,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:16:31,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:16:31,686 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:16:31,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:16:31,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,737 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:16:31,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:16:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:16:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:16:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 52 [2022-11-22 00:16:31,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:31,927 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:16:31,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-11-22 00:16:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 86 [2022-11-22 00:16:31,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:31,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:16:32,032 INFO L321 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-22 00:16:32,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 120 [2022-11-22 00:16:32,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-11-22 00:16:32,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-22 00:16:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:32,145 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:16:32,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2022-11-22 00:16:32,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,170 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:16:32,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:16:32,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:32,187 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:16:32,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:16:32,372 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:16:32,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:16:32,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:32,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:16:32,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:32,541 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-22 00:16:32,542 INFO L350 Elim1Store]: Elim1 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 92 treesize of output 122 [2022-11-22 00:16:32,609 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-22 00:16:32,610 INFO L350 Elim1Store]: Elim1 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 84 treesize of output 114 [2022-11-22 00:16:33,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:16:33,267 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:34,841 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4642#(and (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (<= 0 |ULTIMATE.start_main_~item~0#1.offset|) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (= |ULTIMATE.start_main_~status~0#1| 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0) (<= |ULTIMATE.start_main_~item~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:34,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:34,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:16:34,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-11-22 00:16:34,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817022480] [2022-11-22 00:16:34,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:34,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 00:16:34,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:34,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 00:16:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=968, Unknown=8, NotChecked=0, Total=1122 [2022-11-22 00:16:34,844 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:35,747 INFO L93 Difference]: Finished difference Result 239 states and 262 transitions. [2022-11-22 00:16:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 00:16:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-11-22 00:16:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:35,749 INFO L225 Difference]: With dead ends: 239 [2022-11-22 00:16:35,749 INFO L226 Difference]: Without dead ends: 239 [2022-11-22 00:16:35,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=250, Invalid=1464, Unknown=8, NotChecked=0, Total=1722 [2022-11-22 00:16:35,751 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 811 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:35,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 937 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 00:16:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-22 00:16:35,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 140. [2022-11-22 00:16:35,755 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) [2022-11-22 00:16:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 153 transitions. [2022-11-22 00:16:35,756 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 153 transitions. Word has length 24 [2022-11-22 00:16:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:35,756 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 153 transitions. [2022-11-22 00:16:35,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 153 transitions. [2022-11-22 00:16:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 00:16:35,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:35,757 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:35,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:35,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 00:16:35,963 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2121973913, now seen corresponding path program 1 times [2022-11-22 00:16:35,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:35,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905028535] [2022-11-22 00:16:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:35,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:36,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905028535] [2022-11-22 00:16:36,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905028535] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:16:36,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:16:36,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:16:36,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445696123] [2022-11-22 00:16:36,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:16:36,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:16:36,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:36,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:16:36,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:36,006 INFO L87 Difference]: Start difference. First operand 140 states and 153 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:36,063 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2022-11-22 00:16:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:16:36,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-22 00:16:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:36,064 INFO L225 Difference]: With dead ends: 191 [2022-11-22 00:16:36,065 INFO L226 Difference]: Without dead ends: 191 [2022-11-22 00:16:36,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:16:36,065 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 45 mSDsluCounter, 88 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:36,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 193 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:16:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-22 00:16:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 156. [2022-11-22 00:16:36,069 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) [2022-11-22 00:16:36,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 169 transitions. [2022-11-22 00:16:36,070 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 169 transitions. Word has length 25 [2022-11-22 00:16:36,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:36,070 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 169 transitions. [2022-11-22 00:16:36,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:36,071 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 169 transitions. [2022-11-22 00:16:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 00:16:36,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:36,071 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:36,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 00:16:36,072 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -559240723, now seen corresponding path program 1 times [2022-11-22 00:16:36,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:36,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686977038] [2022-11-22 00:16:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:36,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:36,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:36,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:36,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686977038] [2022-11-22 00:16:36,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686977038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:16:36,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025242937] [2022-11-22 00:16:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:36,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:36,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:36,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:36,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:16:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 00:16:36,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:36,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:16:36,611 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:16:36,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-22 00:16:36,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:36,735 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:16:36,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-22 00:16:36,773 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:16:36,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-22 00:16:36,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-22 00:16:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:37,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:37,100 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_435 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_435) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2022-11-22 00:16:37,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:37,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-22 00:16:37,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:37,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-22 00:16:37,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-22 00:16:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:41,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025242937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:41,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715683983] [2022-11-22 00:16:41,331 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-22 00:16:41,332 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:41,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:41,332 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:41,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:16:41,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:41,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:41,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:16:41,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:41,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:16:41,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:16:41,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:16:41,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:16:41,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:16:41,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,568 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-22 00:16:41,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-22 00:16:41,595 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:16:41,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:16:41,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:16:41,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:41,657 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:16:41,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 56 [2022-11-22 00:16:41,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,676 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:16:41,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:16:41,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:41,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:16:41,750 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:16:41,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:16:41,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:16:41,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:41,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:41,899 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:16:41,900 INFO L350 Elim1Store]: Elim1 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 172 treesize of output 190 [2022-11-22 00:16:41,974 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:16:41,974 INFO L350 Elim1Store]: Elim1 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 156 treesize of output 150 [2022-11-22 00:16:43,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:16:43,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:16:43,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:16:43,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:16:43,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:16:43,816 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:16:43,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:43,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:43,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:16:43,955 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:16:43,955 INFO L350 Elim1Store]: Elim1 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 172 treesize of output 190 [2022-11-22 00:16:44,021 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:16:44,022 INFO L350 Elim1Store]: Elim1 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 156 treesize of output 150 [2022-11-22 00:16:47,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:16:47,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:16:47,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:16:47,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:16:47,500 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:16:49,758 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5610#(and (= |ULTIMATE.start_main_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (not |ULTIMATE.start_main_#t~short23#1|) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start_main_~item~0#1.base|) 1)) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (= |ULTIMATE.start_main_~status~0#1| 1) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) |ULTIMATE.start_main_~item~0#1.offset|) (or (not (= |ULTIMATE.start_main_~item~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~item~0#1.base| 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:16:49,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:16:49,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:16:49,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2022-11-22 00:16:49,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644643884] [2022-11-22 00:16:49,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:16:49,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 00:16:49,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:16:49,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 00:16:49,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1649, Unknown=2, NotChecked=84, Total=1980 [2022-11-22 00:16:49,761 INFO L87 Difference]: Start difference. First operand 156 states and 169 transitions. Second operand has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:50,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:16:50,595 INFO L93 Difference]: Finished difference Result 282 states and 305 transitions. [2022-11-22 00:16:50,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 00:16:50,596 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-22 00:16:50,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:16:50,597 INFO L225 Difference]: With dead ends: 282 [2022-11-22 00:16:50,597 INFO L226 Difference]: Without dead ends: 282 [2022-11-22 00:16:50,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=388, Invalid=2476, Unknown=2, NotChecked=104, Total=2970 [2022-11-22 00:16:50,598 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 978 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:16:50,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 523 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 479 Invalid, 0 Unknown, 184 Unchecked, 0.5s Time] [2022-11-22 00:16:50,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-22 00:16:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 165. [2022-11-22 00:16:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 133 states have (on average 1.3609022556390977) internal successors, (181), 164 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 181 transitions. [2022-11-22 00:16:50,603 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 181 transitions. Word has length 32 [2022-11-22 00:16:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:16:50,604 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 181 transitions. [2022-11-22 00:16:50,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.130434782608695) internal successors, (95), 24 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:16:50,604 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 181 transitions. [2022-11-22 00:16:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-22 00:16:50,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:16:50,605 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:16:50,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 00:16:50,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 00:16:50,805 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:16:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:16:50,806 INFO L85 PathProgramCache]: Analyzing trace with hash -559240722, now seen corresponding path program 1 times [2022-11-22 00:16:50,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:16:50,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51002960] [2022-11-22 00:16:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:50,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:16:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:51,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:16:51,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51002960] [2022-11-22 00:16:51,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51002960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:16:51,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177425826] [2022-11-22 00:16:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:16:51,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:16:51,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:16:51,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:16:51,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:16:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:16:51,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 00:16:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:16:51,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:16:51,580 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:16:51,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:16:51,587 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:16:51,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:51,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:51,728 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:16:51,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-22 00:16:51,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:51,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 00:16:51,774 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:16:51,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-22 00:16:51,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-22 00:16:51,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-22 00:16:51,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-22 00:16:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:52,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:16:52,179 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_512 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_512) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4))) (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_512 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_512) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_513) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2022-11-22 00:16:52,205 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_512 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_512) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_513) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_512 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_512) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4))))) is different from false [2022-11-22 00:16:52,214 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:52,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-22 00:16:52,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:52,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-22 00:16:52,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:52,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2022-11-22 00:16:52,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:52,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2022-11-22 00:16:52,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-11-22 00:16:52,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-11-22 00:16:52,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:16:52,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-22 00:16:52,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:52,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-22 00:16:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:16:52,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177425826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:16:52,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [39867427] [2022-11-22 00:16:52,442 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-22 00:16:52,442 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:16:52,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:16:52,443 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:16:52,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:16:52,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:16:52,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:16:52,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:16:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:16:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:16:52,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:16:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:16:52,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:16:52,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:16:52,658 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:16:52,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:16:52,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:16:52,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:16:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:16:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:16:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:52,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:16:52,885 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 00:16:52,885 INFO L350 Elim1Store]: Elim1 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 301 treesize of output 300 [2022-11-22 00:16:52,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:52,996 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:16:52,997 INFO L350 Elim1Store]: Elim1 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 327 treesize of output 321 [2022-11-22 00:16:53,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:53,037 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 00:16:53,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 320 treesize of output 323 [2022-11-22 00:16:53,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:53,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:53,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:53,078 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 00:16:53,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 328 treesize of output 311 [2022-11-22 00:16:53,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:53,463 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 00:16:53,464 INFO L350 Elim1Store]: Elim1 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 466 treesize of output 363 [2022-11-22 00:16:53,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:53,540 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-22 00:16:53,540 INFO L350 Elim1Store]: Elim1 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 418 treesize of output 412 [2022-11-22 00:16:53,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:53,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:53,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:53,634 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-22 00:16:53,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-22 00:16:53,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:53,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:53,983 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:16:53,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2022-11-22 00:16:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:54,003 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 00:16:54,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:16:54,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:54,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:54,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:54,024 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:16:54,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:16:54,150 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 00:16:54,151 INFO L350 Elim1Store]: Elim1 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 301 treesize of output 300 [2022-11-22 00:16:54,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:54,255 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:16:54,255 INFO L350 Elim1Store]: Elim1 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 327 treesize of output 321 [2022-11-22 00:16:54,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:54,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:54,289 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 00:16:54,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 324 treesize of output 307 [2022-11-22 00:16:54,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:54,348 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 00:16:54,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 320 treesize of output 323 [2022-11-22 00:16:54,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:54,707 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 00:16:54,708 INFO L350 Elim1Store]: Elim1 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 466 treesize of output 363 [2022-11-22 00:16:54,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:54,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:54,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:54,809 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-22 00:16:54,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 422 treesize of output 405 [2022-11-22 00:16:54,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:16:54,870 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-22 00:16:54,870 INFO L350 Elim1Store]: Elim1 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 418 treesize of output 412 [2022-11-22 00:16:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:55,174 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 00:16:55,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:16:55,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:55,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:16:55,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:55,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:16:55,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:16:55,496 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:02,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [39867427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:02,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:17:02,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [10, 7, 7] total 37 [2022-11-22 00:17:02,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430206313] [2022-11-22 00:17:02,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:02,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 00:17:02,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:02,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 00:17:02,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1020, Unknown=2, NotChecked=138, Total=1406 [2022-11-22 00:17:02,040 INFO L87 Difference]: Start difference. First operand 165 states and 181 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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) [2022-11-22 00:17:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:04,630 INFO L93 Difference]: Finished difference Result 177 states and 191 transitions. [2022-11-22 00:17:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 00:17:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 [2022-11-22 00:17:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:04,635 INFO L225 Difference]: With dead ends: 177 [2022-11-22 00:17:04,635 INFO L226 Difference]: Without dead ends: 177 [2022-11-22 00:17:04,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=300, Invalid=1188, Unknown=2, NotChecked=150, Total=1640 [2022-11-22 00:17:04,636 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 31 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:04,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 536 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 00:17:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-22 00:17:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 168. [2022-11-22 00:17:04,640 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) [2022-11-22 00:17:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2022-11-22 00:17:04,640 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 32 [2022-11-22 00:17:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:04,641 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2022-11-22 00:17:04,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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) [2022-11-22 00:17:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2022-11-22 00:17:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 00:17:04,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:04,642 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:04,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:04,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 00:17:04,848 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:17:04,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash -559358684, now seen corresponding path program 1 times [2022-11-22 00:17:04,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:04,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151879792] [2022-11-22 00:17:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:04,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:05,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151879792] [2022-11-22 00:17:05,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151879792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:17:05,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270757972] [2022-11-22 00:17:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:05,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:05,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:05,572 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:05,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:17:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:05,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-22 00:17:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:05,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:17:05,738 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:17:05,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:17:05,749 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:05,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:05,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:05,887 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:17:05,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-22 00:17:05,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 00:17:05,912 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:17:05,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-22 00:17:06,009 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:17:06,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 63 [2022-11-22 00:17:06,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-22 00:17:06,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-22 00:17:06,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-22 00:17:06,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-22 00:17:06,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-22 00:17:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:06,433 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:06,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-22 00:17:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:06,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:06,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2022-11-22 00:17:06,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:06,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-22 00:17:06,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:06,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-22 00:17:06,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 00:17:06,849 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:17:06,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2022-11-22 00:17:06,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:06,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-22 00:17:06,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:06,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:06,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-11-22 00:17:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:07,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270757972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:17:07,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373477523] [2022-11-22 00:17:07,025 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-22 00:17:07,025 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:17:07,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:17:07,025 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:17:07,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:17:07,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:17:07,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:07,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:17:07,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:07,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:17:07,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:07,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:17:07,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:07,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:07,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:07,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,236 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-22 00:17:07,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-22 00:17:07,261 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:17:07,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:17:07,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:17:07,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,310 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:17:07,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:17:07,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:17:07,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 00:17:07,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:07,412 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:07,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:07,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:07,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:07,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:07,577 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:07,577 INFO L350 Elim1Store]: Elim1 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 172 treesize of output 166 [2022-11-22 00:17:07,646 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:07,646 INFO L350 Elim1Store]: Elim1 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 132 treesize of output 150 [2022-11-22 00:17:07,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:07,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:17:07,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:07,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:07,892 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:07,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:07,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:07,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:07,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:08,071 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:08,071 INFO L350 Elim1Store]: Elim1 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 172 treesize of output 166 [2022-11-22 00:17:08,137 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:08,138 INFO L350 Elim1Store]: Elim1 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 132 treesize of output 150 [2022-11-22 00:17:09,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:10,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:17:10,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:17:10,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:17:10,276 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:13,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6900#(and (= |ULTIMATE.start_main_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (<= 0 (+ 4 |ULTIMATE.start_main_~item~0#1.offset|)) (<= (+ 8 |ULTIMATE.start_main_~item~0#1.offset|) (select |#length| |ULTIMATE.start_main_~item~0#1.base|)) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (= |ULTIMATE.start_main_~status~0#1| 1) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) |ULTIMATE.start_main_~item~0#1.offset|) (not (< 0 (select (select |#memory_int| |ULTIMATE.start_main_~item~0#1.base|) (+ 4 |ULTIMATE.start_main_~item~0#1.offset|)))) (or (not (= |ULTIMATE.start_main_~item~0#1.offset| 0)) (not (= |ULTIMATE.start_main_~item~0#1.base| 0))) (<= 0 |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start_main_~item~0#1.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-22 00:17:13,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:17:13,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:17:13,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2022-11-22 00:17:13,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786898140] [2022-11-22 00:17:13,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:17:13,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 00:17:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:13,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 00:17:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 00:17:13,013 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:15,074 INFO L93 Difference]: Finished difference Result 287 states and 308 transitions. [2022-11-22 00:17:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 00:17:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 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 [2022-11-22 00:17:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:15,076 INFO L225 Difference]: With dead ends: 287 [2022-11-22 00:17:15,076 INFO L226 Difference]: Without dead ends: 287 [2022-11-22 00:17:15,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=420, Invalid=3740, Unknown=0, NotChecked=0, Total=4160 [2022-11-22 00:17:15,078 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 536 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:15,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1392 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 00:17:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-22 00:17:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2022-11-22 00:17:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 136 states have (on average 1.3308823529411764) internal successors, (181), 167 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2022-11-22 00:17:15,082 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 34 [2022-11-22 00:17:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:15,083 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2022-11-22 00:17:15,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 27 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2022-11-22 00:17:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 00:17:15,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:15,084 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:17:15,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:15,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:15,290 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr64REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:17:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1341637657, now seen corresponding path program 1 times [2022-11-22 00:17:15,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:15,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053267413] [2022-11-22 00:17:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:15,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:15,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053267413] [2022-11-22 00:17:15,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053267413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:17:15,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861137681] [2022-11-22 00:17:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:15,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:15,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:17:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:15,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 00:17:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:15,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:17:15,858 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 00:17:15,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-22 00:17:15,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:15,979 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:17:15,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-22 00:17:16,021 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:17:16,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-22 00:17:16,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-22 00:17:16,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-22 00:17:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:16,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:16,401 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_669 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_669) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|))) (forall ((v_ArrVal_669 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_669) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1))) is different from false [2022-11-22 00:17:16,420 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_669 (Array Int Int))) (= 1 (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_669) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_669 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_669) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|))))) is different from false [2022-11-22 00:17:16,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:16,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-11-22 00:17:16,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:16,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-11-22 00:17:16,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-22 00:17:16,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:16,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-22 00:17:16,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:16,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-22 00:17:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:16,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861137681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:17:16,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [443905400] [2022-11-22 00:17:16,528 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-22 00:17:16,529 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:17:16,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:17:16,529 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:17:16,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:17:16,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:17:16,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:17:16,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:16,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:16,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:16,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:17:16,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:17:16,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:16,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:16,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:16,737 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:17:16,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:17:16,763 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:17:16,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:17:16,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:16,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:16,825 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:17:16,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2022-11-22 00:17:16,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,842 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:17:16,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:17:16,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:16,858 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:17:16,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:17:16,912 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:16,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:16,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:16,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:16,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:17,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:17,064 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:17,064 INFO L350 Elim1Store]: Elim1 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 175 treesize of output 169 [2022-11-22 00:17:17,129 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:17,130 INFO L350 Elim1Store]: Elim1 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 135 treesize of output 153 [2022-11-22 00:17:17,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:17,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:17,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:17:17,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:17,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:17,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:17,410 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:17,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:17,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:17,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:17,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:17,561 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:17,561 INFO L350 Elim1Store]: Elim1 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 175 treesize of output 169 [2022-11-22 00:17:17,629 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:17,629 INFO L350 Elim1Store]: Elim1 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 135 treesize of output 153 [2022-11-22 00:17:19,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:17:19,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:17:19,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:17:19,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:19,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-22 00:17:19,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-22 00:17:19,720 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:21,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7639#(and (not (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1)) (= |ULTIMATE.start_main_~status~0#1| 1) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:17:21,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:17:21,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:17:21,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-22 00:17:21,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576577031] [2022-11-22 00:17:21,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:17:21,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 00:17:21,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:21,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 00:17:21,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1604, Unknown=2, NotChecked=166, Total=1980 [2022-11-22 00:17:21,631 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:22,099 INFO L93 Difference]: Finished difference Result 199 states and 215 transitions. [2022-11-22 00:17:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 00:17:22,099 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-22 00:17:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:22,101 INFO L225 Difference]: With dead ends: 199 [2022-11-22 00:17:22,101 INFO L226 Difference]: Without dead ends: 199 [2022-11-22 00:17:22,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=226, Invalid=1760, Unknown=2, NotChecked=174, Total=2162 [2022-11-22 00:17:22,102 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 497 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:22,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 650 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 551 Invalid, 0 Unknown, 262 Unchecked, 0.4s Time] [2022-11-22 00:17:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-22 00:17:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 186. [2022-11-22 00:17:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 154 states have (on average 1.3571428571428572) internal successors, (209), 185 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 209 transitions. [2022-11-22 00:17:22,108 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 209 transitions. Word has length 36 [2022-11-22 00:17:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:22,108 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 209 transitions. [2022-11-22 00:17:22,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 209 transitions. [2022-11-22 00:17:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 00:17:22,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:22,109 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:17:22,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:22,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:22,315 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr65REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:17:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1341637656, now seen corresponding path program 1 times [2022-11-22 00:17:22,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:22,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29498458] [2022-11-22 00:17:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:22,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:22,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:22,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29498458] [2022-11-22 00:17:22,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29498458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:17:22,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720780783] [2022-11-22 00:17:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:22,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:22,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:22,679 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:22,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:17:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:22,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-22 00:17:22,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:22,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:17:22,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:17:22,894 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:17:22,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:17:22,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:22,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:23,022 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:17:23,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-22 00:17:23,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 00:17:23,062 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:17:23,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-22 00:17:23,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-22 00:17:23,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-22 00:17:23,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-22 00:17:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:23,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:23,595 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_749 (Array Int Int)) (v_ArrVal_750 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_750) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_749) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_750 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_750) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2022-11-22 00:17:23,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:23,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-22 00:17:23,611 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:23,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-22 00:17:23,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 00:17:23,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:23,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-22 00:17:23,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:23,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-22 00:17:23,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:23,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-22 00:17:23,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:23,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-11-22 00:17:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:23,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720780783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:17:23,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [140219747] [2022-11-22 00:17:23,784 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-22 00:17:23,784 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:17:23,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:17:23,784 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:17:23,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:17:23,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:17:23,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:23,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:23,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:17:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:23,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:23,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:17:23,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:17:23,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:23,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:23,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:23,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:23,982 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-22 00:17:23,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-22 00:17:24,008 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:17:24,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:17:24,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:24,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:17:24,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:24,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:17:24,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:24,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:17:24,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:24,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:24,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:24,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 00:17:24,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:24,144 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:24,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:24,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:24,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:24,275 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:24,275 INFO L350 Elim1Store]: Elim1 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 172 treesize of output 166 [2022-11-22 00:17:24,337 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:24,337 INFO L350 Elim1Store]: Elim1 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 132 treesize of output 150 [2022-11-22 00:17:25,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:25,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:17:25,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:17:25,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:17:25,558 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:25,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:25,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:25,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:25,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:25,626 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 00:17:25,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2022-11-22 00:17:25,658 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:17:25,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:17:25,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:25,733 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:17:25,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 58 [2022-11-22 00:17:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:25,762 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:17:25,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 54 [2022-11-22 00:17:25,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:17:25,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:25,799 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:25,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:25,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:25,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:25,863 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 00:17:25,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2022-11-22 00:17:25,884 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:17:25,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:17:25,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:25,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:17:25,966 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:17:25,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 69 [2022-11-22 00:17:25,996 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:17:25,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 57 [2022-11-22 00:17:26,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:26,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-22 00:17:26,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-22 00:17:26,266 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:28,413 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8286#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~status~0#1| 1) (<= |#NULL.offset| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (or (not (<= 0 |ULTIMATE.start_main_~head~0#1.offset|)) (not (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)))) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 00:17:28,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:17:28,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:17:28,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2022-11-22 00:17:28,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380872331] [2022-11-22 00:17:28,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:17:28,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 00:17:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:28,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 00:17:28,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1780, Unknown=10, NotChecked=86, Total=2070 [2022-11-22 00:17:28,416 INFO L87 Difference]: Start difference. First operand 186 states and 209 transitions. Second operand has 23 states, 22 states have (on average 4.909090909090909) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:29,240 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2022-11-22 00:17:29,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:17:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.909090909090909) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 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 [2022-11-22 00:17:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:29,242 INFO L225 Difference]: With dead ends: 198 [2022-11-22 00:17:29,242 INFO L226 Difference]: Without dead ends: 198 [2022-11-22 00:17:29,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=316, Invalid=2432, Unknown=12, NotChecked=102, Total=2862 [2022-11-22 00:17:29,244 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 821 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:29,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 496 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 485 Invalid, 0 Unknown, 174 Unchecked, 0.4s Time] [2022-11-22 00:17:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-22 00:17:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2022-11-22 00:17:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 154 states have (on average 1.3506493506493507) internal successors, (208), 185 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 208 transitions. [2022-11-22 00:17:29,249 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 208 transitions. Word has length 36 [2022-11-22 00:17:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:29,249 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 208 transitions. [2022-11-22 00:17:29,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.909090909090909) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 208 transitions. [2022-11-22 00:17:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 00:17:29,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:29,250 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:17:29,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:29,456 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr69ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:17:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1341636589, now seen corresponding path program 1 times [2022-11-22 00:17:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:29,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696569641] [2022-11-22 00:17:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:29,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:17:29,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696569641] [2022-11-22 00:17:29,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696569641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:17:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033070281] [2022-11-22 00:17:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:29,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:29,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:29,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:17:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:29,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 00:17:29,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:29,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-22 00:17:29,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-22 00:17:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:17:29,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:17:29,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033070281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:17:29,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1854493420] [2022-11-22 00:17:29,830 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-22 00:17:29,830 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:17:29,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:17:29,832 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:17:29,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:17:29,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:17:29,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:17:29,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:29,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:17:29,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:29,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:29,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:17:29,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:29,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:29,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:30,030 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:17:30,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:17:30,049 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:17:30,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:17:30,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:30,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:17:30,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:17:30,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:17:30,283 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 00:17:30,283 INFO L350 Elim1Store]: Elim1 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 301 treesize of output 300 [2022-11-22 00:17:30,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:30,389 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 00:17:30,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 314 [2022-11-22 00:17:30,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:30,430 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 00:17:30,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 330 [2022-11-22 00:17:30,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:30,474 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:17:30,475 INFO L350 Elim1Store]: Elim1 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 331 treesize of output 325 [2022-11-22 00:17:30,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:30,803 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 00:17:30,803 INFO L350 Elim1Store]: Elim1 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 466 treesize of output 363 [2022-11-22 00:17:30,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:30,861 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-22 00:17:30,862 INFO L350 Elim1Store]: Elim1 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 418 treesize of output 412 [2022-11-22 00:17:30,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:30,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:30,937 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-22 00:17:30,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-22 00:17:31,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:31,097 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 00:17:31,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:17:31,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:31,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:31,124 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:17:31,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2022-11-22 00:17:31,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:31,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:31,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:31,145 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:17:31,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:17:31,280 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 00:17:31,281 INFO L350 Elim1Store]: Elim1 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 301 treesize of output 300 [2022-11-22 00:17:31,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:31,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:31,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:31,394 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 00:17:31,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 314 [2022-11-22 00:17:31,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:31,438 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 00:17:31,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 330 [2022-11-22 00:17:31,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:31,479 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:17:31,480 INFO L350 Elim1Store]: Elim1 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 331 treesize of output 325 [2022-11-22 00:17:31,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:31,790 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 00:17:31,790 INFO L350 Elim1Store]: Elim1 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 466 treesize of output 363 [2022-11-22 00:17:31,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:31,853 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-22 00:17:31,854 INFO L350 Elim1Store]: Elim1 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 418 treesize of output 412 [2022-11-22 00:17:31,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:31,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:31,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:31,929 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-22 00:17:31,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-22 00:17:32,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:32,121 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 00:17:32,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:17:32,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:32,135 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:17:32,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:17:32,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:32,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:32,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:32,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:17:33,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:40,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8926#(and (= |ULTIMATE.start_main_~head~0#1.base| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~status~0#1| 1) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 00:17:40,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:17:40,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:17:40,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-22 00:17:40,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360843641] [2022-11-22 00:17:40,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:17:40,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:17:40,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:40,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:17:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-22 00:17:40,988 INFO L87 Difference]: Start difference. First operand 186 states and 208 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) [2022-11-22 00:17:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:41,143 INFO L93 Difference]: Finished difference Result 210 states and 234 transitions. [2022-11-22 00:17:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:17:41,144 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 [2022-11-22 00:17:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:41,145 INFO L225 Difference]: With dead ends: 210 [2022-11-22 00:17:41,145 INFO L226 Difference]: Without dead ends: 210 [2022-11-22 00:17:41,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-22 00:17:41,146 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 159 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:41,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 276 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:17:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-22 00:17:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-11-22 00:17:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 172 states have (on average 1.3546511627906976) internal successors, (233), 203 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 233 transitions. [2022-11-22 00:17:41,151 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 233 transitions. Word has length 36 [2022-11-22 00:17:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:41,152 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 233 transitions. [2022-11-22 00:17:41,152 INFO L496 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) [2022-11-22 00:17:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 233 transitions. [2022-11-22 00:17:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-22 00:17:41,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:41,153 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:17:41,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:41,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-22 00:17:41,359 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:17:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:41,359 INFO L85 PathProgramCache]: Analyzing trace with hash 987749477, now seen corresponding path program 1 times [2022-11-22 00:17:41,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:41,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479051576] [2022-11-22 00:17:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:41,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 00:17:41,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:41,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479051576] [2022-11-22 00:17:41,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479051576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:17:41,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:17:41,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:17:41,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678102130] [2022-11-22 00:17:41,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:17:41,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 00:17:41,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 00:17:41,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:41,406 INFO L87 Difference]: Start difference. First operand 204 states and 233 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) [2022-11-22 00:17:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:41,463 INFO L93 Difference]: Finished difference Result 257 states and 290 transitions. [2022-11-22 00:17:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 00:17:41,463 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 [2022-11-22 00:17:41,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:41,465 INFO L225 Difference]: With dead ends: 257 [2022-11-22 00:17:41,465 INFO L226 Difference]: Without dead ends: 257 [2022-11-22 00:17:41,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 00:17:41,465 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 54 mSDsluCounter, 80 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 [2022-11-22 00:17:41,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 216 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:17:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-22 00:17:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 221. [2022-11-22 00:17:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 189 states have (on average 1.3280423280423281) internal successors, (251), 220 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 251 transitions. [2022-11-22 00:17:41,471 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 251 transitions. Word has length 36 [2022-11-22 00:17:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:41,471 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 251 transitions. [2022-11-22 00:17:41,471 INFO L496 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) [2022-11-22 00:17:41,472 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 251 transitions. [2022-11-22 00:17:41,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 00:17:41,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:41,472 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:17:41,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-22 00:17:41,473 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:17:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1358906689, now seen corresponding path program 1 times [2022-11-22 00:17:41,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:41,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313537976] [2022-11-22 00:17:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:41,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:41,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:41,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313537976] [2022-11-22 00:17:41,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313537976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:17:41,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268647072] [2022-11-22 00:17:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:41,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:41,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:41,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:41,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:17:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:41,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 00:17:41,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:41,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:17:41,949 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:17:41,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:17:41,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:41,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:42,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-22 00:17:42,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 00:17:42,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 00:17:42,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 00:17:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:42,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:42,200 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_951 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_951) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)) is different from false [2022-11-22 00:17:42,218 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_951 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_951) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)) is different from false [2022-11-22 00:17:42,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:42,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-22 00:17:42,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:42,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-22 00:17:42,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 00:17:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:42,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268647072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:17:42,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030603577] [2022-11-22 00:17:42,311 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-22 00:17:42,311 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:17:42,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:17:42,312 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:17:42,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:17:42,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:17:42,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:17:42,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:42,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:42,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:17:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:42,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:42,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:17:42,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:42,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:42,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:42,505 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:17:42,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:17:42,527 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:17:42,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:17:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:42,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:17:42,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:17:42,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:17:42,741 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 00:17:42,741 INFO L350 Elim1Store]: Elim1 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 301 treesize of output 300 [2022-11-22 00:17:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:42,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:42,839 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 00:17:42,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 314 [2022-11-22 00:17:42,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:42,875 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:17:42,875 INFO L350 Elim1Store]: Elim1 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 327 treesize of output 321 [2022-11-22 00:17:42,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:42,925 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 00:17:42,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 320 treesize of output 323 [2022-11-22 00:17:43,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:43,174 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 00:17:43,174 INFO L350 Elim1Store]: Elim1 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 466 treesize of output 363 [2022-11-22 00:17:43,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:43,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:43,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:43,264 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-22 00:17:43,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 422 treesize of output 405 [2022-11-22 00:17:43,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:43,317 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-22 00:17:43,317 INFO L350 Elim1Store]: Elim1 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 418 treesize of output 412 [2022-11-22 00:17:43,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:43,502 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 00:17:43,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:17:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:43,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:17:43,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:43,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:17:43,643 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 00:17:43,644 INFO L350 Elim1Store]: Elim1 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 301 treesize of output 300 [2022-11-22 00:17:43,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:43,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:43,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:43,740 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 00:17:43,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 314 [2022-11-22 00:17:43,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:43,783 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 00:17:43,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 330 [2022-11-22 00:17:43,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:43,821 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:17:43,822 INFO L350 Elim1Store]: Elim1 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 331 treesize of output 325 [2022-11-22 00:17:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:44,101 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 00:17:44,102 INFO L350 Elim1Store]: Elim1 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 466 treesize of output 363 [2022-11-22 00:17:44,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:44,154 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-22 00:17:44,154 INFO L350 Elim1Store]: Elim1 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 418 treesize of output 412 [2022-11-22 00:17:44,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:44,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:44,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:44,223 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-22 00:17:44,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-22 00:17:44,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:44,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:44,349 INFO L321 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-22 00:17:44,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2022-11-22 00:17:44,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:44,367 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 00:17:44,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:17:44,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:44,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:17:45,285 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:17:53,369 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10078#(and (not (= |ULTIMATE.start_main_~item~0#1.offset| 0)) (= |ULTIMATE.start_main_~status~0#1| 1) (exists ((|v_ULTIMATE.start_main_~head~0#1.offset_83| Int) (|v_ULTIMATE.start_main_~head~0#1.base_94| Int)) (and (<= (+ |v_ULTIMATE.start_main_~head~0#1.offset_83| 4) (select |#length| |v_ULTIMATE.start_main_~head~0#1.base_94|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~head~0#1.base_94|) |v_ULTIMATE.start_main_~head~0#1.offset_83|) |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |v_ULTIMATE.start_main_~head~0#1.offset_83|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~head~0#1.base_94|) |v_ULTIMATE.start_main_~head~0#1.offset_83|) |ULTIMATE.start_main_~head~0#1.base|) (= (select |#valid| |v_ULTIMATE.start_main_~head~0#1.base_94|) 1))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 00:17:53,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:17:53,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:17:53,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-11-22 00:17:53,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828357143] [2022-11-22 00:17:53,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:17:53,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 00:17:53,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:17:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 00:17:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=969, Unknown=2, NotChecked=134, Total=1332 [2022-11-22 00:17:53,372 INFO L87 Difference]: Start difference. First operand 221 states and 251 transitions. Second operand has 20 states, 19 states have (on average 4.105263157894737) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:17:54,001 INFO L93 Difference]: Finished difference Result 373 states and 417 transitions. [2022-11-22 00:17:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 00:17:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.105263157894737) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-22 00:17:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:17:54,003 INFO L225 Difference]: With dead ends: 373 [2022-11-22 00:17:54,003 INFO L226 Difference]: Without dead ends: 373 [2022-11-22 00:17:54,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 70 SyntacticMatches, 14 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=375, Invalid=1437, Unknown=2, NotChecked=166, Total=1980 [2022-11-22 00:17:54,004 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 414 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:17:54,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 676 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 466 Invalid, 1 Unknown, 344 Unchecked, 0.4s Time] [2022-11-22 00:17:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-22 00:17:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 222. [2022-11-22 00:17:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 190 states have (on average 1.3263157894736841) internal successors, (252), 221 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:54,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 252 transitions. [2022-11-22 00:17:54,011 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 252 transitions. Word has length 37 [2022-11-22 00:17:54,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:17:54,011 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 252 transitions. [2022-11-22 00:17:54,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.105263157894737) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:17:54,011 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 252 transitions. [2022-11-22 00:17:54,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 00:17:54,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:17:54,012 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:17:54,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:17:54,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 00:17:54,218 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:17:54,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:17:54,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1587622470, now seen corresponding path program 1 times [2022-11-22 00:17:54,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:17:54,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464252597] [2022-11-22 00:17:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:54,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:17:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:54,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:17:54,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464252597] [2022-11-22 00:17:54,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464252597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:17:54,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654077505] [2022-11-22 00:17:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:17:54,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:17:54,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:17:54,779 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:17:54,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:17:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:17:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 00:17:54,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:17:54,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:17:54,993 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:17:54,994 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:55,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:55,122 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:17:55,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-11-22 00:17:55,150 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:17:55,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2022-11-22 00:17:55,225 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:17:55,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:17:55,267 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:17:55,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2022-11-22 00:17:55,375 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-22 00:17:55,375 INFO L350 Elim1Store]: Elim1 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 46 treesize of output 48 [2022-11-22 00:17:55,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-22 00:17:55,489 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-22 00:17:55,489 INFO L350 Elim1Store]: Elim1 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 55 treesize of output 55 [2022-11-22 00:17:55,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 00:17:55,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-11-22 00:17:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:17:55,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:17:55,719 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1068 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1068) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2022-11-22 00:17:55,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:55,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-22 00:17:55,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:55,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-22 00:17:55,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:55,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 76 [2022-11-22 00:17:56,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:17:56,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 65 [2022-11-22 00:17:56,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-11-22 00:17:56,026 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 00:17:56,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-22 00:17:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-22 00:17:56,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654077505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:17:56,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [791325835] [2022-11-22 00:17:56,222 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 00:17:56,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:17:56,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:17:56,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:17:56,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:17:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:17:56,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:17:56,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:56,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:56,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:17:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:17:56,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:17:56,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:56,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:56,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:17:56,426 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:17:56,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:17:56,448 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:17:56,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:17:56,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:17:56,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,493 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:17:56,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:17:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,508 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:17:56,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:17:56,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:17:56,647 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 00:17:56,647 INFO L350 Elim1Store]: Elim1 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 301 treesize of output 300 [2022-11-22 00:17:56,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:56,745 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:17:56,745 INFO L350 Elim1Store]: Elim1 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 327 treesize of output 321 [2022-11-22 00:17:56,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:56,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:56,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:56,798 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 00:17:56,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 314 [2022-11-22 00:17:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:17:56,837 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 00:17:56,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 330 [2022-11-22 00:17:57,178 INFO L321 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-11-22 00:17:57,179 INFO L350 Elim1Store]: Elim1 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 519 treesize of output 392 [2022-11-22 00:17:57,225 INFO L321 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2022-11-22 00:17:57,225 INFO L350 Elim1Store]: Elim1 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 470 treesize of output 447 [2022-11-22 00:17:57,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,308 INFO L321 Elim1Store]: treesize reduction 212, result has 16.2 percent of original size [2022-11-22 00:17:57,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 427 treesize of output 410 [2022-11-22 00:17:57,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,462 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-22 00:17:57,463 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 204 treesize of output 141 [2022-11-22 00:17:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 89 [2022-11-22 00:17:57,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2022-11-22 00:17:57,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,546 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 00:17:57,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:17:57,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:17:57,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:17:57,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:17:57,627 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:17:57,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:17:57,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:57,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:57,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:17:57,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:17:57,776 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:57,777 INFO L350 Elim1Store]: Elim1 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 169 treesize of output 163 [2022-11-22 00:17:57,838 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:17:57,838 INFO L350 Elim1Store]: Elim1 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 129 treesize of output 147 [2022-11-22 00:18:00,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:00,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:00,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:00,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:00,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:00,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:00,202 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:18:00,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:18:00,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:00,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:00,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:00,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:00,275 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 00:18:00,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2022-11-22 00:18:00,297 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:00,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:00,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:00,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:00,379 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:00,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2022-11-22 00:18:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:00,408 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:00,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 54 [2022-11-22 00:18:00,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:00,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:00,471 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:00,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2022-11-22 00:18:00,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:00,500 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:00,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 54 [2022-11-22 00:18:00,559 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:18:00,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:18:00,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:00,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:00,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:00,627 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 00:18:00,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2022-11-22 00:18:00,648 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:00,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:00,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:00,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:00,722 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:00,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 69 [2022-11-22 00:18:00,753 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:00,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 57 [2022-11-22 00:18:00,836 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:00,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 61 [2022-11-22 00:18:00,866 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:00,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 61 [2022-11-22 00:18:00,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:00,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:02,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10956#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~status~0#1| 2) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (<= 0 |ULTIMATE.start_main_~item~0#1.offset|) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0) (<= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0))' at error location [2022-11-22 00:18:02,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:02,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:02,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 34 [2022-11-22 00:18:02,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765020153] [2022-11-22 00:18:02,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:02,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 00:18:02,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:02,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 00:18:02,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2496, Unknown=13, NotChecked=102, Total=2862 [2022-11-22 00:18:02,949 INFO L87 Difference]: Start difference. First operand 222 states and 252 transitions. Second operand has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 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) [2022-11-22 00:18:05,060 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (and (forall ((v_ArrVal_1068 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1068) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (not (= .cse0 |c_ULTIMATE.start_main_~head~0#1.base|)) (not (= .cse0 0)) (= |c_ULTIMATE.start_main_~head~0#1.offset| 0) (forall ((v_arrayElimArr_15 (Array Int Int)) (v_ArrVal_1068 (Array Int Int)) (|ULTIMATE.start_main_~item~0#1.offset| Int)) (let ((.cse1 (select v_arrayElimArr_15 |ULTIMATE.start_main_~item~0#1.offset|))) (or (not (= (select |c_#valid| .cse1) 0)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_arrayElimArr_15) .cse1 v_ArrVal_1068) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))))) (= (select |c_#valid| |c_ULTIMATE.start_main_~head~0#1.base|) 1))) is different from false [2022-11-22 00:18:05,914 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1068 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1068) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)) (forall ((v_arrayElimArr_15 (Array Int Int)) (v_ArrVal_1068 (Array Int Int)) (|ULTIMATE.start_main_~item~0#1.offset| Int)) (let ((.cse0 (select v_arrayElimArr_15 |ULTIMATE.start_main_~item~0#1.offset|))) (or (not (= (select |c_#valid| .cse0) 0)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_arrayElimArr_15) .cse0 v_ArrVal_1068) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)))))) is different from false [2022-11-22 00:18:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:06,352 INFO L93 Difference]: Finished difference Result 407 states and 459 transitions. [2022-11-22 00:18:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 00:18:06,353 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 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 [2022-11-22 00:18:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:06,354 INFO L225 Difference]: With dead ends: 407 [2022-11-22 00:18:06,354 INFO L226 Difference]: Without dead ends: 407 [2022-11-22 00:18:06,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=836, Invalid=5954, Unknown=28, NotChecked=492, Total=7310 [2022-11-22 00:18:06,356 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1399 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 155 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:06,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1399 Valid, 1137 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1262 Invalid, 4 Unknown, 171 Unchecked, 1.1s Time] [2022-11-22 00:18:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-22 00:18:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 220. [2022-11-22 00:18:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 219 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:06,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 250 transitions. [2022-11-22 00:18:06,366 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 250 transitions. Word has length 37 [2022-11-22 00:18:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:06,367 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 250 transitions. [2022-11-22 00:18:06,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.764705882352941) internal successors, (94), 34 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) [2022-11-22 00:18:06,367 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 250 transitions. [2022-11-22 00:18:06,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 00:18:06,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:06,368 INFO L195 NwaCegarLoop]: 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] [2022-11-22 00:18:06,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-22 00:18:06,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-22 00:18:06,574 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:18:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:06,575 INFO L85 PathProgramCache]: Analyzing trace with hash -823565154, now seen corresponding path program 1 times [2022-11-22 00:18:06,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:06,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252827086] [2022-11-22 00:18:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:06,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:06,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:06,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252827086] [2022-11-22 00:18:06,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252827086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:06,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873706382] [2022-11-22 00:18:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:06,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:06,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:06,911 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:06,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:18:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:07,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 00:18:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:07,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:18:07,136 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:18:07,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:18:07,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:07,247 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:18:07,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-11-22 00:18:07,278 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:18:07,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-22 00:18:07,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-22 00:18:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:07,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:07,545 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1143 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1143) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-22 00:18:07,550 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:07,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-22 00:18:07,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:07,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-22 00:18:07,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-22 00:18:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:07,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873706382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:07,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504988876] [2022-11-22 00:18:07,655 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-22 00:18:07,656 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:07,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:07,656 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:07,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:18:07,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:18:07,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:07,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:07,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:18:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:18:07,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:18:07,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:18:07,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:18:07,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:18:07,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:18:07,847 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:07,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:07,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:18:07,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:07,883 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:18:07,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:18:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:18:07,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:18:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:07,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:18:08,074 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 00:18:08,074 INFO L350 Elim1Store]: Elim1 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 301 treesize of output 300 [2022-11-22 00:18:08,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:08,181 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 00:18:08,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 330 [2022-11-22 00:18:08,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:08,220 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:18:08,220 INFO L350 Elim1Store]: Elim1 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 331 treesize of output 325 [2022-11-22 00:18:08,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:08,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:08,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:08,256 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 00:18:08,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 335 treesize of output 318 [2022-11-22 00:18:08,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:08,511 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 00:18:08,512 INFO L350 Elim1Store]: Elim1 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 466 treesize of output 363 [2022-11-22 00:18:08,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:08,567 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-22 00:18:08,567 INFO L350 Elim1Store]: Elim1 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 418 treesize of output 412 [2022-11-22 00:18:08,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:08,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:08,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:08,643 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-22 00:18:08,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 406 treesize of output 389 [2022-11-22 00:18:08,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:08,940 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 00:18:08,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:18:08,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:08,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:08,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:08,965 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:18:08,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2022-11-22 00:18:08,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:08,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:08,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:08,982 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:18:08,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:18:09,099 INFO L321 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2022-11-22 00:18:09,100 INFO L350 Elim1Store]: Elim1 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 301 treesize of output 300 [2022-11-22 00:18:09,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:09,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:09,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:09,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:09,194 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-22 00:18:09,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 314 [2022-11-22 00:18:09,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:09,237 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 00:18:09,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 327 treesize of output 330 [2022-11-22 00:18:09,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:09,275 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:18:09,276 INFO L350 Elim1Store]: Elim1 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 331 treesize of output 325 [2022-11-22 00:18:09,555 INFO L321 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-11-22 00:18:09,556 INFO L350 Elim1Store]: Elim1 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 519 treesize of output 392 [2022-11-22 00:18:09,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:09,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:09,653 INFO L321 Elim1Store]: treesize reduction 212, result has 16.2 percent of original size [2022-11-22 00:18:09,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 451 treesize of output 434 [2022-11-22 00:18:09,700 INFO L321 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2022-11-22 00:18:09,701 INFO L350 Elim1Store]: Elim1 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 470 treesize of output 447 [2022-11-22 00:18:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:09,903 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-22 00:18:09,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2022-11-22 00:18:09,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:09,918 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:18:09,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:18:09,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:09,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:09,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-22 00:18:10,918 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:18,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1504988876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:18:18,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:18,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [9, 8, 8] total 34 [2022-11-22 00:18:18,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919828148] [2022-11-22 00:18:18,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:18:18,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 00:18:18,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 00:18:18,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=916, Unknown=4, NotChecked=64, Total=1190 [2022-11-22 00:18:18,199 INFO L87 Difference]: Start difference. First operand 220 states and 250 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:21,571 INFO L93 Difference]: Finished difference Result 243 states and 268 transitions. [2022-11-22 00:18:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 00:18:21,572 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-22 00:18:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:21,573 INFO L225 Difference]: With dead ends: 243 [2022-11-22 00:18:21,574 INFO L226 Difference]: Without dead ends: 243 [2022-11-22 00:18:21,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 70 SyntacticMatches, 19 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=4, NotChecked=78, Total=1722 [2022-11-22 00:18:21,574 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 85 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:21,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 446 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 00:18:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-22 00:18:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 225. [2022-11-22 00:18:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 194 states have (on average 1.3350515463917525) internal successors, (259), 224 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 259 transitions. [2022-11-22 00:18:21,591 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 259 transitions. Word has length 38 [2022-11-22 00:18:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:21,592 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 259 transitions. [2022-11-22 00:18:21,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 259 transitions. [2022-11-22 00:18:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 00:18:21,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:21,593 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-11-22 00:18:21,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:21,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:21,799 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:18:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:21,799 INFO L85 PathProgramCache]: Analyzing trace with hash -991671295, now seen corresponding path program 1 times [2022-11-22 00:18:21,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:21,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612350934] [2022-11-22 00:18:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:21,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:22,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612350934] [2022-11-22 00:18:22,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612350934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:22,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071698603] [2022-11-22 00:18:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:22,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:22,279 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:22,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:18:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:22,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 00:18:22,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:22,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:18:22,530 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:18:22,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:18:22,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:22,640 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:18:22,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:18:22,666 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:18:22,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:18:22,721 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:18:22,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:18:22,764 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:22,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-22 00:18:22,875 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-22 00:18:22,875 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 49 [2022-11-22 00:18:22,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-22 00:18:22,990 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-22 00:18:22,990 INFO L350 Elim1Store]: Elim1 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 56 treesize of output 56 [2022-11-22 00:18:23,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-22 00:18:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:23,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:23,262 INFO L321 Elim1Store]: treesize reduction 5, result has 78.3 percent of original size [2022-11-22 00:18:23,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-11-22 00:18:23,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:23,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-22 00:18:23,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:23,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-22 00:18:23,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:23,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 133 [2022-11-22 00:18:23,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 110 [2022-11-22 00:18:23,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:23,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 108 [2022-11-22 00:18:23,566 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 00:18:23,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-22 00:18:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:23,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071698603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:23,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043592043] [2022-11-22 00:18:23,711 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 00:18:23,711 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:23,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:23,711 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:23,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:18:23,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:23,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:18:23,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:23,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:18:23,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:18:23,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:18:23,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:18:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:18:23,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:18:23,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:18:23,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,905 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-22 00:18:23,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-22 00:18:23,932 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:23,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:18:23,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:23,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,981 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:18:23,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:18:23,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:23,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:24,005 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-22 00:18:24,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 56 [2022-11-22 00:18:24,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:24,025 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:18:24,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-22 00:18:24,137 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:18:24,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:18:24,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:24,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:24,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:24,295 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:18:24,295 INFO L350 Elim1Store]: Elim1 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 175 treesize of output 193 [2022-11-22 00:18:24,386 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:18:24,387 INFO L350 Elim1Store]: Elim1 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 159 treesize of output 153 [2022-11-22 00:18:25,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:25,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:25,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:25,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:25,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:26,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:26,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:26,034 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:18:26,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:18:26,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:26,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:26,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:26,105 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 00:18:26,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2022-11-22 00:18:26,128 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:26,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:26,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:26,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:26,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:26,213 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:26,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2022-11-22 00:18:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:26,245 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:26,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 54 [2022-11-22 00:18:26,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:26,300 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:26,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 62 [2022-11-22 00:18:26,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:26,330 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:26,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 54 [2022-11-22 00:18:26,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:26,428 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:18:26,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:18:26,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:26,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:26,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:26,503 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 00:18:26,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2022-11-22 00:18:26,525 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:26,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:26,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:26,593 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:26,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 61 [2022-11-22 00:18:26,624 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:26,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 61 [2022-11-22 00:18:26,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:26,727 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:26,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 69 [2022-11-22 00:18:26,757 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:26,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 57 [2022-11-22 00:18:26,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:26,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:29,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12666#(and (<= 0 |#NULL.base|) (not (= (select |#valid| |ULTIMATE.start_main_#t~mem7#1.base|) 1)) (= |ULTIMATE.start_main_~status~0#1| 2) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (= |ULTIMATE.start_main_#t~mem7#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (<= 0 |ULTIMATE.start_main_~item~0#1.offset|) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0))) (<= |#NULL.offset| 0) (<= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 00:18:29,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:29,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:29,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 31 [2022-11-22 00:18:29,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117351930] [2022-11-22 00:18:29,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:29,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 00:18:29,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 00:18:29,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2568, Unknown=34, NotChecked=0, Total=2862 [2022-11-22 00:18:29,185 INFO L87 Difference]: Start difference. First operand 225 states and 259 transitions. Second operand has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 32 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) [2022-11-22 00:18:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:33,201 INFO L93 Difference]: Finished difference Result 297 states and 338 transitions. [2022-11-22 00:18:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 00:18:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 32 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 39 [2022-11-22 00:18:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:33,208 INFO L225 Difference]: With dead ends: 297 [2022-11-22 00:18:33,209 INFO L226 Difference]: Without dead ends: 297 [2022-11-22 00:18:33,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=547, Invalid=4530, Unknown=35, NotChecked=0, Total=5112 [2022-11-22 00:18:33,211 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 647 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:33,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1075 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1141 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 00:18:33,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-22 00:18:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 258. [2022-11-22 00:18:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 227 states have (on average 1.3127753303964758) internal successors, (298), 257 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 298 transitions. [2022-11-22 00:18:33,217 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 298 transitions. Word has length 39 [2022-11-22 00:18:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:33,217 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 298 transitions. [2022-11-22 00:18:33,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 32 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) [2022-11-22 00:18:33,218 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 298 transitions. [2022-11-22 00:18:33,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 00:18:33,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:33,218 INFO L195 NwaCegarLoop]: 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, 1, 1] [2022-11-22 00:18:33,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:33,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 00:18:33,425 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:18:33,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:33,426 INFO L85 PathProgramCache]: Analyzing trace with hash -991671294, now seen corresponding path program 1 times [2022-11-22 00:18:33,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:33,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434592766] [2022-11-22 00:18:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:34,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:34,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434592766] [2022-11-22 00:18:34,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434592766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:34,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436458865] [2022-11-22 00:18:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:34,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:34,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:34,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:34,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 00:18:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:34,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-22 00:18:34,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:34,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:18:34,515 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:18:34,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:18:34,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:34,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:34,716 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:18:34,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:18:34,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:34,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 00:18:34,814 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:18:34,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-22 00:18:34,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 00:18:34,840 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 00:18:34,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2022-11-22 00:18:34,970 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:18:34,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:18:35,031 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:18:35,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-22 00:18:35,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 00:18:35,059 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:35,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-22 00:18:35,215 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 00:18:35,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-22 00:18:35,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-22 00:18:35,247 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-22 00:18:35,247 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 51 [2022-11-22 00:18:35,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-22 00:18:35,467 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-22 00:18:35,468 INFO L350 Elim1Store]: Elim1 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 69 [2022-11-22 00:18:35,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:35,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 00:18:35,509 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 00:18:35,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-22 00:18:35,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-22 00:18:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:35,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:18:35,878 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1384 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1384) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_1384 (Array Int Int)) (v_ArrVal_1383 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1384) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1383) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2022-11-22 00:18:36,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:36,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 59 [2022-11-22 00:18:36,087 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1378 (Array Int Int)) (v_ArrVal_1384 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1378) |c_ULTIMATE.start_main_#t~malloc3#1.base| v_ArrVal_1384) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_prenex_12 (Array Int Int)) (v_prenex_11 (Array Int Int))) (< (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_prenex_11) |c_ULTIMATE.start_main_#t~malloc3#1.base| v_prenex_12) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (+ |c_ULTIMATE.start_main_~item~0#1.offset| 1))) (forall ((v_ArrVal_1383 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_#t~malloc3#1.base|)) |c_ULTIMATE.start_main_#t~malloc3#1.base| v_ArrVal_1383) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~item~0#1.base|))) is different from false [2022-11-22 00:18:36,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:36,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-22 00:18:36,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:36,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 86 [2022-11-22 00:18:36,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:36,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 78 [2022-11-22 00:18:36,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:36,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 125 [2022-11-22 00:18:36,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:36,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 194 treesize of output 193 [2022-11-22 00:18:36,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 173 [2022-11-22 00:18:36,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 169 [2022-11-22 00:18:36,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 167 [2022-11-22 00:18:36,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:36,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 164 [2022-11-22 00:18:36,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 151 [2022-11-22 00:18:36,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:18:36,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 158 treesize of output 198 [2022-11-22 00:18:36,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 143 [2022-11-22 00:18:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-22 00:18:37,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436458865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:18:37,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758114574] [2022-11-22 00:18:37,611 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 00:18:37,611 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:18:37,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 00:18:37,611 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 00:18:37,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 00:18:37,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-22 00:18:37,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:37,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-22 00:18:37,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:37,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-22 00:18:37,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:18:37,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-22 00:18:37,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-22 00:18:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-22 00:18:37,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:18:37,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-22 00:18:37,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,806 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-22 00:18:37,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-22 00:18:37,831 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:37,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-22 00:18:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:37,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:18:37,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-22 00:18:37,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:37,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-22 00:18:38,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:18:38,026 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:18:38,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:38,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:38,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:38,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:38,176 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:18:38,176 INFO L350 Elim1Store]: Elim1 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 172 treesize of output 166 [2022-11-22 00:18:38,247 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-22 00:18:38,248 INFO L350 Elim1Store]: Elim1 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 132 treesize of output 150 [2022-11-22 00:18:39,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:39,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:39,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:39,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:39,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:39,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-22 00:18:39,437 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:18:39,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:18:39,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:39,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:39,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:39,503 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:39,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:39,534 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 00:18:39,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2022-11-22 00:18:39,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:39,619 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:39,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 61 [2022-11-22 00:18:39,652 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:39,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 57 [2022-11-22 00:18:39,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:39,718 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:39,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 69 [2022-11-22 00:18:39,754 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:39,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 57 [2022-11-22 00:18:39,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:39,807 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 00:18:39,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-22 00:18:39,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:39,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:39,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:39,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-22 00:18:39,892 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-22 00:18:39,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2022-11-22 00:18:39,916 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:39,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:39,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:40,000 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:40,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 61 [2022-11-22 00:18:40,036 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:40,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 57 [2022-11-22 00:18:40,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 00:18:40,133 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:40,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 69 [2022-11-22 00:18:40,167 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-22 00:18:40,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 57 [2022-11-22 00:18:40,239 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 00:18:43,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13544#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~status~0#1| 2) (not (= |ULTIMATE.start_main_~head~0#1.base| 0)) (= |ULTIMATE.start_main_#t~mem7#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (= |ULTIMATE.start_main_#t~mem7#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|)) (<= 0 |ULTIMATE.start_main_~item~0#1.offset|) (<= (+ |ULTIMATE.start_main_~head~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~head~0#1.base|)) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~head~0#1.base|) |ULTIMATE.start_main_~head~0#1.offset|) 0))) (<= |#NULL.offset| 0) (or (not (<= 0 |ULTIMATE.start_main_#t~mem7#1.offset|)) (not (<= (+ |ULTIMATE.start_main_#t~mem7#1.offset| 4) (select |#length| |ULTIMATE.start_main_#t~mem7#1.base|)))) (<= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_main_~head~0#1.base|) 1) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-22 00:18:43,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 00:18:43,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:18:43,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2022-11-22 00:18:43,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955139720] [2022-11-22 00:18:43,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:18:43,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-22 00:18:43,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:18:43,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-22 00:18:43,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=2892, Unknown=22, NotChecked=222, Total=3422 [2022-11-22 00:18:43,085 INFO L87 Difference]: Start difference. First operand 258 states and 298 transitions. Second operand has 37 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:18:52,510 INFO L93 Difference]: Finished difference Result 290 states and 330 transitions. [2022-11-22 00:18:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 00:18:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-22 00:18:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:18:52,512 INFO L225 Difference]: With dead ends: 290 [2022-11-22 00:18:52,512 INFO L226 Difference]: Without dead ends: 290 [2022-11-22 00:18:52,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=600, Invalid=5086, Unknown=22, NotChecked=298, Total=6006 [2022-11-22 00:18:52,514 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 460 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 00:18:52,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1218 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1246 Invalid, 1 Unknown, 304 Unchecked, 1.4s Time] [2022-11-22 00:18:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-22 00:18:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 258. [2022-11-22 00:18:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 227 states have (on average 1.3083700440528634) internal successors, (297), 257 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 297 transitions. [2022-11-22 00:18:52,520 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 297 transitions. Word has length 39 [2022-11-22 00:18:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:18:52,520 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 297 transitions. [2022-11-22 00:18:52,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.2222222222222223) internal successors, (116), 37 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:18:52,521 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 297 transitions. [2022-11-22 00:18:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 00:18:52,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:18:52,521 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-11-22 00:18:52,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 00:18:52,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-22 00:18:52,732 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-11-22 00:18:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:18:52,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1978581585, now seen corresponding path program 1 times [2022-11-22 00:18:52,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:18:52,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357439546] [2022-11-22 00:18:52,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:52,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:18:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:53,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:18:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357439546] [2022-11-22 00:18:53,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357439546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:18:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769207056] [2022-11-22 00:18:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:18:53,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:18:53,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:18:53,459 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:18:53,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73839742-40cc-453f-b4a8-2c6f61a60b44/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 00:18:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:18:53,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-22 00:18:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:18:53,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 00:18:53,772 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 00:18:53,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-22 00:18:53,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:53,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 00:18:53,973 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-22 00:18:53,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-22 00:18:53,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:54,001 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 00:18:54,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-22 00:18:54,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 00:18:54,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:54,094 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:18:54,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 70 [2022-11-22 00:18:54,112 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-22 00:18:54,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2022-11-22 00:18:54,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:18:54,697 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 00:18:54,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2022-11-22 00:18:54,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2022-11-22 00:18:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:18:54,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:19:00,160 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:19:00,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 57924 treesize of output 52361 [2022-11-22 00:19:03,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:19:05,914 INFO L321 Elim1Store]: treesize reduction 624, result has 48.3 percent of original size [2022-11-22 00:19:05,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 369067 treesize of output 353860 [2022-11-22 00:19:38,400 WARN L233 SmtUtils]: Spent 32.48s on a formula simplification. DAG size of input: 1419 DAG size of output: 1359 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-22 00:19:40,595 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 00:19:40,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 410094 treesize of output 355224 [2022-11-22 00:19:43,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-22 00:19:51,049 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:19:51,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:19:51,637 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:19:51,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:19:52,075 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:19:52,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:19:52,387 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:19:52,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-22 00:19:52,940 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:19:52,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:01,688 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:01,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:03,597 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:20:03,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 81 [2022-11-22 00:20:05,376 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:05,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:06,064 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:20:06,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 102 [2022-11-22 00:20:06,766 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:20:06,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 183 treesize of output 203 [2022-11-22 00:20:13,295 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:20:13,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 97 [2022-11-22 00:20:14,242 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:14,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:16,189 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:16,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:17,686 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:20:17,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 81 [2022-11-22 00:20:38,306 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:20:38,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 97 [2022-11-22 00:20:39,372 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:39,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:39,740 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:20:39,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 127 [2022-11-22 00:20:42,315 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:20:42,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 169 treesize of output 171 [2022-11-22 00:20:43,998 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:43,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 117 [2022-11-22 00:20:46,681 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:20:46,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 139 [2022-11-22 00:20:47,452 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:47,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 117 [2022-11-22 00:20:48,833 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:20:48,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 97 [2022-11-22 00:20:50,195 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:50,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:50,402 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:50,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:50,851 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:50,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:51,284 INFO L321 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-11-22 00:20:51,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 85 treesize of output 73 [2022-11-22 00:20:51,768 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 00:20:52,211 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-22 00:20:52,954 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:20:52,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 107 [2022-11-22 00:20:54,931 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:54,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:55,204 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:20:55,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 121 treesize of output 133 [2022-11-22 00:20:58,487 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:58,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:58,757 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:20:58,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-22 00:20:59,210 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:59,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:20:59,797 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:20:59,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:00,074 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:21:00,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-22 00:21:00,534 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:21:00,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 144 treesize of output 156 [2022-11-22 00:21:04,259 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:21:04,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 143 treesize of output 155 [2022-11-22 00:21:07,786 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:21:07,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:08,147 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:21:08,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:08,801 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:21:08,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-22 00:21:09,925 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:21:09,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:10,316 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:21:10,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 129 [2022-11-22 00:21:13,220 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:21:13,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:14,059 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:21:14,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 97 [2022-11-22 00:21:15,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 00:21:15,147 INFO L321 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-11-22 00:21:15,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:16,464 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:21:16,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 113 [2022-11-22 00:21:18,620 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:21:18,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:19,214 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-22 00:21:19,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 133 [2022-11-22 00:21:23,151 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:21:23,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:23,443 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:21:23,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-22 00:21:24,064 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:21:24,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:24,709 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:21:24,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-11-22 00:21:25,413 INFO L321 Elim1Store]: treesize reduction 81, result has 9.0 percent of original size [2022-11-22 00:21:25,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 71 [2022-11-22 00:21:26,156 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-22 00:21:26,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59