./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:20:25,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:20:25,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:20:25,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:20:25,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:20:25,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:20:25,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:20:25,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:20:25,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:20:25,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:20:25,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:20:25,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:20:25,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:20:25,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:20:25,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:20:25,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:20:25,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:20:25,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:20:25,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:20:25,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:20:25,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:20:25,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:20:25,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:20:25,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:20:25,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:20:25,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:20:25,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:20:25,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:20:25,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:20:25,940 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:20:25,940 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:20:25,941 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:20:25,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:20:25,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:20:25,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:20:25,946 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:20:25,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:20:25,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:20:25,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:20:25,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:20:25,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:20:25,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:20:25,992 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:20:25,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:20:25,993 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:20:25,993 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:20:26,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:20:26,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:20:26,000 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:20:26,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:20:26,001 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:20:26,001 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:20:26,002 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:20:26,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:20:26,003 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:20:26,003 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:20:26,003 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:20:26,003 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:20:26,004 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:20:26,004 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:20:26,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:20:26,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:20:26,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:20:26,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:20:26,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:20:26,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:20:26,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:20:26,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:20:26,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:20:26,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:20:26,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:20:26,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:26,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:20:26,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:20:26,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:20:26,008 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:20:26,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:20:26,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:20:26,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:20:26,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:20:26,009 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2021-11-21 01:20:26,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:20:26,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:20:26,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:20:26,350 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:20:26,350 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:20:26,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-21 01:20:26,424 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/data/18e21ff7c/e52e9bc1d69449bab03c6864de30852f/FLAG67c5723d2 [2021-11-21 01:20:27,202 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:20:27,203 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2021-11-21 01:20:27,242 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/data/18e21ff7c/e52e9bc1d69449bab03c6864de30852f/FLAG67c5723d2 [2021-11-21 01:20:27,264 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/data/18e21ff7c/e52e9bc1d69449bab03c6864de30852f [2021-11-21 01:20:27,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:20:27,269 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:20:27,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:27,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:20:27,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:20:27,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:27" (1/1) ... [2021-11-21 01:20:27,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45360164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:27, skipping insertion in model container [2021-11-21 01:20:27,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:20:27" (1/1) ... [2021-11-21 01:20:27,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:20:27,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:20:27,708 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-21 01:20:27,716 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-21 01:20:28,500 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,501 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,501 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,502 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,503 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,518 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,519 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,521 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,522 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,523 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,523 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:28,875 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:20:28,876 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:20:28,877 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:20:28,878 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:20:28,880 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:20:28,881 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:20:28,881 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:20:28,882 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:20:28,884 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:20:28,885 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:20:29,023 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:20:29,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:29,064 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:20:29,078 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2021-11-21 01:20:29,078 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2021-11-21 01:20:29,122 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,123 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,123 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,124 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,125 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,133 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,134 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,135 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,136 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,137 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,138 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,139 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,139 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:20:29,198 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:20:29,199 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:20:29,200 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:20:29,201 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:20:29,202 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:20:29,203 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:20:29,203 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:20:29,204 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:20:29,204 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:20:29,205 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:20:29,250 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:20:29,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:20:29,589 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:20:29,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29 WrapperNode [2021-11-21 01:20:29,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:20:29,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:29,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:20:29,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:20:29,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,752 INFO L137 Inliner]: procedures = 679, calls = 1045, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 134 [2021-11-21 01:20:29,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:20:29,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:20:29,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:20:29,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:20:29,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:20:29,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:20:29,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:20:29,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:20:29,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (1/1) ... [2021-11-21 01:20:29,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:20:29,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:29,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:20:29,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:20:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:20:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:20:29,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:20:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:20:29,912 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-21 01:20:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:20:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-21 01:20:29,913 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-21 01:20:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:20:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:20:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2021-11-21 01:20:29,913 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2021-11-21 01:20:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:20:29,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:20:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-21 01:20:29,914 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-21 01:20:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:20:29,914 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:20:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:20:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:20:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:20:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 01:20:29,915 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 01:20:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-21 01:20:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-21 01:20:29,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:20:30,182 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:20:30,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:20:30,516 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:20:30,655 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:20:30,655 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:20:30,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:30 BoogieIcfgContainer [2021-11-21 01:20:30,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:20:30,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:20:30,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:20:30,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:20:30,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:20:27" (1/3) ... [2021-11-21 01:20:30,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b264ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:30, skipping insertion in model container [2021-11-21 01:20:30,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:20:29" (2/3) ... [2021-11-21 01:20:30,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b264ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:20:30, skipping insertion in model container [2021-11-21 01:20:30,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:20:30" (3/3) ... [2021-11-21 01:20:30,668 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2021-11-21 01:20:30,676 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:20:30,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:20:30,738 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:20:30,744 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:20:30,744 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:20:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-21 01:20:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 01:20:30,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:30,771 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:30,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1216931554, now seen corresponding path program 1 times [2021-11-21 01:20:30,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:30,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016175728] [2021-11-21 01:20:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:30,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 01:20:31,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:31,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016175728] [2021-11-21 01:20:31,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016175728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:31,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042905376] [2021-11-21 01:20:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:31,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:31,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:31,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:31,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:20:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:31,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-21 01:20:31,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 01:20:31,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 01:20:31,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-21 01:20:31,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:31,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-21 01:20:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:20:35,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:20:35,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042905376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:20:35,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:20:35,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2021-11-21 01:20:35,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117019073] [2021-11-21 01:20:35,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:20:35,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 01:20:35,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:20:35,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 01:20:35,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:20:35,883 INFO L87 Difference]: Start difference. First operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-21 01:20:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:20:36,192 INFO L93 Difference]: Finished difference Result 147 states and 212 transitions. [2021-11-21 01:20:36,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:20:36,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2021-11-21 01:20:36,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:20:36,205 INFO L225 Difference]: With dead ends: 147 [2021-11-21 01:20:36,206 INFO L226 Difference]: Without dead ends: 101 [2021-11-21 01:20:36,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:20:36,212 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 13 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:20:36,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 286 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2021-11-21 01:20:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-21 01:20:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2021-11-21 01:20:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (33), 30 states have call predecessors, (33), 32 states have call successors, (33) [2021-11-21 01:20:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 120 transitions. [2021-11-21 01:20:36,266 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 120 transitions. Word has length 52 [2021-11-21 01:20:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:20:36,267 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 120 transitions. [2021-11-21 01:20:36,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-21 01:20:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 120 transitions. [2021-11-21 01:20:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-21 01:20:36,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:20:36,271 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:20:36,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:20:36,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:36,500 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:20:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:20:36,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1311656922, now seen corresponding path program 1 times [2021-11-21 01:20:36,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:20:36,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153962698] [2021-11-21 01:20:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:36,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:20:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 01:20:36,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:20:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153962698] [2021-11-21 01:20:36,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153962698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:20:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486982122] [2021-11-21 01:20:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:20:36,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:20:36,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:20:36,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:20:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:20:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:20:36,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-21 01:20:36,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:20:36,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:20:36,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:36,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 01:20:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 01:20:37,078 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:20:37,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-11-21 01:20:37,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-21 01:20:37,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 75 [2021-11-21 01:20:37,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,342 INFO L354 Elim1Store]: treesize reduction 264, result has 14.8 percent of original size [2021-11-21 01:20:37,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 185 treesize of output 139 [2021-11-21 01:20:37,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:20:37,429 INFO L354 Elim1Store]: treesize reduction 310, result has 15.8 percent of original size [2021-11-21 01:20:37,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 178 treesize of output 160 [2021-11-21 01:20:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:20:44,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:21:11,545 WARN L227 SmtUtils]: Spent 6.40s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:21:25,630 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 01:21:25,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212930 treesize of output 212242 [2021-11-21 01:21:37,176 WARN L227 SmtUtils]: Spent 11.54s on a formula simplification. DAG size of input: 1188 DAG size of output: 1188 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:21:37,352 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 01:21:37,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1928314 treesize of output 1923134 [2021-11-21 01:22:52,043 WARN L227 SmtUtils]: Spent 1.24m on a formula simplification. DAG size of input: 2361 DAG size of output: 2355 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 01:22:52,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 01:22:52,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [342137861] [2021-11-21 01:22:52,192 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 01:22:52,192 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:22:52,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:22:52,201 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:22:52,202 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:22:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:52,324 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 01:22:52,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2021-11-21 01:22:52,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:52,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:52,529 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:22:52,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:22:54,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:22:54,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 01:22:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:22:55,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 01:22:55,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:55,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:55,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:55,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:55,417 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 01:22:55,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 01:22:55,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,594 INFO L354 Elim1Store]: treesize reduction 66, result has 41.1 percent of original size [2021-11-21 01:22:55,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 01:22:55,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:55,754 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:22:55,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 01:22:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:55,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:22:56,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 28 [2021-11-21 01:22:56,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,244 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 01:22:56,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 01:22:56,351 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 01:22:56,354 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 01:22:56,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:56,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:56,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:56,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:56,883 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 01:22:56,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 425 treesize of output 453 [2021-11-21 01:22:57,281 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 01:22:57,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 492 treesize of output 582 [2021-11-21 01:22:57,686 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 01:22:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 576 treesize of output 657 [2021-11-21 01:22:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:57,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:57,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:57,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:22:57,993 INFO L354 Elim1Store]: treesize reduction 370, result has 20.4 percent of original size [2021-11-21 01:22:57,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 657 treesize of output 679 [2021-11-21 01:22:58,105 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 01:22:58,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 724 treesize of output 695 [2021-11-21 01:22:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:22:58,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 692 treesize of output 679 [2021-11-21 01:22:58,255 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:22:58,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 628 [2021-11-21 01:23:09,158 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:23:09,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 01:23:09,189 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 01:23:09,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 01:23:09,210 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:23:09,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 94 [2021-11-21 01:23:09,239 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:23:09,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 01:23:09,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:23:09,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:23:09,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:09,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:23:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:09,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:23:09,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:09,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:23:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:09,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:09,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 01:23:11,283 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 25 for LOIs [2021-11-21 01:23:12,580 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 50 for LOIs [2021-11-21 01:23:13,441 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 01:23:14,652 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 01:23:14,687 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 01:23:14,784 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:23:24,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [342137861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:23:24,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:23:24,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [5] total 24 [2021-11-21 01:23:24,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964998678] [2021-11-21 01:23:24,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:24,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:23:24,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:23:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:23:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1505, Unknown=10, NotChecked=0, Total=1640 [2021-11-21 01:23:24,268 INFO L87 Difference]: Start difference. First operand 90 states and 120 transitions. Second operand has 21 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 11 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 01:23:25,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:25,741 INFO L93 Difference]: Finished difference Result 161 states and 208 transitions. [2021-11-21 01:23:25,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:23:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 11 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 53 [2021-11-21 01:23:25,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:25,745 INFO L225 Difference]: With dead ends: 161 [2021-11-21 01:23:25,745 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 01:23:25,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 98 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=139, Invalid=1657, Unknown=10, NotChecked=0, Total=1806 [2021-11-21 01:23:25,748 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 31 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:25,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 370 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 574 Invalid, 0 Unknown, 188 Unchecked, 0.9s Time] [2021-11-21 01:23:25,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 01:23:25,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-21 01:23:25,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 46 states have (on average 1.173913043478261) internal successors, (54), 48 states have internal predecessors, (54), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 01:23:25,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-11-21 01:23:25,769 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 53 [2021-11-21 01:23:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:25,770 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-11-21 01:23:25,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 11 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 01:23:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-11-21 01:23:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 01:23:25,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:25,773 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:25,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:25,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:25,995 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:25,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:25,996 INFO L85 PathProgramCache]: Analyzing trace with hash -662497062, now seen corresponding path program 1 times [2021-11-21 01:23:25,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:23:25,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337705253] [2021-11-21 01:23:25,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:25,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:23:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:23:26,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:23:26,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337705253] [2021-11-21 01:23:26,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337705253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:23:26,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298811479] [2021-11-21 01:23:26,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:26,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:26,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:26,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:23:26,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:23:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:26,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:23:26,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:23:26,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:23:26,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298811479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:23:26,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:23:26,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-21 01:23:26,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67128028] [2021-11-21 01:23:26,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:26,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:23:26,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:23:26,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:23:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:23:26,417 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 01:23:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:26,609 INFO L93 Difference]: Finished difference Result 150 states and 195 transitions. [2021-11-21 01:23:26,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:23:26,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 54 [2021-11-21 01:23:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:26,612 INFO L225 Difference]: With dead ends: 150 [2021-11-21 01:23:26,612 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 01:23:26,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:23:26,614 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 45 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:26,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 399 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:23:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 01:23:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-21 01:23:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 48 states have internal predecessors, (53), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 01:23:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2021-11-21 01:23:26,634 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 54 [2021-11-21 01:23:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:26,635 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2021-11-21 01:23:26,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 01:23:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2021-11-21 01:23:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 01:23:26,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:26,638 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:26,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:26,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:26,860 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:26,861 INFO L85 PathProgramCache]: Analyzing trace with hash 630654178, now seen corresponding path program 1 times [2021-11-21 01:23:26,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:23:26,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636987192] [2021-11-21 01:23:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:26,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:23:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:23:27,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:23:27,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636987192] [2021-11-21 01:23:27,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636987192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:23:27,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369944087] [2021-11-21 01:23:27,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:27,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:27,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:27,024 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:23:27,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:23:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:27,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:23:27,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:23:27,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:23:27,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369944087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:23:27,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:23:27,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2021-11-21 01:23:27,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517989831] [2021-11-21 01:23:27,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:27,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:23:27,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:23:27,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:23:27,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:23:27,336 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 01:23:27,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:27,544 INFO L93 Difference]: Finished difference Result 159 states and 209 transitions. [2021-11-21 01:23:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:23:27,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 56 [2021-11-21 01:23:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:27,546 INFO L225 Difference]: With dead ends: 159 [2021-11-21 01:23:27,547 INFO L226 Difference]: Without dead ends: 98 [2021-11-21 01:23:27,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:23:27,548 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:27,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 453 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:23:27,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-21 01:23:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2021-11-21 01:23:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 01:23:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 115 transitions. [2021-11-21 01:23:27,571 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 115 transitions. Word has length 56 [2021-11-21 01:23:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:27,572 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 115 transitions. [2021-11-21 01:23:27,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-21 01:23:27,572 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 115 transitions. [2021-11-21 01:23:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-21 01:23:27,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:27,574 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:27,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:27,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:27,784 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:27,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2018481229, now seen corresponding path program 1 times [2021-11-21 01:23:27,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:23:27,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307262850] [2021-11-21 01:23:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:27,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:23:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:23:27,992 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:23:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307262850] [2021-11-21 01:23:27,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307262850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:23:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536167441] [2021-11-21 01:23:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:27,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:27,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:27,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:23:28,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:23:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:28,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:23:28,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:23:28,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:23:28,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536167441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:23:28,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:23:28,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-11-21 01:23:28,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383885141] [2021-11-21 01:23:28,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:28,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:23:28,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:23:28,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:23:28,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:23:28,266 INFO L87 Difference]: Start difference. First operand 91 states and 115 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:23:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:28,325 INFO L93 Difference]: Finished difference Result 155 states and 205 transitions. [2021-11-21 01:23:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:23:28,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 58 [2021-11-21 01:23:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:28,327 INFO L225 Difference]: With dead ends: 155 [2021-11-21 01:23:28,328 INFO L226 Difference]: Without dead ends: 97 [2021-11-21 01:23:28,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:23:28,329 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:28,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:23:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-21 01:23:28,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2021-11-21 01:23:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 50 states have internal predecessors, (55), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 01:23:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 116 transitions. [2021-11-21 01:23:28,350 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 116 transitions. Word has length 58 [2021-11-21 01:23:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:28,350 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 116 transitions. [2021-11-21 01:23:28,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:23:28,350 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 116 transitions. [2021-11-21 01:23:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 01:23:28,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:28,351 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:28,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:28,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:28,552 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1947211257, now seen corresponding path program 1 times [2021-11-21 01:23:28,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:23:28,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337674604] [2021-11-21 01:23:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:28,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:23:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 01:23:28,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:23:28,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337674604] [2021-11-21 01:23:28,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337674604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:23:28,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738207664] [2021-11-21 01:23:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:28,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:28,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:23:28,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:23:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:23:28,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-21 01:23:29,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:23:29,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738207664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:23:29,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:23:29,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 13 [2021-11-21 01:23:29,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257347513] [2021-11-21 01:23:29,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:23:29,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:23:29,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:23:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:23:29,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:23:29,034 INFO L87 Difference]: Start difference. First operand 92 states and 116 transitions. Second operand has 11 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 01:23:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:23:29,253 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2021-11-21 01:23:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:23:29,254 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 60 [2021-11-21 01:23:29,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:23:29,256 INFO L225 Difference]: With dead ends: 154 [2021-11-21 01:23:29,256 INFO L226 Difference]: Without dead ends: 95 [2021-11-21 01:23:29,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:23:29,257 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 18 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:23:29,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 555 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:23:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-21 01:23:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-11-21 01:23:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 51 states have internal predecessors, (56), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 01:23:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 117 transitions. [2021-11-21 01:23:29,278 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 117 transitions. Word has length 60 [2021-11-21 01:23:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:23:29,278 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 117 transitions. [2021-11-21 01:23:29,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 01:23:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 117 transitions. [2021-11-21 01:23:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 01:23:29,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:23:29,280 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:23:29,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:23:29,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:23:29,499 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:23:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:23:29,499 INFO L85 PathProgramCache]: Analyzing trace with hash 575582167, now seen corresponding path program 1 times [2021-11-21 01:23:29,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:23:29,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089293526] [2021-11-21 01:23:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:29,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:23:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:23:29,677 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:23:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089293526] [2021-11-21 01:23:29,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089293526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:23:29,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782223465] [2021-11-21 01:23:29,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:23:29,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:23:29,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:23:29,678 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:23:29,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:23:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:23:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-21 01:23:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:23:29,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:23:30,008 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:23:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:23:30,019 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:23:30,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 01:23:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:30,100 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-21 01:23:30,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 47 [2021-11-21 01:23:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:23:31,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:23:32,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 780 treesize of output 772 [2021-11-21 01:23:33,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782223465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:23:33,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100026304] [2021-11-21 01:23:33,292 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-21 01:23:33,293 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:23:33,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:23:33,293 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:23:33,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:23:33,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:33,380 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 01:23:33,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2021-11-21 01:23:33,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:33,533 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:23:33,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:23:35,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:23:35,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 01:23:35,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:23:35,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 01:23:35,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 01:23:35,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:35,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:35,724 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 01:23:35,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 01:23:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,896 INFO L354 Elim1Store]: treesize reduction 66, result has 41.1 percent of original size [2021-11-21 01:23:35,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 01:23:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:35,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,053 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 01:23:36,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 01:23:36,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:23:36,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 01:23:36,339 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 01:23:36,340 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 01:23:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:36,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:36,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:36,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:36,862 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 01:23:36,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 425 treesize of output 453 [2021-11-21 01:23:37,202 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 01:23:37,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 510 treesize of output 591 [2021-11-21 01:23:37,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:37,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:37,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:23:37,434 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 01:23:37,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 591 treesize of output 607 [2021-11-21 01:23:37,762 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 01:23:37,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 640 treesize of output 730 [2021-11-21 01:23:37,840 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 01:23:37,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 724 treesize of output 695 [2021-11-21 01:23:37,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:37,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 692 treesize of output 679 [2021-11-21 01:23:37,954 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:23:37,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 628 [2021-11-21 01:23:48,161 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:23:48,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 01:23:48,190 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 01:23:48,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 01:23:48,209 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:23:48,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 94 [2021-11-21 01:23:48,231 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:23:48,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 01:23:48,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:23:48,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:23:48,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:48,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:23:48,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:48,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:48,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 01:23:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:48,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:23:48,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:23:48,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:23:50,071 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 25 for LOIs [2021-11-21 01:23:52,344 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 49 for LOIs [2021-11-21 01:23:52,949 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 01:23:58,071 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 01:23:58,116 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 01:23:58,215 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 01:23:58,673 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:24:02,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [100026304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:24:02,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:24:02,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 14] total 50 [2021-11-21 01:24:02,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701496094] [2021-11-21 01:24:02,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:24:02,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 01:24:02,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 01:24:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3417, Unknown=1, NotChecked=0, Total=3660 [2021-11-21 01:24:02,546 INFO L87 Difference]: Start difference. First operand 93 states and 117 transitions. Second operand has 29 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-21 01:24:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:05,287 INFO L93 Difference]: Finished difference Result 163 states and 205 transitions. [2021-11-21 01:24:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-21 01:24:05,288 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 63 [2021-11-21 01:24:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:05,289 INFO L225 Difference]: With dead ends: 163 [2021-11-21 01:24:05,289 INFO L226 Difference]: Without dead ends: 101 [2021-11-21 01:24:05,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=337, Invalid=4218, Unknown=1, NotChecked=0, Total=4556 [2021-11-21 01:24:05,292 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 57 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:05,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 299 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 754 Invalid, 0 Unknown, 167 Unchecked, 1.0s Time] [2021-11-21 01:24:05,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-21 01:24:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-11-21 01:24:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 53 states have internal predecessors, (58), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (31), 27 states have call predecessors, (31), 29 states have call successors, (31) [2021-11-21 01:24:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-11-21 01:24:05,311 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 63 [2021-11-21 01:24:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:05,311 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-11-21 01:24:05,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 20 states have (on average 1.4) internal successors, (28), 17 states have internal predecessors, (28), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-21 01:24:05,312 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-11-21 01:24:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-21 01:24:05,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:05,313 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:05,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:05,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:05,519 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash 658052454, now seen corresponding path program 1 times [2021-11-21 01:24:05,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:05,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567654022] [2021-11-21 01:24:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:05,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:24:05,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:05,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567654022] [2021-11-21 01:24:05,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567654022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:24:05,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299328985] [2021-11-21 01:24:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:05,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:05,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:05,927 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:05,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:24:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:06,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-21 01:24:06,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:06,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:24:06,260 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 01:24:06,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-21 01:24:06,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:06,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 01:24:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:06,349 INFO L354 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2021-11-21 01:24:06,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 47 [2021-11-21 01:24:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:24:10,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:24:23,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1669 treesize of output 1653 [2021-11-21 01:24:23,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299328985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:24:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [149205892] [2021-11-21 01:24:23,692 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-21 01:24:23,692 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:24:23,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:24:23,692 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:24:23,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:24:23,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:23,797 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:24:23,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:24:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:23,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 01:24:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:24:25,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 01:24:25,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:24:25,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:25,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 01:24:26,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 28 [2021-11-21 01:24:26,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,164 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 01:24:26,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 01:24:26,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,314 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 01:24:26,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 01:24:26,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:24:26,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:26,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 01:24:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 01:24:26,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:26,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:27,095 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 01:24:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 425 treesize of output 453 [2021-11-21 01:24:27,519 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 01:24:27,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 492 treesize of output 573 [2021-11-21 01:24:27,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:27,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:27,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:24:27,791 INFO L354 Elim1Store]: treesize reduction 370, result has 20.4 percent of original size [2021-11-21 01:24:27,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 573 treesize of output 595 [2021-11-21 01:24:27,895 INFO L354 Elim1Store]: treesize reduction 118, result has 17.5 percent of original size [2021-11-21 01:24:27,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 640 treesize of output 611 [2021-11-21 01:24:27,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:27,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 608 treesize of output 595 [2021-11-21 01:24:28,283 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 01:24:28,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 589 treesize of output 679 [2021-11-21 01:24:28,400 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:24:28,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 628 [2021-11-21 01:24:38,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:24:38,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:24:38,390 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:24:38,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 01:24:38,416 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:24:38,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 146 [2021-11-21 01:24:38,446 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:24:38,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-21 01:24:38,472 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:24:38,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 01:24:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:38,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:24:38,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:38,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:24:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:38,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:38,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 01:24:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:24:38,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:24:40,276 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 25 for LOIs [2021-11-21 01:24:43,450 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 53 for LOIs [2021-11-21 01:24:43,803 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-21 01:24:43,902 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 01:24:48,870 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 01:24:48,909 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 01:24:49,008 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 01:24:49,567 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:24:54,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:24:54,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:24:54,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-21 01:24:54,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191515063] [2021-11-21 01:24:54,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:24:54,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:24:54,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:24:54,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:24:54,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=4823, Unknown=7, NotChecked=0, Total=5112 [2021-11-21 01:24:54,489 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-21 01:24:57,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:24:57,553 INFO L93 Difference]: Finished difference Result 247 states and 326 transitions. [2021-11-21 01:24:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:24:57,554 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 64 [2021-11-21 01:24:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:24:57,557 INFO L225 Difference]: With dead ends: 247 [2021-11-21 01:24:57,557 INFO L226 Difference]: Without dead ends: 171 [2021-11-21 01:24:57,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=377, Invalid=6095, Unknown=8, NotChecked=0, Total=6480 [2021-11-21 01:24:57,560 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 113 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:24:57,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 1364 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 538 Invalid, 0 Unknown, 248 Unchecked, 0.6s Time] [2021-11-21 01:24:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-21 01:24:57,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 140. [2021-11-21 01:24:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 80 states have (on average 1.15) internal successors, (92), 84 states have internal predecessors, (92), 39 states have call successors, (39), 21 states have call predecessors, (39), 20 states have return successors, (44), 34 states have call predecessors, (44), 38 states have call successors, (44) [2021-11-21 01:24:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2021-11-21 01:24:57,588 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 64 [2021-11-21 01:24:57,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:24:57,588 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2021-11-21 01:24:57,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-21 01:24:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2021-11-21 01:24:57,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 01:24:57,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:24:57,590 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:24:57,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:24:57,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:57,804 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:24:57,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:24:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1898276206, now seen corresponding path program 1 times [2021-11-21 01:24:57,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:24:57,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717515739] [2021-11-21 01:24:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:57,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:24:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 01:24:58,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:24:58,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717515739] [2021-11-21 01:24:58,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717515739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:24:58,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113582868] [2021-11-21 01:24:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:24:58,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:24:58,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:24:58,265 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:24:58,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:24:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:24:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-21 01:24:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:24:58,518 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 01:24:58,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-11-21 01:24:58,528 INFO L354 Elim1Store]: treesize reduction 15, result has 50.0 percent of original size [2021-11-21 01:24:58,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 41 [2021-11-21 01:25:07,512 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 01:25:07,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-21 01:25:12,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113582868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:12,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102648087] [2021-11-21 01:25:12,208 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-21 01:25:12,208 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:25:12,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:25:12,209 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:25:12,209 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:25:12,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:12,279 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 01:25:12,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2021-11-21 01:25:12,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:12,382 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:25:12,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:25:14,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:25:14,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 01:25:14,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 01:25:14,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:25:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-21 01:25:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 01:25:14,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 01:25:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:14,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:25:18,135 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 123 for LOIs [2021-11-21 01:25:19,804 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2021-11-21 01:25:19,823 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 01:25:19,980 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:25:23,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2102648087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:25:23,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:25:23,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15, 18, 10] total 50 [2021-11-21 01:25:23,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402804252] [2021-11-21 01:25:23,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:25:23,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:25:23,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:25:23,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:25:23,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2221, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:25:23,290 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 01:25:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:25:24,114 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2021-11-21 01:25:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:25:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 63 [2021-11-21 01:25:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:25:24,116 INFO L225 Difference]: With dead ends: 211 [2021-11-21 01:25:24,116 INFO L226 Difference]: Without dead ends: 126 [2021-11-21 01:25:24,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 139 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=229, Invalid=2221, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:25:24,118 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 81 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:25:24,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 217 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 329 Invalid, 0 Unknown, 60 Unchecked, 0.8s Time] [2021-11-21 01:25:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-21 01:25:24,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-21 01:25:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 77 states have internal predecessors, (84), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (38), 31 states have call predecessors, (38), 33 states have call successors, (38) [2021-11-21 01:25:24,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 156 transitions. [2021-11-21 01:25:24,147 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 156 transitions. Word has length 63 [2021-11-21 01:25:24,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:25:24,148 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 156 transitions. [2021-11-21 01:25:24,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 01:25:24,148 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 156 transitions. [2021-11-21 01:25:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-21 01:25:24,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:25:24,151 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:25:24,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:25:24,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 01:25:24,372 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:25:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:25:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1765234145, now seen corresponding path program 2 times [2021-11-21 01:25:24,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:25:24,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86235870] [2021-11-21 01:25:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:25:24,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:25:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:25:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 01:25:25,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:25:25,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86235870] [2021-11-21 01:25:25,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86235870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:25:25,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223733923] [2021-11-21 01:25:25,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:25:25,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:25:25,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:25:25,156 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:25:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:25:25,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:25:25,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:25:25,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-21 01:25:25,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:25:25,787 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-11-21 01:25:25,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2021-11-21 01:25:26,010 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:25:26,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-21 01:25:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 01:25:46,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:25:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-21 01:25:53,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223733923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:25:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114256272] [2021-11-21 01:25:53,301 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2021-11-21 01:25:53,301 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:25:53,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:25:53,302 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:25:53,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:25:53,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:53,364 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 01:25:53,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 58 [2021-11-21 01:25:53,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:53,466 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:25:53,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:25:55,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 01:25:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 01:25:55,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:25:55,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 01:25:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,844 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 01:25:55,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 01:25:55,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:25:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 28 [2021-11-21 01:25:55,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:55,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:56,042 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 01:25:56,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 01:25:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,211 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 01:25:56,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 01:25:56,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:56,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 01:25:56,404 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 01:25:56,405 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2021-11-21 01:25:56,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:56,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:56,853 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 01:25:56,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 425 treesize of output 453 [2021-11-21 01:25:57,214 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 01:25:57,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 510 treesize of output 600 [2021-11-21 01:25:57,527 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 01:25:57,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 594 treesize of output 675 [2021-11-21 01:25:57,603 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-21 01:25:57,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 675 treesize of output 658 [2021-11-21 01:25:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 655 treesize of output 642 [2021-11-21 01:25:57,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:25:57,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:25:57,893 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 01:25:57,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 636 treesize of output 652 [2021-11-21 01:25:57,979 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:25:57,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 628 [2021-11-21 01:26:08,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 01:26:08,502 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 01:26:08,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 01:26:08,528 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:26:08,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 146 [2021-11-21 01:26:08,558 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:26:08,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-21 01:26:08,586 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 01:26:08,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 01:26:08,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:26:08,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:08,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:26:08,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:08,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:08,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 01:26:08,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:08,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 01:26:09,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:26:09,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 01:26:10,465 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 25 for LOIs [2021-11-21 01:26:13,831 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 53 for LOIs [2021-11-21 01:26:14,212 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2021-11-21 01:26:14,322 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 01:26:19,642 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 01:26:19,686 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 01:26:19,798 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 01:26:20,261 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:26:31,316 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:26:31,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:31,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 7] total 35 [2021-11-21 01:26:31,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489087365] [2021-11-21 01:26:31,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:31,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-21 01:26:31,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:31,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-21 01:26:31,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=4573, Unknown=2, NotChecked=0, Total=4830 [2021-11-21 01:26:31,320 INFO L87 Difference]: Start difference. First operand 126 states and 156 transitions. Second operand has 35 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 states have internal predecessors, (87), 16 states have call successors, (38), 7 states have call predecessors, (38), 9 states have return successors, (34), 14 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-21 01:26:39,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:39,728 INFO L93 Difference]: Finished difference Result 282 states and 370 transitions. [2021-11-21 01:26:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-21 01:26:39,728 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 states have internal predecessors, (87), 16 states have call successors, (38), 7 states have call predecessors, (38), 9 states have return successors, (34), 14 states have call predecessors, (34), 16 states have call successors, (34) Word has length 71 [2021-11-21 01:26:39,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:39,730 INFO L225 Difference]: With dead ends: 282 [2021-11-21 01:26:39,730 INFO L226 Difference]: Without dead ends: 207 [2021-11-21 01:26:39,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 160 SyntacticMatches, 16 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2589 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=462, Invalid=8653, Unknown=5, NotChecked=0, Total=9120 [2021-11-21 01:26:39,734 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 69 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:39,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 1511 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 414 Invalid, 0 Unknown, 400 Unchecked, 0.5s Time] [2021-11-21 01:26:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-21 01:26:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 168. [2021-11-21 01:26:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 103 states have (on average 1.2135922330097086) internal successors, (125), 109 states have internal predecessors, (125), 41 states have call successors, (41), 22 states have call predecessors, (41), 23 states have return successors, (47), 36 states have call predecessors, (47), 40 states have call successors, (47) [2021-11-21 01:26:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 213 transitions. [2021-11-21 01:26:39,783 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 213 transitions. Word has length 71 [2021-11-21 01:26:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:39,784 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 213 transitions. [2021-11-21 01:26:39,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 32 states have internal predecessors, (87), 16 states have call successors, (38), 7 states have call predecessors, (38), 9 states have return successors, (34), 14 states have call predecessors, (34), 16 states have call successors, (34) [2021-11-21 01:26:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 213 transitions. [2021-11-21 01:26:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-21 01:26:39,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:39,786 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:39,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:40,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:26:40,008 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:26:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1769728643, now seen corresponding path program 1 times [2021-11-21 01:26:40,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:40,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358772887] [2021-11-21 01:26:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:40,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-21 01:26:41,127 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:41,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358772887] [2021-11-21 01:26:41,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358772887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:41,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490416768] [2021-11-21 01:26:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:41,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:41,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:41,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:41,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_660a12d5-6af9-4c33-a712-6dcdd48a91c1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:26:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:41,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-21 01:26:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:41,453 INFO L354 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2021-11-21 01:26:41,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 58 [2021-11-21 01:26:41,464 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 01:26:41,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-21 01:27:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 40 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:27:26,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:57,445 INFO L354 Elim1Store]: treesize reduction 274, result has 44.1 percent of original size [2021-11-21 01:27:57,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 4775 treesize of output 4506 [2021-11-21 01:27:57,811 INFO L354 Elim1Store]: treesize reduction 351, result has 30.9 percent of original size [2021-11-21 01:27:57,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 29 case distinctions, treesize of input 25141 treesize of output 23271 [2021-11-21 01:27:59,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:27:59,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19741 treesize of output 17635 [2021-11-21 01:27:59,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:27:59,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 17635 treesize of output 17623 [2021-11-21 01:28:00,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-21 01:28:00,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2021-11-21 01:28:00,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 01:28:06,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:28:06,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 01:28:07,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:28:07,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1493 treesize of output 1489 [2021-11-21 01:28:20,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2021-11-21 01:28:21,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 4 [2021-11-21 01:28:22,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:28:22,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 132 [2021-11-21 01:28:23,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:23,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-21 01:28:24,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:28:24,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 111 [2021-11-21 01:28:25,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:28:25,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-21 01:28:25,444 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-21 01:28:25,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-21 01:28:25,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:28:25,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 109 [2021-11-21 01:28:25,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:28:25,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 105 [2021-11-21 01:28:26,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-11-21 01:28:26,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-21 01:28:26,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:28:26,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 130 [2021-11-21 01:28:26,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:28:26,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 126 [2021-11-21 01:28:35,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 01:28:35,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 523 treesize of output 577