./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_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_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/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_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/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_44e4e6d2-50be-457c-9818-1d18ad73d3cd/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 e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:55:32,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:55:32,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:55:32,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:55:32,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:55:32,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:55:32,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:55:32,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:55:32,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:55:32,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:55:32,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:55:32,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:55:32,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:55:32,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:55:32,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:55:32,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:55:32,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:55:32,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:55:32,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:55:32,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:55:32,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:55:32,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:55:32,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:55:32,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:55:32,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:55:32,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:55:32,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:55:32,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:55:32,472 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:55:32,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:55:32,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:55:32,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:55:32,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:55:32,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:55:32,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:55:32,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:55:32,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:55:32,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:55:32,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:55:32,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:55:32,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:55:32,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:55:32,535 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:55:32,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:55:32,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:55:32,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:55:32,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:55:32,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:55:32,546 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:55:32,546 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:55:32,546 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:55:32,546 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:55:32,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:55:32,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:55:32,548 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:55:32,548 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:55:32,549 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:55:32,549 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:55:32,549 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:55:32,550 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:55:32,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:55:32,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:55:32,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:55:32,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:55:32,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:55:32,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:55:32,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:55:32,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:55:32,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:55:32,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:55:32,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:55:32,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:55:32,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:55:32,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:55:32,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:55:32,556 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:55:32,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:55:32,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:55:32,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:55:32,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:55:32,557 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_44e4e6d2-50be-457c-9818-1d18ad73d3cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 [2021-11-21 00:55:32,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:55:32,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:55:32,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:55:32,891 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:55:32,891 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:55:32,893 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-21 00:55:33,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/data/f3177457f/02e974afd02a43ac93c120c03cab9d2d/FLAGc9f1f1b5b [2021-11-21 00:55:34,073 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:55:34,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-21 00:55:34,128 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/data/f3177457f/02e974afd02a43ac93c120c03cab9d2d/FLAGc9f1f1b5b [2021-11-21 00:55:34,483 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/data/f3177457f/02e974afd02a43ac93c120c03cab9d2d [2021-11-21 00:55:34,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:55:34,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:55:34,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:55:34,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:55:34,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:55:34,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:55:34" (1/1) ... [2021-11-21 00:55:34,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aefa1b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:34, skipping insertion in model container [2021-11-21 00:55:34,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:55:34" (1/1) ... [2021-11-21 00:55:34,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:55:34,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:55:35,050 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_44e4e6d2-50be-457c-9818-1d18ad73d3cd/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-21 00:55:35,061 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_44e4e6d2-50be-457c-9818-1d18ad73d3cd/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-21 00:55:36,240 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:36,241 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:36,242 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:36,243 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:36,245 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:36,263 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:36,265 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:36,267 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:36,268 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:36,825 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:55:36,827 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:55:36,829 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:55:36,830 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:55:36,832 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:55:36,834 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:55:36,835 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:55:36,836 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:55:36,837 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:55:36,838 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:55:37,053 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:55:37,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,172 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:55:37,437 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:55:37,453 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-21 00:55:37,454 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-21 00:55:37,506 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,506 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,507 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,507 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,508 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,517 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,518 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,520 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,520 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,564 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:55:37,566 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:55:37,567 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:55:37,568 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:55:37,569 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:55:37,578 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:55:37,578 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:55:37,579 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:55:37,580 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:55:37,580 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:55:37,606 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:55:37,668 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,669 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:55:37,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:55:38,003 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:55:38,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38 WrapperNode [2021-11-21 00:55:38,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:55:38,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:55:38,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:55:38,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:55:38,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,253 INFO L137 Inliner]: procedures = 691, calls = 2504, calls flagged for inlining = 56, calls inlined = 8, statements flattened = 817 [2021-11-21 00:55:38,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:55:38,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:55:38,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:55:38,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:55:38,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:55:38,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:55:38,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:55:38,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:55:38,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (1/1) ... [2021-11-21 00:55:38,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:55:38,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:38,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:55:38,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:55:38,494 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-21 00:55:38,495 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-21 00:55:38,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:55:38,496 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 00:55:38,497 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 00:55:38,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:55:38,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:55:38,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:55:38,499 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-11-21 00:55:38,499 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-11-21 00:55:38,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:55:38,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:55:38,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:55:38,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:55:38,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:55:38,501 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 00:55:38,502 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 00:55:38,502 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-21 00:55:38,502 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-21 00:55:38,502 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:55:38,503 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:55:38,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:55:38,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:55:38,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:55:38,504 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 00:55:38,504 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 00:55:38,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:55:38,505 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-21 00:55:38,505 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-21 00:55:38,505 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-21 00:55:38,505 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-21 00:55:38,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:55:38,901 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:55:38,904 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:55:40,793 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:55:41,134 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:55:41,135 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:55:41,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:55:41 BoogieIcfgContainer [2021-11-21 00:55:41,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:55:41,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:55:41,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:55:41,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:55:41,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:55:34" (1/3) ... [2021-11-21 00:55:41,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b602f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:55:41, skipping insertion in model container [2021-11-21 00:55:41,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:55:38" (2/3) ... [2021-11-21 00:55:41,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b602f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:55:41, skipping insertion in model container [2021-11-21 00:55:41,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:55:41" (3/3) ... [2021-11-21 00:55:41,150 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_clean_up_secure_harness.i [2021-11-21 00:55:41,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:55:41,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:55:41,235 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:55:41,253 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:55:41,253 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:55:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-21 00:55:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-21 00:55:41,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:41,295 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:55:41,296 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:41,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:41,302 INFO L85 PathProgramCache]: Analyzing trace with hash 591884185, now seen corresponding path program 1 times [2021-11-21 00:55:41,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:41,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102742022] [2021-11-21 00:55:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:41,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:55:44,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:44,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102742022] [2021-11-21 00:55:44,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102742022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:55:44,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:55:44,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-21 00:55:44,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702905875] [2021-11-21 00:55:44,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:55:44,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:55:44,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:55:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:55:44,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:55:44,614 INFO L87 Difference]: Start difference. First operand has 83 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-21 00:55:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:55:46,874 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2021-11-21 00:55:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:55:46,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 50 [2021-11-21 00:55:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:55:46,893 INFO L225 Difference]: With dead ends: 124 [2021-11-21 00:55:46,893 INFO L226 Difference]: Without dead ends: 81 [2021-11-21 00:55:46,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:55:46,913 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 36 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:55:46,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 467 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-21 00:55:46,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-21 00:55:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-21 00:55:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:55:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2021-11-21 00:55:46,982 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 50 [2021-11-21 00:55:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:55:46,984 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2021-11-21 00:55:46,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-21 00:55:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2021-11-21 00:55:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 00:55:46,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:55:46,989 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:55:46,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:55:46,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:55:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:55:46,997 INFO L85 PathProgramCache]: Analyzing trace with hash -746103450, now seen corresponding path program 1 times [2021-11-21 00:55:46,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:55:46,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985583816] [2021-11-21 00:55:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:46,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:55:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 00:55:49,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:55:49,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985583816] [2021-11-21 00:55:49,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985583816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:55:49,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313200756] [2021-11-21 00:55:49,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:55:49,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:55:49,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:55:49,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:55:49,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44e4e6d2-50be-457c-9818-1d18ad73d3cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:55:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:55:50,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 2536 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-21 00:55:50,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:55:50,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:55:55,668 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 80 treesize of output 68 [2021-11-21 00:55:55,748 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:55:55,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-21 00:55:56,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:55:56,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:55:56,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2021-11-21 00:55:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:55:56,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:55:56,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 23 [2021-11-21 00:55:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:55:56,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:56:00,545 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2021-11-21 01:05:09,195 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.