./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7 --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 f87ca444cebdd8343e0a486129ff23acad574c7cfb073abcacffd6c901ccf3af --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:40:24,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:40:24,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:40:24,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:40:24,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:40:24,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:40:24,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:40:24,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:40:24,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:40:24,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:40:24,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:40:24,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:40:24,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:40:24,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:40:24,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:40:24,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:40:24,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:40:24,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:40:24,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:40:24,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:40:24,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:40:24,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:40:24,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:40:24,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:40:24,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:40:24,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:40:24,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:40:24,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:40:24,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:40:24,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:40:24,487 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:40:24,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:40:24,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:40:24,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:40:24,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:40:24,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:40:24,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:40:24,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:40:24,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:40:24,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:40:24,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:40:24,501 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:40:24,557 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:40:24,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:40:24,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:40:24,559 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:40:24,560 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:40:24,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:40:24,561 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:40:24,562 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:40:24,562 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:40:24,563 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:40:24,564 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:40:24,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:40:24,565 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:40:24,566 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:40:24,566 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:40:24,566 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:40:24,567 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:40:24,567 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:40:24,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:40:24,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:40:24,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:40:24,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:40:24,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:40:24,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:40:24,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:40:24,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:40:24,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:40:24,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:40:24,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:40:24,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:40:24,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:40:24,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:40:24,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:40:24,577 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:40:24,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:40:24,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:40:24,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:40:24,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:40:24,579 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_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f87ca444cebdd8343e0a486129ff23acad574c7cfb073abcacffd6c901ccf3af [2021-11-25 20:40:24,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:40:24,943 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:40:24,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:40:24,951 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:40:24,952 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:40:24,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i [2021-11-25 20:40:25,063 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/data/d79651ce9/db88cd7d97134baab88a0eb7d27e0f2f/FLAG456e5a906 [2021-11-25 20:40:26,034 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:40:26,035 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i [2021-11-25 20:40:26,085 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/data/d79651ce9/db88cd7d97134baab88a0eb7d27e0f2f/FLAG456e5a906 [2021-11-25 20:40:26,443 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/data/d79651ce9/db88cd7d97134baab88a0eb7d27e0f2f [2021-11-25 20:40:26,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:40:26,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:40:26,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:40:26,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:40:26,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:40:26,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:40:26" (1/1) ... [2021-11-25 20:40:26,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd10674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:26, skipping insertion in model container [2021-11-25 20:40:26,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:40:26" (1/1) ... [2021-11-25 20:40:26,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:40:26,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:40:27,083 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_01a702e0-9535-424c-b4c9-0c60fc84ef8c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i[4498,4511] [2021-11-25 20:40:27,094 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_01a702e0-9535-424c-b4c9-0c60fc84ef8c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i[4558,4571] [2021-11-25 20:40:28,374 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:28,376 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:28,381 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:28,382 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:28,386 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:28,410 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:28,411 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:28,413 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:28,414 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:28,884 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 20:40:28,886 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 20:40:28,887 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 20:40:28,889 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 20:40:28,891 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 20:40:28,892 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 20:40:28,893 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 20:40:28,894 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 20:40:28,894 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 20:40:28,895 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 20:40:29,141 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 20:40:29,342 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,356 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:40:29,595 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:40:29,623 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_01a702e0-9535-424c-b4c9-0c60fc84ef8c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i[4498,4511] [2021-11-25 20:40:29,638 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_01a702e0-9535-424c-b4c9-0c60fc84ef8c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i[4558,4571] [2021-11-25 20:40:29,693 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,694 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,694 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,695 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,696 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,718 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,720 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,721 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:29,796 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 20:40:29,797 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 20:40:29,798 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 20:40:29,800 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 20:40:29,801 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 20:40:29,801 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 20:40:29,806 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 20:40:29,806 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 20:40:29,807 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 20:40:29,808 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 20:40:29,853 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 20:40:30,046 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:30,047 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:40:30,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:40:30,304 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:40:30,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30 WrapperNode [2021-11-25 20:40:30,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:40:30,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:40:30,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:40:30,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:40:30,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,596 INFO L137 Inliner]: procedures = 691, calls = 2629, calls flagged for inlining = 63, calls inlined = 9, statements flattened = 863 [2021-11-25 20:40:30,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:40:30,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:40:30,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:40:30,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:40:30,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:40:30,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:40:30,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:40:30,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:40:30,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (1/1) ... [2021-11-25 20:40:30,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:40:30,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:40:30,801 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:40:30,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:40:30,854 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2021-11-25 20:40:30,855 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2021-11-25 20:40:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-25 20:40:30,855 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-25 20:40:30,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:40:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 20:40:30,856 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 20:40:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:40:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:40:30,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:40:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:40:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:40:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-25 20:40:30,857 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-25 20:40:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:40:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:40:30,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:40:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 20:40:30,858 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 20:40:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-25 20:40:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-25 20:40:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:40:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:40:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:40:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:40:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:40:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 20:40:30,860 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 20:40:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:40:30,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:40:31,171 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:40:31,174 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:40:32,799 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:40:33,036 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:40:33,037 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:40:33,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:40:33 BoogieIcfgContainer [2021-11-25 20:40:33,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:40:33,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:40:33,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:40:33,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:40:33,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:40:26" (1/3) ... [2021-11-25 20:40:33,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6576ebfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:40:33, skipping insertion in model container [2021-11-25 20:40:33,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:40:30" (2/3) ... [2021-11-25 20:40:33,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6576ebfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:40:33, skipping insertion in model container [2021-11-25 20:40:33,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:40:33" (3/3) ... [2021-11-25 20:40:33,051 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_eq_c_str_harness.i [2021-11-25 20:40:33,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:40:33,061 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:40:33,129 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:40:33,146 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 [2021-11-25 20:40:33,150 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:40:33,179 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-25 20:40:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 20:40:33,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:33,194 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:33,194 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:40:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash -391814898, now seen corresponding path program 1 times [2021-11-25 20:40:33,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:33,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859130531] [2021-11-25 20:40:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:33,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-25 20:40:35,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:35,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859130531] [2021-11-25 20:40:35,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859130531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:35,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:40:35,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-25 20:40:35,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419797746] [2021-11-25 20:40:35,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:35,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:40:35,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:40:35,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:40:35,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:40:35,385 INFO L87 Difference]: Start difference. First operand has 94 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 13 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-25 20:40:37,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:37,899 INFO L93 Difference]: Finished difference Result 174 states and 251 transitions. [2021-11-25 20:40:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:40:37,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 79 [2021-11-25 20:40:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:37,927 INFO L225 Difference]: With dead ends: 174 [2021-11-25 20:40:37,928 INFO L226 Difference]: Without dead ends: 128 [2021-11-25 20:40:37,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-11-25 20:40:37,946 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 107 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:37,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 971 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 20:40:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-25 20:40:38,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-11-25 20:40:38,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 59 states have internal predecessors, (69), 33 states have call successors, (33), 10 states have call predecessors, (33), 11 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2021-11-25 20:40:38,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2021-11-25 20:40:38,056 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 79 [2021-11-25 20:40:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:38,059 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2021-11-25 20:40:38,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-11-25 20:40:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2021-11-25 20:40:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-25 20:40:38,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:38,068 INFO L514 BasicCegarLoop]: trace histogram [9, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:40:38,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:40:38,069 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:40:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:38,071 INFO L85 PathProgramCache]: Analyzing trace with hash -171307204, now seen corresponding path program 1 times [2021-11-25 20:40:38,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:38,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592471566] [2021-11-25 20:40:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:38,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-25 20:40:40,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:40,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592471566] [2021-11-25 20:40:40,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592471566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:40,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551674205] [2021-11-25 20:40:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:40,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:40,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:40:40,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:40:40,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a702e0-9535-424c-b4c9-0c60fc84ef8c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:40:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:41,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-25 20:40:41,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:41,721 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 6 treesize of output 5 [2021-11-25 20:40:41,734 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 6 treesize of output 5 [2021-11-25 20:40:44,238 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 40 treesize of output 28 [2021-11-25 20:40:44,247 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 34 treesize of output 22 [2021-11-25 20:40:45,870 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 17 treesize of output 9 [2021-11-25 20:40:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:40:46,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:40:50,250 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2021-11-25 20:41:18,706 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.