./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --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 99ee682e10e695b9eb1615836043680c46e24c4df6227faaade6163d2feea99e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:55:09,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:55:09,470 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:55:09,477 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:55:09,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:55:09,503 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:55:09,504 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:55:09,505 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:55:09,506 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:55:09,507 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:55:09,507 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:55:09,508 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:55:09,509 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:55:09,510 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:55:09,510 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:55:09,511 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:55:09,512 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:55:09,512 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:55:09,513 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:55:09,514 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:55:09,514 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:55:09,515 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:55:09,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:55:09,517 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:55:09,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:55:09,518 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:55:09,518 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:55:09,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:55:09,520 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:55:09,520 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:55:09,521 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:55:09,521 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:55:09,522 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:55:09,522 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:55:09,523 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:09,524 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:55:09,524 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:55:09,525 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:55:09,525 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:55:09,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:55:09,526 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:55:09,527 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:55:09,528 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:55:09,528 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:55:09,529 INFO L153 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_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99ee682e10e695b9eb1615836043680c46e24c4df6227faaade6163d2feea99e [2023-11-24 23:55:09,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:55:09,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:55:09,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:55:09,887 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:55:09,887 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:55:09,889 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i [2023-11-24 23:55:12,973 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:55:13,621 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:55:13,622 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i [2023-11-24 23:55:13,668 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/data/5fb58a594/e2f083ce8aac4152a2bae47ed0dab3d9/FLAG2d256bf60 [2023-11-24 23:55:13,686 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/data/5fb58a594/e2f083ce8aac4152a2bae47ed0dab3d9 [2023-11-24 23:55:13,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:55:13,697 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:55:13,699 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:13,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:55:13,705 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:55:13,706 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:13" (1/1) ... [2023-11-24 23:55:13,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30dc523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:13, skipping insertion in model container [2023-11-24 23:55:13,708 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:55:13" (1/1) ... [2023-11-24 23:55:13,861 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:55:14,184 WARN L240 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_0f48a874-b9a8-454c-937e-909507db21e3/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i[4492,4505] [2023-11-24 23:55:14,195 WARN L240 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_0f48a874-b9a8-454c-937e-909507db21e3/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i[4552,4565] [2023-11-24 23:55:15,533 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:15,535 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:15,537 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:15,539 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:15,544 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:15,573 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:15,574 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:15,589 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:15,590 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,191 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:55:16,193 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:55:16,194 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:55:16,197 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:55:16,203 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:55:16,204 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:55:16,205 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:55:16,209 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:55:16,210 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:55:16,212 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:55:16,560 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,560 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:16,771 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:55:16,797 WARN L240 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_0f48a874-b9a8-454c-937e-909507db21e3/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i[4492,4505] [2023-11-24 23:55:16,798 WARN L240 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_0f48a874-b9a8-454c-937e-909507db21e3/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness.i[4552,4565] [2023-11-24 23:55:16,859 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,860 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,860 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,861 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,862 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,883 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,884 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,886 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,886 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:16,946 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:55:16,947 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:55:16,948 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:55:16,949 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:55:16,951 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:55:16,952 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:55:16,952 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:55:16,953 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:55:16,954 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:55:16,954 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:55:17,081 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8277] [2023-11-24 23:55:17,083 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:17,083 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:55:17,140 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8763-8774] [2023-11-24 23:55:17,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:55:17,392 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,392 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,393 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,393 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,393 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,393 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,393 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,393 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,394 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,394 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,394 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,394 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,394 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,394 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,395 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,395 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,395 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,395 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:55:17,403 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:55:17,404 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17 WrapperNode [2023-11-24 23:55:17,404 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:55:17,405 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:17,406 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:55:17,406 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:55:17,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,623 INFO L138 Inliner]: procedures = 690, calls = 2618, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 803 [2023-11-24 23:55:17,624 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:55:17,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:55:17,625 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:55:17,625 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:55:17,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,651 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,713 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,717 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,741 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,757 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,771 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:55:17,778 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:55:17,779 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:55:17,779 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:55:17,780 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (1/1) ... [2023-11-24 23:55:17,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:55:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:17,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:55:17,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:55:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2023-11-24 23:55:17,887 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2023-11-24 23:55:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:55:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-24 23:55:17,888 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-24 23:55:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:55:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:55:17,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:55:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:55:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:55:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-11-24 23:55:17,889 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-11-24 23:55:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:55:17,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:55:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-24 23:55:17,890 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-24 23:55:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-24 23:55:17,890 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-24 23:55:17,891 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-24 23:55:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-24 23:55:17,891 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:55:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:55:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:55:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:55:17,892 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-24 23:55:17,893 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-24 23:55:17,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:55:17,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:55:18,207 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:55:18,210 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:55:19,495 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:55:19,682 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:55:19,682 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 23:55:19,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:19 BoogieIcfgContainer [2023-11-24 23:55:19,685 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:55:19,687 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:55:19,687 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:55:19,691 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:55:19,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:55:13" (1/3) ... [2023-11-24 23:55:19,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a8907a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:19, skipping insertion in model container [2023-11-24 23:55:19,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:55:17" (2/3) ... [2023-11-24 23:55:19,694 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a8907a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:55:19, skipping insertion in model container [2023-11-24 23:55:19,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:55:19" (3/3) ... [2023-11-24 23:55:19,698 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_eq_c_str_harness.i [2023-11-24 23:55:19,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:55:19,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:55:19,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:55:19,798 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7eaf0a68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:55:19,799 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:55:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 48 states have internal predecessors, (59), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-24 23:55:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-24 23:55:19,813 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:19,814 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:19,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:55:19,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1390205959, now seen corresponding path program 1 times [2023-11-24 23:55:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:19,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083418056] [2023-11-24 23:55:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-24 23:55:22,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083418056] [2023-11-24 23:55:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083418056] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946358475] [2023-11-24 23:55:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:22,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:22,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:22,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:55:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:22,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 2437 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 23:55:22,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:55:22,931 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:55:22,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946358475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:55:22,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:55:22,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-11-24 23:55:22,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320449144] [2023-11-24 23:55:22,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:55:22,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:55:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:55:22,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:55:22,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:55:22,976 INFO L87 Difference]: Start difference. First operand has 82 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 48 states have internal predecessors, (59), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 23:55:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:55:23,227 INFO L93 Difference]: Finished difference Result 132 states and 186 transitions. [2023-11-24 23:55:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:55:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 52 [2023-11-24 23:55:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:55:23,240 INFO L225 Difference]: With dead ends: 132 [2023-11-24 23:55:23,240 INFO L226 Difference]: Without dead ends: 80 [2023-11-24 23:55:23,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:55:23,247 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:55:23,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 336 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:55:23,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-24 23:55:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-24 23:55:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-24 23:55:23,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2023-11-24 23:55:23,299 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 52 [2023-11-24 23:55:23,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:55:23,301 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2023-11-24 23:55:23,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 23:55:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2023-11-24 23:55:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-24 23:55:23,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:55:23,307 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:55:23,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:55:23,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 23:55:23,518 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:55:23,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:55:23,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1462996124, now seen corresponding path program 1 times [2023-11-24 23:55:23,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:55:23,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430756877] [2023-11-24 23:55:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:23,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:55:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-24 23:55:27,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:55:27,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430756877] [2023-11-24 23:55:27,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430756877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:55:27,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079213530] [2023-11-24 23:55:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:55:27,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:55:27,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:55:27,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:55:27,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f48a874-b9a8-454c-937e-909507db21e3/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:55:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:55:27,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-24 23:55:27,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:55:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-24 23:55:29,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:55:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-24 23:55:31,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079213530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:55:31,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1933942050] [2023-11-24 23:55:31,319 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2023-11-24 23:55:31,319 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:55:31,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:55:31,330 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:55:31,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs