./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire --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 b2aa49e297f60cfce052f243c4868c3f21a4b7a15679d0734b9f9fae5c35ea17 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:38:09,817 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:38:09,941 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:38:09,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:38:09,949 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:38:09,989 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:38:09,990 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:38:09,991 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:38:09,992 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:38:09,997 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:38:09,998 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:38:09,998 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:38:09,998 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:38:10,000 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:38:10,002 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:38:10,002 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:38:10,002 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:38:10,003 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:38:10,003 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:38:10,004 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:38:10,004 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:38:10,005 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:38:10,006 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:38:10,007 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:38:10,007 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:38:10,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:38:10,008 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:38:10,008 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:38:10,009 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:38:10,009 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:38:10,011 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:38:10,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:38:10,011 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:38:10,012 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:38:10,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:10,012 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:38:10,012 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:38:10,013 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:38:10,013 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:38:10,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:38:10,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:38:10,014 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:38:10,014 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:38:10,014 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:38:10,015 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_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2aa49e297f60cfce052f243c4868c3f21a4b7a15679d0734b9f9fae5c35ea17 [2023-11-23 20:38:10,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:38:10,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:38:10,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:38:10,407 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:38:10,407 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:38:10,408 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i [2023-11-23 20:38:13,577 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:38:14,183 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:38:14,184 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i [2023-11-23 20:38:14,230 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/data/b4cc09914/6d73c8fccae049a78e72ef7300d7c44a/FLAG7d66e3195 [2023-11-23 20:38:14,251 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/data/b4cc09914/6d73c8fccae049a78e72ef7300d7c44a [2023-11-23 20:38:14,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:38:14,259 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:38:14,262 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:14,262 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:38:14,268 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:38:14,269 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,270 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213e0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:14, skipping insertion in model container [2023-11-23 20:38:14,270 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:14" (1/1) ... [2023-11-23 20:38:14,453 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:38:14,851 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_4886efb5-c50c-407c-b789-0825d5b57280/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4493,4506] [2023-11-23 20:38:14,861 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_4886efb5-c50c-407c-b789-0825d5b57280/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4553,4566] [2023-11-23 20:38:15,998 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:15,999 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,000 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,001 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,003 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,022 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,022 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,025 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,026 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,028 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,039 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,040 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,042 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:16,630 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:38:16,632 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:38:16,633 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:38:16,635 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:38:16,637 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:38:16,638 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:38:16,639 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:38:16,640 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:38:16,641 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:38:16,642 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:38:17,390 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,391 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,418 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,420 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,489 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,490 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,511 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,512 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,513 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,513 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,515 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,515 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:17,622 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:38:17,648 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_4886efb5-c50c-407c-b789-0825d5b57280/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4493,4506] [2023-11-23 20:38:17,649 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_4886efb5-c50c-407c-b789-0825d5b57280/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4553,4566] [2023-11-23 20:38:17,695 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,695 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,696 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,698 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,699 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,711 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,711 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,712 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,713 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,714 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,714 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,715 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,716 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,752 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:38:17,753 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:38:17,754 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:38:17,754 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:38:17,755 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:38:17,757 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:38:17,758 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:38:17,758 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:38:17,759 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:38:17,761 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:38:17,814 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-11-23 20:38:17,903 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,904 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,915 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,916 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,919 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,920 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,934 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,935 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,935 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,935 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,936 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,936 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,937 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:38:17,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:18,294 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,294 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,295 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,295 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,295 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,296 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,297 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,301 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,302 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,302 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,303 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,303 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,303 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,303 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,303 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,304 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,304 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,304 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:18,312 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:38:18,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18 WrapperNode [2023-11-23 20:38:18,314 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:18,315 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:18,316 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:38:18,317 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:38:18,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,501 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,615 INFO L138 Inliner]: procedures = 772, calls = 2456, calls flagged for inlining = 69, calls inlined = 20, statements flattened = 860 [2023-11-23 20:38:18,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:18,621 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:38:18,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:38:18,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:38:18,631 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,646 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,648 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,726 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,778 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:38:18,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:38:18,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:38:18,809 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:38:18,810 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (1/1) ... [2023-11-23 20:38:18,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:18,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:18,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:38:18,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:38:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-23 20:38:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:38:18,890 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 20:38:18,891 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 20:38:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:38:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:38:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-23 20:38:18,892 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-23 20:38:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:38:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:38:18,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:38:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:38:18,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:38:18,893 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 20:38:18,894 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 20:38:18,894 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 20:38:18,895 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 20:38:18,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:38:18,895 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-23 20:38:18,895 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-23 20:38:18,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:38:18,896 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 20:38:18,896 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 20:38:18,896 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_find [2023-11-23 20:38:18,896 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_find [2023-11-23 20:38:18,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:38:18,896 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2023-11-23 20:38:18,897 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2023-11-23 20:38:18,897 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-23 20:38:18,897 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-23 20:38:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2023-11-23 20:38:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2023-11-23 20:38:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-11-23 20:38:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-11-23 20:38:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:38:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-23 20:38:18,899 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-23 20:38:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-11-23 20:38:18,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-11-23 20:38:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2023-11-23 20:38:18,899 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2023-11-23 20:38:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2023-11-23 20:38:18,900 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2023-11-23 20:38:18,900 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:38:18,901 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:38:18,901 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-23 20:38:18,901 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-23 20:38:18,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:38:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 20:38:18,902 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 20:38:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-23 20:38:18,902 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-23 20:38:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2023-11-23 20:38:18,903 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2023-11-23 20:38:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 20:38:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 20:38:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:38:19,342 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:38:19,345 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:38:19,537 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2023-11-23 20:38:19,606 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-11-23 20:38:19,991 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2023-11-23 20:38:20,559 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:38:20,872 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:38:20,876 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-23 20:38:20,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:20 BoogieIcfgContainer [2023-11-23 20:38:20,878 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:38:20,881 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:38:20,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:38:20,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:38:20,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:14" (1/3) ... [2023-11-23 20:38:20,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8657b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:20, skipping insertion in model container [2023-11-23 20:38:20,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:18" (2/3) ... [2023-11-23 20:38:20,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8657b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:20, skipping insertion in model container [2023-11-23 20:38:20,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:20" (3/3) ... [2023-11-23 20:38:20,892 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_find_harness.i [2023-11-23 20:38:20,913 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:38:20,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:38:20,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:38:20,986 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;@42025fde, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:38:20,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:38:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 200 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 109 states have internal predecessors, (134), 68 states have call successors, (68), 22 states have call predecessors, (68), 22 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-11-23 20:38:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-23 20:38:21,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:21,013 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:21,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:21,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1254970145, now seen corresponding path program 1 times [2023-11-23 20:38:21,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:21,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435626170] [2023-11-23 20:38:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:21,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:21,507 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:38:21,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430693790] [2023-11-23 20:38:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:21,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:21,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:21,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:21,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:38:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:22,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 20:38:22,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-23 20:38:22,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:38:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2023-11-23 20:38:22,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435626170] [2023-11-23 20:38:22,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:38:22,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430693790] [2023-11-23 20:38:22,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430693790] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:22,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:22,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-11-23 20:38:22,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646041638] [2023-11-23 20:38:22,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:22,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:38:22,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:22,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:38:22,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:38:22,880 INFO L87 Difference]: Start difference. First operand has 200 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 109 states have internal predecessors, (134), 68 states have call successors, (68), 22 states have call predecessors, (68), 22 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-23 20:38:23,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:23,441 INFO L93 Difference]: Finished difference Result 320 states and 449 transitions. [2023-11-23 20:38:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:38:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 131 [2023-11-23 20:38:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:23,456 INFO L225 Difference]: With dead ends: 320 [2023-11-23 20:38:23,456 INFO L226 Difference]: Without dead ends: 202 [2023-11-23 20:38:23,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:38:23,465 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 6 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:23,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 896 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:38:23,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-23 20:38:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-11-23 20:38:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 110 states have (on average 1.190909090909091) internal successors, (131), 111 states have internal predecessors, (131), 68 states have call successors, (68), 23 states have call predecessors, (68), 23 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-23 20:38:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 266 transitions. [2023-11-23 20:38:23,530 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 266 transitions. Word has length 131 [2023-11-23 20:38:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:23,532 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 266 transitions. [2023-11-23 20:38:23,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-23 20:38:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 266 transitions. [2023-11-23 20:38:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-23 20:38:23,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:23,537 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:23,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:23,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 20:38:23,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:23,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:23,747 INFO L85 PathProgramCache]: Analyzing trace with hash 807382093, now seen corresponding path program 1 times [2023-11-23 20:38:23,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:23,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760584462] [2023-11-23 20:38:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:23,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:23,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:38:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1773487523] [2023-11-23 20:38:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:23,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:23,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:23,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:38:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:24,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:38:24,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-11-23 20:38:24,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:24,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:24,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760584462] [2023-11-23 20:38:24,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:38:24,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773487523] [2023-11-23 20:38:24,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773487523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:24,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:24,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:38:24,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16325423] [2023-11-23 20:38:24,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:24,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:38:24,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:24,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:38:24,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:24,749 INFO L87 Difference]: Start difference. First operand 202 states and 266 transitions. Second operand has 5 states, 4 states have (on average 14.25) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-23 20:38:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:25,269 INFO L93 Difference]: Finished difference Result 400 states and 526 transitions. [2023-11-23 20:38:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:38:25,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.25) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 140 [2023-11-23 20:38:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:25,274 INFO L225 Difference]: With dead ends: 400 [2023-11-23 20:38:25,274 INFO L226 Difference]: Without dead ends: 206 [2023-11-23 20:38:25,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:38:25,283 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:25,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 908 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:38:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-23 20:38:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-23 20:38:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 114 states have internal predecessors, (134), 68 states have call successors, (68), 23 states have call predecessors, (68), 24 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2023-11-23 20:38:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2023-11-23 20:38:25,329 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 140 [2023-11-23 20:38:25,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:25,330 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2023-11-23 20:38:25,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.25) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-23 20:38:25,330 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2023-11-23 20:38:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-23 20:38:25,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:25,335 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:25,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:25,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:25,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:25,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1969015389, now seen corresponding path program 1 times [2023-11-23 20:38:25,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:25,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418180589] [2023-11-23 20:38:25,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:25,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-11-23 20:38:28,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:28,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418180589] [2023-11-23 20:38:28,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418180589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:28,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087998550] [2023-11-23 20:38:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:28,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:28,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:28,135 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:28,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:38:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:28,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 2617 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-23 20:38:28,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:29,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 20:38:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-23 20:38:29,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:29,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087998550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:29,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:29,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2023-11-23 20:38:29,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268000921] [2023-11-23 20:38:29,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:29,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:38:29,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:29,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:38:29,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:38:29,533 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand has 9 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2023-11-23 20:38:32,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 20:38:34,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:36,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:38,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:40,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:42,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:45,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:47,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:49,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:51,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 20:38:53,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:55,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:57,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:38:59,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:39:01,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:39:03,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:39:05,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:39:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:05,925 INFO L93 Difference]: Finished difference Result 449 states and 577 transitions. [2023-11-23 20:39:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 20:39:05,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) Word has length 148 [2023-11-23 20:39:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:05,931 INFO L225 Difference]: With dead ends: 449 [2023-11-23 20:39:05,931 INFO L226 Difference]: Without dead ends: 259 [2023-11-23 20:39:05,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:39:05,933 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 66 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 16 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:05,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1505 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 527 Invalid, 17 Unknown, 0 Unchecked, 36.2s Time] [2023-11-23 20:39:05,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-23 20:39:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2023-11-23 20:39:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.1748251748251748) internal successors, (168), 144 states have internal predecessors, (168), 79 states have call successors, (79), 34 states have call predecessors, (79), 35 states have return successors, (82), 79 states have call predecessors, (82), 78 states have call successors, (82) [2023-11-23 20:39:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 329 transitions. [2023-11-23 20:39:05,972 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 329 transitions. Word has length 148 [2023-11-23 20:39:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:05,972 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 329 transitions. [2023-11-23 20:39:05,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (32), 4 states have call predecessors, (32), 4 states have call successors, (32) [2023-11-23 20:39:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 329 transitions. [2023-11-23 20:39:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-23 20:39:05,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:05,977 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:06,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:39:06,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:06,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:06,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:06,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1272826208, now seen corresponding path program 1 times [2023-11-23 20:39:06,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:06,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872009915] [2023-11-23 20:39:06,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:06,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:06,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:39:06,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872009915] [2023-11-23 20:39:06,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-23 20:39:06,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231616521] [2023-11-23 20:39:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:06,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:06,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:06,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:06,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:39:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:07,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 2745 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 20:39:07,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-23 20:39:07,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:39:07,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231616521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:39:07,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:39:07,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:39:07,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097577920] [2023-11-23 20:39:07,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:39:07,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:39:07,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:39:07,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:39:07,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:39:07,181 INFO L87 Difference]: Start difference. First operand 258 states and 329 transitions. Second operand has 8 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (37), 2 states have call predecessors, (37), 5 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2023-11-23 20:39:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:39:08,057 INFO L93 Difference]: Finished difference Result 459 states and 591 transitions. [2023-11-23 20:39:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:39:08,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (37), 2 states have call predecessors, (37), 5 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) Word has length 159 [2023-11-23 20:39:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:39:08,061 INFO L225 Difference]: With dead ends: 459 [2023-11-23 20:39:08,061 INFO L226 Difference]: Without dead ends: 264 [2023-11-23 20:39:08,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:39:08,063 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 1 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:39:08,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1446 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:39:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-11-23 20:39:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2023-11-23 20:39:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 143 states have (on average 1.167832167832168) internal successors, (167), 144 states have internal predecessors, (167), 79 states have call successors, (79), 34 states have call predecessors, (79), 35 states have return successors, (82), 79 states have call predecessors, (82), 78 states have call successors, (82) [2023-11-23 20:39:08,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 328 transitions. [2023-11-23 20:39:08,118 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 328 transitions. Word has length 159 [2023-11-23 20:39:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:39:08,119 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 328 transitions. [2023-11-23 20:39:08,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 14.6) internal successors, (73), 6 states have internal predecessors, (73), 3 states have call successors, (37), 2 states have call predecessors, (37), 5 states have return successors, (34), 4 states have call predecessors, (34), 3 states have call successors, (34) [2023-11-23 20:39:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 328 transitions. [2023-11-23 20:39:08,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 20:39:08,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:39:08,129 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:39:08,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:39:08,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:08,354 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:39:08,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:39:08,354 INFO L85 PathProgramCache]: Analyzing trace with hash -297717794, now seen corresponding path program 1 times [2023-11-23 20:39:08,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:39:08,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814699555] [2023-11-23 20:39:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:08,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:39:08,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:39:08,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880110245] [2023-11-23 20:39:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:39:08,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:39:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:39:08,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:39:08,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4886efb5-c50c-407c-b789-0825d5b57280/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:39:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:39:09,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 173 conjunts are in the unsatisfiable core [2023-11-23 20:39:09,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:39:09,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:39:09,746 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-23 20:39:09,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-23 20:39:09,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 20:39:09,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2023-11-23 20:39:10,363 INFO L349 Elim1Store]: treesize reduction 146, result has 31.5 percent of original size [2023-11-23 20:39:10,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 73 treesize of output 148