./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 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_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/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_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/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_ecd4c7e5-600e-472f-880b-bc4cab508ce1/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_ecd4c7e5-600e-472f-880b-bc4cab508ce1/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 b2aa49e297f60cfce052f243c4868c3f21a4b7a15679d0734b9f9fae5c35ea17 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:17:23,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:17:23,395 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:17:23,404 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:17:23,405 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:17:23,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:17:23,443 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:17:23,444 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:17:23,445 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:17:23,449 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:17:23,450 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:17:23,450 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:17:23,451 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:17:23,452 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:17:23,453 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:17:23,453 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:17:23,454 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:17:23,454 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:17:23,455 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:17:23,455 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:17:23,456 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:17:23,456 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:17:23,457 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:17:23,458 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:17:23,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:17:23,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:17:23,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:17:23,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:17:23,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:17:23,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:17:23,462 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:17:23,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:17:23,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:17:23,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:17:23,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:17:23,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:17:23,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:17:23,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:17:23,464 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:17:23,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:17:23,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:17:23,465 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:17:23,465 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:17:23,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:17:23,466 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_ecd4c7e5-600e-472f-880b-bc4cab508ce1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2aa49e297f60cfce052f243c4868c3f21a4b7a15679d0734b9f9fae5c35ea17 [2023-11-24 23:17:23,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:17:23,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:17:23,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:17:23,828 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:17:23,829 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:17:23,830 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i [2023-11-24 23:17:26,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:17:27,647 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:17:27,648 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i [2023-11-24 23:17:27,697 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/data/ba17e32f4/3e5c43421b964c88949155143ee62565/FLAG5b38fa5f1 [2023-11-24 23:17:27,716 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/data/ba17e32f4/3e5c43421b964c88949155143ee62565 [2023-11-24 23:17:27,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:17:27,723 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:17:27,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:17:27,727 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:17:27,733 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:17:27,733 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:17:27" (1/1) ... [2023-11-24 23:17:27,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439f25e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:27, skipping insertion in model container [2023-11-24 23:17:27,735 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:17:27" (1/1) ... [2023-11-24 23:17:27,909 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:17:28,274 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_ecd4c7e5-600e-472f-880b-bc4cab508ce1/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4493,4506] [2023-11-24 23:17:28,286 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_ecd4c7e5-600e-472f-880b-bc4cab508ce1/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4553,4566] [2023-11-24 23:17:29,720 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,721 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,722 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,723 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,724 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,739 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,740 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,742 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,743 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,745 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,746 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,747 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:29,748 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:30,371 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:17:30,373 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:17:30,374 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:17:30,375 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:17:30,377 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:17:30,378 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:17:30,379 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:17:30,380 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:17:30,381 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:17:30,381 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:17:31,156 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,157 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,180 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,181 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,188 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,188 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,204 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,205 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,206 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,206 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,207 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,207 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,208 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:17:31,304 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:17:31,329 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_ecd4c7e5-600e-472f-880b-bc4cab508ce1/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4493,4506] [2023-11-24 23:17:31,330 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_ecd4c7e5-600e-472f-880b-bc4cab508ce1/sv-benchmarks/c/aws-c-common/aws_hash_table_find_harness.i[4553,4566] [2023-11-24 23:17:31,377 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,377 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,378 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,378 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,379 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,386 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,386 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,387 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,388 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,389 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,390 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,390 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,391 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,425 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:17:31,426 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:17:31,427 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:17:31,428 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:17:31,429 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:17:31,429 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:17:31,430 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:17:31,431 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:17:31,431 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:17:31,432 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:17:31,472 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-11-24 23:17:31,630 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,631 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,640 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,641 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,646 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,646 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,662 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,663 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,663 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,664 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,665 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,665 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,666 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:17:31,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:17:32,088 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,088 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,089 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,089 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,089 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,089 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,089 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,091 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,091 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,091 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,092 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,092 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,092 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,092 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,092 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,093 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,093 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,093 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:17:32,102 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:17:32,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32 WrapperNode [2023-11-24 23:17:32,103 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:17:32,105 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:17:32,105 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:17:32,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:17:32,114 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,288 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,440 INFO L138 Inliner]: procedures = 772, calls = 2456, calls flagged for inlining = 69, calls inlined = 20, statements flattened = 860 [2023-11-24 23:17:32,442 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:17:32,443 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:17:32,443 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:17:32,443 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:17:32,453 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,538 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:17:32,569 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:17:32,570 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:17:32,570 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:17:32,571 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (1/1) ... [2023-11-24 23:17:32,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:17:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:32,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:17:32,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:17:32,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-24 23:17:32,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:17:32,651 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-24 23:17:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-24 23:17:32,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:17:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:17:32,651 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-24 23:17:32,652 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-24 23:17:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:17:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:17:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:17:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:17:32,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:17:32,653 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-24 23:17:32,653 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-24 23:17:32,654 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-24 23:17:32,654 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-24 23:17:32,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:17:32,654 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-24 23:17:32,654 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-24 23:17:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:17:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-24 23:17:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-24 23:17:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_find [2023-11-24 23:17:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_find [2023-11-24 23:17:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:17:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2023-11-24 23:17:32,656 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2023-11-24 23:17:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-24 23:17:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-24 23:17:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2023-11-24 23:17:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2023-11-24 23:17:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-11-24 23:17:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-11-24 23:17:32,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:17:32,658 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-24 23:17:32,658 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-24 23:17:32,658 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-11-24 23:17:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-11-24 23:17:32,659 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2023-11-24 23:17:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2023-11-24 23:17:32,659 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2023-11-24 23:17:32,659 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2023-11-24 23:17:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:17:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:17:32,660 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-24 23:17:32,660 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-24 23:17:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:17:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-24 23:17:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-24 23:17:32,661 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-24 23:17:32,661 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-24 23:17:32,662 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2023-11-24 23:17:32,662 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2023-11-24 23:17:32,663 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-24 23:17:32,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-24 23:17:32,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:17:33,113 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:17:33,116 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:17:33,250 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2023-11-24 23:17:33,296 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-11-24 23:17:33,550 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##8: assume !true; [2023-11-24 23:17:34,166 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:17:34,410 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:17:34,410 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-24 23:17:34,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:17:34 BoogieIcfgContainer [2023-11-24 23:17:34,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:17:34,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:17:34,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:17:34,418 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:17:34,418 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:17:27" (1/3) ... [2023-11-24 23:17:34,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305eded7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:17:34, skipping insertion in model container [2023-11-24 23:17:34,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:17:32" (2/3) ... [2023-11-24 23:17:34,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305eded7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:17:34, skipping insertion in model container [2023-11-24 23:17:34,420 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:17:34" (3/3) ... [2023-11-24 23:17:34,421 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_find_harness.i [2023-11-24 23:17:34,440 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:17:34,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:17:34,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:17:34,501 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;@4831f1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:17:34,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:17:34,507 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) [2023-11-24 23:17:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-24 23:17:34,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:34,525 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] [2023-11-24 23:17:34,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:17:34,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:34,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1254970145, now seen corresponding path program 1 times [2023-11-24 23:17:34,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:34,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827677355] [2023-11-24 23:17:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:34,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:34,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:17:34,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101494923] [2023-11-24 23:17:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:34,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:34,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:17:35,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:17:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:35,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 2591 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:17:35,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:17:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-11-24 23:17:35,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:17:35,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:35,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827677355] [2023-11-24 23:17:35,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:17:35,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101494923] [2023-11-24 23:17:35,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101494923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:17:35,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:17:35,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:17:35,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105051171] [2023-11-24 23:17:35,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:17:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:17:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:17:35,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:17:35,984 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 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-24 23:17:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:17:36,640 INFO L93 Difference]: Finished difference Result 396 states and 554 transitions. [2023-11-24 23:17:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:17:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) Word has length 131 [2023-11-24 23:17:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:17:36,662 INFO L225 Difference]: With dead ends: 396 [2023-11-24 23:17:36,663 INFO L226 Difference]: Without dead ends: 202 [2023-11-24 23:17:36,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:17:36,684 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:17:36,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 912 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:17:36,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-24 23:17:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-11-24 23:17:36,778 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), 22 states have call predecessors, (68), 23 states have return successors, (68), 68 states have call predecessors, (68), 67 states have call successors, (68) [2023-11-24 23:17:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 267 transitions. [2023-11-24 23:17:36,791 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 267 transitions. Word has length 131 [2023-11-24 23:17:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:17:36,793 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 267 transitions. [2023-11-24 23:17:36,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (28), 3 states have call predecessors, (28), 2 states have call successors, (28) [2023-11-24 23:17:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 267 transitions. [2023-11-24 23:17:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-24 23:17:36,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:17:36,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:17:36,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 23:17:37,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 23:17:37,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:17:37,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:17:37,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1927838927, now seen corresponding path program 1 times [2023-11-24 23:17:37,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:17:37,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533551420] [2023-11-24 23:17:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:37,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:17:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-11-24 23:17:39,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:17:39,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533551420] [2023-11-24 23:17:39,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533551420] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:17:39,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703154520] [2023-11-24 23:17:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:17:39,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:17:39,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:17:39,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:17:39,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:17:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:17:40,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 2589 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-24 23:17:40,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:17:40,905 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 [2023-11-24 23:17:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-24 23:17:41,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:17:41,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703154520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:17:41,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:17:41,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2023-11-24 23:17:41,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788378149] [2023-11-24 23:17:41,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:17:41,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:17:41,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:17:41,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:17:41,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:17:41,390 INFO L87 Difference]: Start difference. First operand 202 states and 267 transitions. Second operand has 9 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-11-24 23:17:44,461 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] [2023-11-24 23:17:46,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:17:48,613 WARN L539 Checker$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] [2023-11-24 23:17:51,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:17:53,439 WARN L539 Checker$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] [2023-11-24 23:17:55,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:17:58,007 WARN L539 Checker$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] [2023-11-24 23:18:00,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:18:02,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:18:04,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 23:18:06,125 WARN L539 Checker$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] [2023-11-24 23:18:08,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:18:10,252 WARN L539 Checker$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] [2023-11-24 23:18:12,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:18:14,464 WARN L539 Checker$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] [2023-11-24 23:18:16,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:18:18,602 WARN L539 Checker$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] [2023-11-24 23:18:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:18:18,836 INFO L93 Difference]: Finished difference Result 441 states and 571 transitions. [2023-11-24 23:18:18,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 23:18:18,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 139 [2023-11-24 23:18:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:18:18,842 INFO L225 Difference]: With dead ends: 441 [2023-11-24 23:18:18,843 INFO L226 Difference]: Without dead ends: 255 [2023-11-24 23:18:18,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-24 23:18:18,845 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 59 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 15 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:18:18,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1671 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 552 Invalid, 17 Unknown, 0 Unchecked, 37.2s Time] [2023-11-24 23:18:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-24 23:18:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2023-11-24 23:18:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 141 states have internal predecessors, (165), 79 states have call successors, (79), 33 states have call predecessors, (79), 34 states have return successors, (82), 79 states have call predecessors, (82), 78 states have call successors, (82) [2023-11-24 23:18:18,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 326 transitions. [2023-11-24 23:18:18,879 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 326 transitions. Word has length 139 [2023-11-24 23:18:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:18:18,880 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 326 transitions. [2023-11-24 23:18:18,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (33), 3 states have call predecessors, (33), 4 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-11-24 23:18:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 326 transitions. [2023-11-24 23:18:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-24 23:18:18,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:18:18,884 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 3, 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] [2023-11-24 23:18:18,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 23:18:19,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:18:19,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:18:19,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:18:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1833763220, now seen corresponding path program 1 times [2023-11-24 23:18:19,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:18:19,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725095211] [2023-11-24 23:18:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:19,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:18:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:19,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:18:19,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725095211] [2023-11-24 23:18:19,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-24 23:18:19,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949900381] [2023-11-24 23:18:19,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:18:19,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:18:19,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:18:19,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:18:19,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecd4c7e5-600e-472f-880b-bc4cab508ce1/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:18:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:18:20,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 2717 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-24 23:18:20,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:18:20,259 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 [2023-11-24 23:18:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-24 23:18:20,495 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:18:20,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949900381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:18:20,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:18:20,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-24 23:18:20,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771813613] [2023-11-24 23:18:20,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:18:20,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 23:18:20,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:18:20,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 23:18:20,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:18:20,500 INFO L87 Difference]: Start difference. First operand 254 states and 326 transitions. Second operand has 12 states, 9 states have (on average 7.555555555555555) internal successors, (68), 10 states have internal predecessors, (68), 5 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (32), 5 states have call predecessors, (32), 5 states have call successors, (32) [2023-11-24 23:18:24,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 23:18:27,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]