./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.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_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/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_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/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_bcb63d4a-f64b-45f8-a153-800cdd018b4f/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 f4f0a7d90baaf3c6f383556a6db0dccf9ba6f55d8bb50a635d310d7c96d51ae8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:02,168 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:02,242 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:08:02,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:02,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:02,272 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:02,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:02,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:02,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:02,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:02,275 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:02,276 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:02,276 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:02,277 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:08:02,277 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:02,278 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:02,279 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:08:02,279 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:08:02,279 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:02,280 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:08:02,281 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:08:02,282 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:08:02,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:02,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:08:02,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:02,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:02,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:08:02,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:02,285 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:08:02,286 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:08:02,286 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:02,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:02,287 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:02,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:02,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:02,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:02,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:02,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:08:02,290 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:08:02,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:08:02,290 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:02,291 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:08:02,291 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:02,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:02,292 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_bcb63d4a-f64b-45f8-a153-800cdd018b4f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4f0a7d90baaf3c6f383556a6db0dccf9ba6f55d8bb50a635d310d7c96d51ae8 [2023-11-23 21:08:02,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:02,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:02,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:02,591 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:02,591 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:02,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i [2023-11-23 21:08:05,748 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:06,471 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:06,473 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i [2023-11-23 21:08:06,528 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/data/cfb64ccd1/60b1720cdc7c4f66b340db190efcb449/FLAGeaed6108d [2023-11-23 21:08:06,546 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/data/cfb64ccd1/60b1720cdc7c4f66b340db190efcb449 [2023-11-23 21:08:06,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:06,556 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:06,559 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:06,559 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:06,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:06,566 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:06" (1/1) ... [2023-11-23 21:08:06,567 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7a19bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:06, skipping insertion in model container [2023-11-23 21:08:06,567 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:06" (1/1) ... [2023-11-23 21:08:06,731 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:07,124 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_bcb63d4a-f64b-45f8-a153-800cdd018b4f/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i[4494,4507] [2023-11-23 21:08:07,135 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_bcb63d4a-f64b-45f8-a153-800cdd018b4f/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i[4554,4567] [2023-11-23 21:08:08,572 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,573 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,574 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,575 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,576 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,595 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,596 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,598 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,599 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,602 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,604 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,605 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:08,606 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:09,330 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:08:09,332 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:08:09,335 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:08:09,337 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:08:09,339 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:08:09,340 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:08:09,341 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:08:09,342 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:08:09,359 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:08:09,360 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:08:10,076 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,077 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,101 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,102 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,109 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,110 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,124 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,125 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,126 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,126 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,127 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,127 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,128 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:10,201 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:08:10,227 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_bcb63d4a-f64b-45f8-a153-800cdd018b4f/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i[4494,4507] [2023-11-23 21:08:10,228 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_bcb63d4a-f64b-45f8-a153-800cdd018b4f/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i[4554,4567] [2023-11-23 21:08:10,284 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,286 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,288 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,288 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,290 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,302 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,304 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,305 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,306 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,307 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,308 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,309 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,309 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,350 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:08:10,351 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:08:10,353 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:08:10,354 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:08:10,355 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:08:10,356 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:08:10,357 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:08:10,358 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:08:10,359 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:08:10,360 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:08:10,423 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7553-7564] [2023-11-23 21:08:10,587 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,587 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,597 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,598 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,601 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,602 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,617 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,618 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,618 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,619 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,620 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,620 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,621 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:08:10,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:11,016 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,017 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,017 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,017 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,017 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,017 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,018 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,018 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,018 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,018 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,018 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,019 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,019 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,020 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,020 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,020 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,020 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,020 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:08:11,029 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:08:11,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11 WrapperNode [2023-11-23 21:08:11,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:11,032 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:11,033 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:08:11,033 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:08:11,043 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,185 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,260 INFO L138 Inliner]: procedures = 773, calls = 2441, calls flagged for inlining = 68, calls inlined = 13, statements flattened = 611 [2023-11-23 21:08:11,260 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:11,261 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:08:11,261 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:08:11,262 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:08:11,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,294 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,294 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,333 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,338 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,346 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,352 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,375 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:08:11,376 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:08:11,376 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:08:11,376 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:08:11,377 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:11,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:11,420 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:08:11,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:08:11,465 INFO L130 BoogieDeclarations]: Found specification of procedure memset_override_0_impl [2023-11-23 21:08:11,465 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_override_0_impl [2023-11-23 21:08:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-23 21:08:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 21:08:11,466 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 21:08:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:08:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 21:08:11,467 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 21:08:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:08:11,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:08:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-23 21:08:11,468 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-23 21:08:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_clear [2023-11-23 21:08:11,468 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_clear [2023-11-23 21:08:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:08:11,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:08:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:08:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:08:11,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:08:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 21:08:11,471 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 21:08:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 21:08:11,471 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 21:08:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:08:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-23 21:08:11,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-23 21:08:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:08:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 21:08:11,472 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 21:08:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:08:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-23 21:08:11,473 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-23 21:08:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-23 21:08:11,473 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-23 21:08:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:08:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-23 21:08:11,474 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-23 21:08:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:08:11,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:08:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:08:11,474 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:08:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-23 21:08:11,475 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-23 21:08:11,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:08:11,476 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 21:08:11,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 21:08:11,476 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-23 21:08:11,476 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-23 21:08:11,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:08:11,900 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:08:11,903 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:08:12,906 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:08:13,116 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:08:13,117 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:08:13,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:13 BoogieIcfgContainer [2023-11-23 21:08:13,124 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:08:13,128 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:08:13,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:08:13,132 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:08:13,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:06" (1/3) ... [2023-11-23 21:08:13,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f44a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:13, skipping insertion in model container [2023-11-23 21:08:13,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11" (2/3) ... [2023-11-23 21:08:13,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f44a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:13, skipping insertion in model container [2023-11-23 21:08:13,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:13" (3/3) ... [2023-11-23 21:08:13,145 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_clear_harness_negated.i [2023-11-23 21:08:13,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:08:13,166 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:08:13,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:08:13,248 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;@71083daf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:08:13,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:08:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-23 21:08:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 21:08:13,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:13,270 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-23 21:08:13,270 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:13,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash 383046994, now seen corresponding path program 1 times [2023-11-23 21:08:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:13,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054615200] [2023-11-23 21:08:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:13,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:13,769 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:08:13,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624287317] [2023-11-23 21:08:13,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:13,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:13,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:13,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:13,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:08:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:14,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:08:14,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 21:08:14,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:14,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:14,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054615200] [2023-11-23 21:08:14,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:08:14,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624287317] [2023-11-23 21:08:14,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624287317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:14,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:14,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:08:14,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747378663] [2023-11-23 21:08:14,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:14,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:14,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:14,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:14,607 INFO L87 Difference]: Start difference. First operand has 137 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:08:15,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:15,107 INFO L93 Difference]: Finished difference Result 244 states and 317 transitions. [2023-11-23 21:08:15,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:08:15,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 99 [2023-11-23 21:08:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:15,127 INFO L225 Difference]: With dead ends: 244 [2023-11-23 21:08:15,128 INFO L226 Difference]: Without dead ends: 138 [2023-11-23 21:08:15,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 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 21:08:15,138 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:15,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 576 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:08:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-23 21:08:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-11-23 21:08:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 77 states have (on average 1.155844155844156) internal successors, (89), 78 states have internal predecessors, (89), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) [2023-11-23 21:08:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 171 transitions. [2023-11-23 21:08:15,232 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 171 transitions. Word has length 99 [2023-11-23 21:08:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:15,234 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 171 transitions. [2023-11-23 21:08:15,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:08:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 171 transitions. [2023-11-23 21:08:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 21:08:15,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:15,240 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-23 21:08:15,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:15,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:08:15,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:15,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:15,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1077975905, now seen corresponding path program 1 times [2023-11-23 21:08:15,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:15,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866226307] [2023-11-23 21:08:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:15,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-23 21:08:18,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:18,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866226307] [2023-11-23 21:08:18,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866226307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:18,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718003556] [2023-11-23 21:08:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:18,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:18,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:18,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:18,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:08:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:18,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-23 21:08:18,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:19,153 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 21:08:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 21:08:19,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:19,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718003556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:19,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:08:19,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2023-11-23 21:08:19,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421809415] [2023-11-23 21:08:19,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:19,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:08:19,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:19,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:08:19,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:08:19,730 INFO L87 Difference]: Start difference. First operand 138 states and 171 transitions. Second operand has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 21:08:22,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-23 21:08:25,034 WARN L539 Checker$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 21:08:27,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:08:29,157 WARN L539 Checker$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 21:08:31,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:08:33,342 WARN L539 Checker$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 21:08:35,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:08:37,719 WARN L539 Checker$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 21:08:39,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:08:41,862 WARN L539 Checker$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 21:08:43,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:08:46,019 WARN L539 Checker$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 21:08:46,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:46,068 INFO L93 Difference]: Finished difference Result 272 states and 329 transitions. [2023-11-23 21:08:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:08:46,069 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 103 [2023-11-23 21:08:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:46,074 INFO L225 Difference]: With dead ends: 272 [2023-11-23 21:08:46,074 INFO L226 Difference]: Without dead ends: 182 [2023-11-23 21:08:46,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 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 21:08:46,084 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 59 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 12 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:46,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 878 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 402 Invalid, 12 Unknown, 0 Unchecked, 26.1s Time] [2023-11-23 21:08:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-23 21:08:46,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2023-11-23 21:08:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 103 states have internal predecessors, (115), 49 states have call successors, (49), 28 states have call predecessors, (49), 30 states have return successors, (51), 49 states have call predecessors, (51), 48 states have call successors, (51) [2023-11-23 21:08:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2023-11-23 21:08:46,149 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 103 [2023-11-23 21:08:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:46,152 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2023-11-23 21:08:46,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 21:08:46,153 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2023-11-23 21:08:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-23 21:08:46,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:46,160 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-23 21:08:46,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:46,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 21:08:46,375 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:46,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1352041537, now seen corresponding path program 1 times [2023-11-23 21:08:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:46,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169297705] [2023-11-23 21:08:46,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:46,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-23 21:08:48,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:48,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169297705] [2023-11-23 21:08:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169297705] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766132817] [2023-11-23 21:08:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:48,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:48,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:48,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:48,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:08:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:48,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 21:08:48,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 21:08:48,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766132817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:48,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:08:48,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2023-11-23 21:08:48,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846327557] [2023-11-23 21:08:48,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:48,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:08:48,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:08:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2023-11-23 21:08:48,780 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 8 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:08:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:49,500 INFO L93 Difference]: Finished difference Result 282 states and 339 transitions. [2023-11-23 21:08:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:08:49,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) Word has length 109 [2023-11-23 21:08:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:49,505 INFO L225 Difference]: With dead ends: 282 [2023-11-23 21:08:49,505 INFO L226 Difference]: Without dead ends: 187 [2023-11-23 21:08:49,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:08:49,507 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:49,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 908 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:08:49,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-23 21:08:49,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 181. [2023-11-23 21:08:49,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 103 states have internal predecessors, (114), 49 states have call successors, (49), 28 states have call predecessors, (49), 30 states have return successors, (51), 49 states have call predecessors, (51), 48 states have call successors, (51) [2023-11-23 21:08:49,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 214 transitions. [2023-11-23 21:08:49,534 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 214 transitions. Word has length 109 [2023-11-23 21:08:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:49,535 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 214 transitions. [2023-11-23 21:08:49,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 10.2) internal successors, (51), 6 states have internal predecessors, (51), 3 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (23), 4 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-23 21:08:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 214 transitions. [2023-11-23 21:08:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-23 21:08:49,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:49,543 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-23 21:08:49,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:49,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-23 21:08:49,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:49,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash -948495900, now seen corresponding path program 1 times [2023-11-23 21:08:49,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:49,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218230611] [2023-11-23 21:08:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:49,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:50,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-23 21:08:57,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:57,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218230611] [2023-11-23 21:08:57,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218230611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:57,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119694863] [2023-11-23 21:08:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:57,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:57,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:57,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:57,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bcb63d4a-f64b-45f8-a153-800cdd018b4f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process