./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/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_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/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_c4cd683c-0f6b-4031-835b-51350612b3d3/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 7608d8aa64807891206ad38b93db31434f261f46ffbbb3a8b8a4940e4ab5ce81 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:15:37,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:15:37,263 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:15:37,269 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:15:37,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:15:37,297 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:15:37,297 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:15:37,298 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:15:37,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:15:37,300 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:15:37,300 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:15:37,301 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:15:37,301 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:15:37,302 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:15:37,303 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:15:37,303 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:15:37,304 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:15:37,304 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:15:37,305 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:15:37,306 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:15:37,306 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:15:37,307 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:15:37,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:15:37,308 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:15:37,309 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:15:37,309 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:15:37,309 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:15:37,310 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:15:37,310 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:15:37,311 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:15:37,311 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:15:37,312 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:15:37,312 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:15:37,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:15:37,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:37,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:15:37,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:15:37,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:15:37,314 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:15:37,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:15:37,314 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:15:37,315 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:15:37,315 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:15:37,315 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:15:37,315 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_c4cd683c-0f6b-4031-835b-51350612b3d3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7608d8aa64807891206ad38b93db31434f261f46ffbbb3a8b8a4940e4ab5ce81 [2023-11-23 21:15:37,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:15:37,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:15:37,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:15:37,598 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:15:37,598 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:15:37,600 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i [2023-11-23 21:15:40,799 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:15:41,477 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:15:41,479 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i [2023-11-23 21:15:41,526 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/data/fe3abf556/9fde3e49502d42b0b6bbb98362b3ca55/FLAG0ed0bad6f [2023-11-23 21:15:41,544 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/data/fe3abf556/9fde3e49502d42b0b6bbb98362b3ca55 [2023-11-23 21:15:41,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:15:41,555 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:15:41,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:41,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:15:41,571 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:15:41,572 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:41" (1/1) ... [2023-11-23 21:15:41,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c12dba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:41, skipping insertion in model container [2023-11-23 21:15:41,573 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:15:41" (1/1) ... [2023-11-23 21:15:41,736 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:15:42,120 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_c4cd683c-0f6b-4031-835b-51350612b3d3/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4494,4507] [2023-11-23 21:15:42,131 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_c4cd683c-0f6b-4031-835b-51350612b3d3/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4554,4567] [2023-11-23 21:15:43,593 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,595 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,595 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,603 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,606 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,657 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,658 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,660 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,661 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,663 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,664 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,665 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:43,666 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,166 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:15:44,167 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:15:44,168 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:15:44,169 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:15:44,171 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:15:44,172 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:15:44,172 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:15:44,173 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:15:44,174 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:15:44,174 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:15:44,738 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,740 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,780 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,793 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,800 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,803 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,828 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,829 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,830 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,830 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,831 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,832 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,832 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:44,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:44,939 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:15:44,964 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_c4cd683c-0f6b-4031-835b-51350612b3d3/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4494,4507] [2023-11-23 21:15:44,964 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_c4cd683c-0f6b-4031-835b-51350612b3d3/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4554,4567] [2023-11-23 21:15:45,001 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,005 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,006 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,008 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,008 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,014 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,015 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,016 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,016 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,017 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,018 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,018 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,019 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,056 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:15:45,058 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:15:45,058 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:15:45,060 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:15:45,060 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:15:45,062 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:15:45,062 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:15:45,063 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:15:45,063 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:15:45,064 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:15:45,113 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-11-23 21:15:45,292 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,293 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,302 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,303 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,306 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,306 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,320 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,321 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,322 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,323 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,323 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,324 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,324 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:15:45,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:15:45,670 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,670 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,670 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,671 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,671 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,671 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,671 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,671 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,671 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,671 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,672 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,672 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,672 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,672 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,672 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,672 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,673 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,673 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:15:45,680 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:15:45,681 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45 WrapperNode [2023-11-23 21:15:45,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:15:45,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:45,684 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:15:45,684 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:15:45,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:45,824 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:45,950 INFO L138 Inliner]: procedures = 772, calls = 2461, calls flagged for inlining = 66, calls inlined = 11, statements flattened = 749 [2023-11-23 21:15:45,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:15:45,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:15:45,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:15:45,952 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:15:45,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:45,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:45,987 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:45,987 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:46,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:46,055 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:46,067 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:46,074 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:46,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:15:46,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:15:46,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:15:46,091 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:15:46,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (1/1) ... [2023-11-23 21:15:46,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:15:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:46,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:15:46,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:15:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-23 21:15:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 21:15:46,176 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 21:15:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:15:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 21:15:46,177 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 21:15:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:15:46,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:15:46,177 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-23 21:15:46,178 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-23 21:15:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:15:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:15:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:15:46,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:15:46,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:15:46,179 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 21:15:46,180 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 21:15:46,180 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 21:15:46,181 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 21:15:46,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:15:46,181 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:15:46,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:15:46,181 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-23 21:15:46,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-23 21:15:46,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:15:46,182 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 21:15:46,182 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 21:15:46,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:15:46,182 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-23 21:15:46,183 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-23 21:15:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:15:46,183 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-23 21:15:46,183 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-23 21:15:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:15:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:15:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:15:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:15:46,184 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-11-23 21:15:46,184 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-11-23 21:15:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-23 21:15:46,185 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-23 21:15:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:15:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 21:15:46,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 21:15:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-23 21:15:46,187 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-23 21:15:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2023-11-23 21:15:46,187 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2023-11-23 21:15:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_delete [2023-11-23 21:15:46,187 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_delete [2023-11-23 21:15:46,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:15:46,617 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:15:46,622 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:15:46,886 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2023-11-23 21:15:46,887 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true; [2023-11-23 21:15:47,729 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:15:48,034 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:15:48,034 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-23 21:15:48,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:48 BoogieIcfgContainer [2023-11-23 21:15:48,036 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:15:48,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:15:48,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:15:48,042 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:15:48,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:15:41" (1/3) ... [2023-11-23 21:15:48,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a96f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:48, skipping insertion in model container [2023-11-23 21:15:48,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:15:45" (2/3) ... [2023-11-23 21:15:48,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a96f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:15:48, skipping insertion in model container [2023-11-23 21:15:48,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:15:48" (3/3) ... [2023-11-23 21:15:48,045 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_delete_harness.i [2023-11-23 21:15:48,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:15:48,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:15:48,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:15:48,177 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;@69e7ba45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:15:48,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:15:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2023-11-23 21:15:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 21:15:48,205 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:48,207 INFO L195 NwaCegarLoop]: trace histogram [19, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:48,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:48,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:48,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2105179692, now seen corresponding path program 1 times [2023-11-23 21:15:48,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:48,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650232113] [2023-11-23 21:15:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:48,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:48,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:15:48,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651190373] [2023-11-23 21:15:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:48,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:48,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:48,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:48,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:15:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:49,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 2489 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:15:49,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-23 21:15:49,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:49,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:49,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650232113] [2023-11-23 21:15:49,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:15:49,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651190373] [2023-11-23 21:15:49,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651190373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:49,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:49,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:15:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650775515] [2023-11-23 21:15:49,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:49,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:15:49,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:15:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:15:49,699 INFO L87 Difference]: Start difference. First operand has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Second operand has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-23 21:15:50,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:50,231 INFO L93 Difference]: Finished difference Result 304 states and 413 transitions. [2023-11-23 21:15:50,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:15:50,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 146 [2023-11-23 21:15:50,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:50,244 INFO L225 Difference]: With dead ends: 304 [2023-11-23 21:15:50,245 INFO L226 Difference]: Without dead ends: 169 [2023-11-23 21:15:50,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 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 21:15:50,253 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 1 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:50,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 736 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:15:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-23 21:15:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-11-23 21:15:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 95 states have internal predecessors, (109), 54 states have call successors, (54), 19 states have call predecessors, (54), 20 states have return successors, (54), 54 states have call predecessors, (54), 53 states have call successors, (54) [2023-11-23 21:15:50,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 217 transitions. [2023-11-23 21:15:50,314 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 217 transitions. Word has length 146 [2023-11-23 21:15:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:50,316 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 217 transitions. [2023-11-23 21:15:50,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2023-11-23 21:15:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 217 transitions. [2023-11-23 21:15:50,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-23 21:15:50,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:50,321 INFO L195 NwaCegarLoop]: trace histogram [19, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:50,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:15:50,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:50,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:50,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1419450348, now seen corresponding path program 1 times [2023-11-23 21:15:50,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:50,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844791787] [2023-11-23 21:15:50,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:50,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-11-23 21:15:53,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:53,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844791787] [2023-11-23 21:15:53,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844791787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:53,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:15:53,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:15:53,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564651966] [2023-11-23 21:15:53,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:53,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:15:53,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:15:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:15:53,491 INFO L87 Difference]: Start difference. First operand 169 states and 217 transitions. Second operand has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2023-11-23 21:15:54,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:54,310 INFO L93 Difference]: Finished difference Result 290 states and 376 transitions. [2023-11-23 21:15:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:15:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) Word has length 150 [2023-11-23 21:15:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:54,315 INFO L225 Difference]: With dead ends: 290 [2023-11-23 21:15:54,315 INFO L226 Difference]: Without dead ends: 171 [2023-11-23 21:15:54,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:15:54,318 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 6 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:54,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 822 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:15:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-23 21:15:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2023-11-23 21:15:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 97 states have internal predecessors, (110), 54 states have call successors, (54), 19 states have call predecessors, (54), 21 states have return successors, (55), 54 states have call predecessors, (55), 53 states have call successors, (55) [2023-11-23 21:15:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2023-11-23 21:15:54,340 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 150 [2023-11-23 21:15:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:54,341 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2023-11-23 21:15:54,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) [2023-11-23 21:15:54,342 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2023-11-23 21:15:54,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-23 21:15:54,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:54,345 INFO L195 NwaCegarLoop]: trace histogram [19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:54,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:15:54,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:54,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:54,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1888028867, now seen corresponding path program 1 times [2023-11-23 21:15:54,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:54,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685636038] [2023-11-23 21:15:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:54,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2023-11-23 21:15:56,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:56,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685636038] [2023-11-23 21:15:56,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685636038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:56,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891070712] [2023-11-23 21:15:56,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:56,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:56,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:56,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:56,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:15:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:56,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-23 21:15:56,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:57,051 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 21:15:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-11-23 21:15:57,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:15:57,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891070712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:15:57,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:15:57,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2023-11-23 21:15:57,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856950903] [2023-11-23 21:15:57,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:15:57,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 21:15:57,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:57,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 21:15:57,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:15:57,428 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2023-11-23 21:16:01,605 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 21:16:03,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:16:05,772 WARN L539 Checker$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 21:16:07,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:16:09,910 WARN L539 Checker$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 21:16:12,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:16:14,733 WARN L539 Checker$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 21:16:16,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:16:18,927 WARN L539 Checker$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 21:16:21,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:16:23,181 WARN L539 Checker$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 21:16:25,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:16:27,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 21:16:27,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:16:27,393 INFO L93 Difference]: Finished difference Result 339 states and 427 transitions. [2023-11-23 21:16:27,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:16:27,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) Word has length 156 [2023-11-23 21:16:27,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:16:27,397 INFO L225 Difference]: With dead ends: 339 [2023-11-23 21:16:27,397 INFO L226 Difference]: Without dead ends: 211 [2023-11-23 21:16:27,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:16:27,399 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 63 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 20 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:16:27,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1573 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 821 Invalid, 13 Unknown, 0 Unchecked, 29.7s Time] [2023-11-23 21:16:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-23 21:16:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2023-11-23 21:16:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 118 states have internal predecessors, (132), 62 states have call successors, (62), 27 states have call predecessors, (62), 29 states have return successors, (64), 62 states have call predecessors, (64), 61 states have call successors, (64) [2023-11-23 21:16:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 258 transitions. [2023-11-23 21:16:27,453 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 258 transitions. Word has length 156 [2023-11-23 21:16:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:16:27,454 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 258 transitions. [2023-11-23 21:16:27,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2023-11-23 21:16:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 258 transitions. [2023-11-23 21:16:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-11-23 21:16:27,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:16:27,462 INFO L195 NwaCegarLoop]: trace histogram [19, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:16:27,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:16:27,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:27,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:16:27,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:16:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1219957887, now seen corresponding path program 1 times [2023-11-23 21:16:27,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:16:27,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524474515] [2023-11-23 21:16:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:27,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:16:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:28,738 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2023-11-23 21:16:28,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:16:28,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524474515] [2023-11-23 21:16:28,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524474515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:16:28,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159820784] [2023-11-23 21:16:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:16:28,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:16:28,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:16:28,741 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:16:28,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4cd683c-0f6b-4031-835b-51350612b3d3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:16:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:16:29,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-23 21:16:29,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:16:29,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 21:16:30,044 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-23 21:16:30,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-23 21:16:30,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:16:30,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2023-11-23 21:16:30,752 INFO L349 Elim1Store]: treesize reduction 146, result has 31.5 percent of original size [2023-11-23 21:16:30,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 73 treesize of output 148 [2023-11-23 21:16:32,107 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-23 21:16:32,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 29 [2023-11-23 21:16:32,155 INFO L349 Elim1Store]: treesize reduction 127, result has 0.8 percent of original size [2023-11-23 21:16:32,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 41 treesize of output 1 [2023-11-23 21:16:32,175 INFO L349 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2023-11-23 21:16:32,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 1 [2023-11-23 21:16:32,196 INFO L349 Elim1Store]: treesize reduction 71, result has 1.4 percent of original size [2023-11-23 21:16:32,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 1 [2023-11-23 21:16:32,240 INFO L349 Elim1Store]: treesize reduction 98, result has 1.0 percent of original size [2023-11-23 21:16:32,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 41 treesize of output 1 [2023-11-23 21:16:32,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:16:32,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:16:32,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 21:16:32,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 21:16:32,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 21:16:32,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7