./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_remove_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_remove_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5 --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 92ad6b662f02418ebaf958a5d76b8b40c1669b4ab9a0ab643b0fe8bf2b83d3a1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:46:33,215 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:46:33,326 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:46:33,334 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:46:33,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:46:33,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:46:33,382 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:46:33,383 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:46:33,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:46:33,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:46:33,390 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:46:33,391 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:46:33,391 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:46:33,393 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:46:33,394 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:46:33,394 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:46:33,395 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:46:33,395 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:46:33,396 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:46:33,396 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:46:33,397 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:46:33,397 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:46:33,399 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:46:33,399 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:46:33,400 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:46:33,400 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:46:33,401 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:46:33,401 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:46:33,402 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:46:33,402 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:46:33,404 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:46:33,404 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:46:33,404 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:46:33,405 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:46:33,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:46:33,406 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:46:33,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:46:33,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:46:33,407 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:46:33,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:46:33,407 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:46:33,408 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:46:33,408 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:46:33,408 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:46:33,409 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_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92ad6b662f02418ebaf958a5d76b8b40c1669b4ab9a0ab643b0fe8bf2b83d3a1 [2023-11-21 19:46:33,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:46:33,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:46:33,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:46:33,689 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:46:33,689 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:46:33,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_remove_harness_negated.i [2023-11-21 19:46:36,850 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:46:37,401 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:46:37,401 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/sv-benchmarks/c/aws-c-common/aws_priority_queue_remove_harness_negated.i [2023-11-21 19:46:37,444 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/data/98128a814/08e2e10ddbf24a919dfdd07e6e1a910c/FLAGe2c16709a [2023-11-21 19:46:37,461 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/data/98128a814/08e2e10ddbf24a919dfdd07e6e1a910c [2023-11-21 19:46:37,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:46:37,465 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:46:37,467 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:46:37,467 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:46:37,473 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:46:37,474 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:46:37" (1/1) ... [2023-11-21 19:46:37,475 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49d8b21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:37, skipping insertion in model container [2023-11-21 19:46:37,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:46:37" (1/1) ... [2023-11-21 19:46:37,634 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:46:37,957 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_72dba73c-c9b2-428c-8e45-52716edf4777/sv-benchmarks/c/aws-c-common/aws_priority_queue_remove_harness_negated.i[4499,4512] [2023-11-21 19:46:37,967 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_72dba73c-c9b2-428c-8e45-52716edf4777/sv-benchmarks/c/aws-c-common/aws_priority_queue_remove_harness_negated.i[4559,4572] [2023-11-21 19:46:39,265 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,267 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,268 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,269 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,290 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,306 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,309 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,312 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,312 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,315 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,316 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,317 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,318 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:39,832 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 19:46:39,833 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 19:46:39,835 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 19:46:39,836 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 19:46:39,838 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 19:46:39,839 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 19:46:39,840 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 19:46:39,849 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 19:46:39,850 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 19:46:39,865 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 19:46:40,187 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,196 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,268 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,269 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,270 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,270 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,271 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,271 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,272 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,273 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,273 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,274 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,274 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,275 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,275 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,278 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,279 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,280 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,280 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,284 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,285 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,293 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,295 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,295 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,314 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,314 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,315 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,327 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:46:40,386 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:46:40,401 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_72dba73c-c9b2-428c-8e45-52716edf4777/sv-benchmarks/c/aws-c-common/aws_priority_queue_remove_harness_negated.i[4499,4512] [2023-11-21 19:46:40,402 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_72dba73c-c9b2-428c-8e45-52716edf4777/sv-benchmarks/c/aws-c-common/aws_priority_queue_remove_harness_negated.i[4559,4572] [2023-11-21 19:46:40,451 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,452 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,454 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,455 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,456 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,472 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,472 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,474 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,475 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,476 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,477 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,477 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,478 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,516 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 19:46:40,517 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 19:46:40,518 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 19:46:40,519 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 19:46:40,520 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 19:46:40,521 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 19:46:40,521 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 19:46:40,522 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 19:46:40,522 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 19:46:40,523 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 19:46:40,559 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,565 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,572 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7739-7750] [2023-11-21 19:46:40,599 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,600 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,601 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,601 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,601 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,602 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,602 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,603 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,603 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,603 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,604 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,604 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,605 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,605 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,606 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,606 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,607 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,610 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,610 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,617 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,618 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,618 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,624 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,625 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,625 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:46:40,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:46:40,930 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,930 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,930 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,930 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,931 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,931 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,932 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,932 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,932 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,932 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,932 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,932 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,933 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,933 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,934 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:46:40,941 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:46:40,942 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40 WrapperNode [2023-11-21 19:46:40,942 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:46:40,943 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:46:40,943 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:46:40,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:46:40,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,077 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,202 INFO L138 Inliner]: procedures = 696, calls = 1922, calls flagged for inlining = 60, calls inlined = 15, statements flattened = 1063 [2023-11-21 19:46:41,203 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:46:41,204 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:46:41,204 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:46:41,204 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:46:41,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,315 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,327 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,337 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:46:41,363 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:46:41,363 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:46:41,363 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:46:41,364 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (1/1) ... [2023-11-21 19:46:41,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:46:41,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:46:41,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:46:41,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:46:41,461 INFO L130 BoogieDeclarations]: Found specification of procedure s_swap [2023-11-21 19:46:41,461 INFO L138 BoogieDeclarations]: Found implementation of procedure s_swap [2023-11-21 19:46:41,461 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-21 19:46:41,461 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-21 19:46:41,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:46:41,462 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-21 19:46:41,462 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-21 19:46:41,462 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-21 19:46:41,462 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-21 19:46:41,462 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-21 19:46:41,462 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-21 19:46:41,462 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_up [2023-11-21 19:46:41,463 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_up [2023-11-21 19:46:41,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 19:46:41,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:46:41,463 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-21 19:46:41,463 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-21 19:46:41,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:46:41,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:46:41,464 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_node [2023-11-21 19:46:41,465 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_node [2023-11-21 19:46:41,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:46:41,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:46:41,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:46:41,466 INFO L130 BoogieDeclarations]: Found specification of procedure my_abort [2023-11-21 19:46:41,466 INFO L138 BoogieDeclarations]: Found implementation of procedure my_abort [2023-11-21 19:46:41,466 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-21 19:46:41,466 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-21 19:46:41,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:46:41,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:46:41,470 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-21 19:46:41,470 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-21 19:46:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-21 19:46:41,471 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-21 19:46:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 19:46:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-21 19:46:41,472 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-21 19:46:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-21 19:46:41,473 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-21 19:46:41,479 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-21 19:46:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-21 19:46:41,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-21 19:46:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-21 19:46:41,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:46:41,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:46:41,479 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-21 19:46:41,480 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-21 19:46:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_pop_back [2023-11-21 19:46:41,480 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_pop_back [2023-11-21 19:46:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:46:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:46:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:46:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_get_at_ptr [2023-11-21 19:46:41,480 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_get_at_ptr [2023-11-21 19:46:41,480 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-21 19:46:41,481 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-21 19:46:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-21 19:46:41,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-21 19:46:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:46:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-21 19:46:41,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-21 19:46:41,481 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_backpointer_index_valid [2023-11-21 19:46:41,481 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_backpointer_index_valid [2023-11-21 19:46:41,482 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 19:46:41,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 19:46:41,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:46:41,482 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_get_at [2023-11-21 19:46:41,482 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_get_at [2023-11-21 19:46:41,930 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:46:41,933 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:46:45,073 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:46:45,434 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:46:45,434 INFO L308 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-21 19:46:45,436 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:46:45 BoogieIcfgContainer [2023-11-21 19:46:45,436 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:46:45,438 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:46:45,438 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:46:45,441 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:46:45,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:46:37" (1/3) ... [2023-11-21 19:46:45,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2943b426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:46:45, skipping insertion in model container [2023-11-21 19:46:45,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:46:40" (2/3) ... [2023-11-21 19:46:45,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2943b426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:46:45, skipping insertion in model container [2023-11-21 19:46:45,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:46:45" (3/3) ... [2023-11-21 19:46:45,444 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_remove_harness_negated.i [2023-11-21 19:46:45,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:46:45,462 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 19:46:45,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:46:45,527 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;@9a76fc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:46:45,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 19:46:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 200 states have (on average 1.22) internal successors, (244), 205 states have internal predecessors, (244), 160 states have call successors, (160), 27 states have call predecessors, (160), 27 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-21 19:46:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-21 19:46:45,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:45,550 INFO L195 NwaCegarLoop]: trace histogram [9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:45,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:45,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1673351904, now seen corresponding path program 1 times [2023-11-21 19:46:45,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:45,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461832788] [2023-11-21 19:46:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:45,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-21 19:46:46,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:46,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461832788] [2023-11-21 19:46:47,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461832788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:46:47,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503512506] [2023-11-21 19:46:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:47,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:46:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:46:47,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:46:47,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:46:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:47,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 2369 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-21 19:46:47,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:46:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-21 19:46:47,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:46:47,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503512506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:47,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:46:47,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-11-21 19:46:47,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457409180] [2023-11-21 19:46:47,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 19:46:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:47,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 19:46:47,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:46:47,896 INFO L87 Difference]: Start difference. First operand has 390 states, 200 states have (on average 1.22) internal successors, (244), 205 states have internal predecessors, (244), 160 states have call successors, (160), 27 states have call predecessors, (160), 27 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-21 19:46:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:49,132 INFO L93 Difference]: Finished difference Result 711 states and 1086 transitions. [2023-11-21 19:46:49,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 19:46:49,137 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 106 [2023-11-21 19:46:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:49,158 INFO L225 Difference]: With dead ends: 711 [2023-11-21 19:46:49,158 INFO L226 Difference]: Without dead ends: 387 [2023-11-21 19:46:49,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:46:49,178 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:49,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 514 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-21 19:46:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-11-21 19:46:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2023-11-21 19:46:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 199 states have (on average 1.1909547738693467) internal successors, (237), 202 states have internal predecessors, (237), 160 states have call successors, (160), 27 states have call predecessors, (160), 26 states have return successors, (158), 158 states have call predecessors, (158), 158 states have call successors, (158) [2023-11-21 19:46:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 555 transitions. [2023-11-21 19:46:49,347 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 555 transitions. Word has length 106 [2023-11-21 19:46:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:49,350 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 555 transitions. [2023-11-21 19:46:49,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-21 19:46:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 555 transitions. [2023-11-21 19:46:49,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-21 19:46:49,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:49,356 INFO L195 NwaCegarLoop]: trace histogram [11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:49,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 19:46:49,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 19:46:49,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:49,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:49,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1599074656, now seen corresponding path program 1 times [2023-11-21 19:46:49,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:49,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289280714] [2023-11-21 19:46:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:49,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2023-11-21 19:46:50,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:50,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289280714] [2023-11-21 19:46:50,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289280714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:46:50,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681568937] [2023-11-21 19:46:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:50,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:46:50,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:46:50,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:46:50,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:46:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:51,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 2447 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 19:46:51,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:46:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-21 19:46:51,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:46:51,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681568937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:51,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:46:51,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-21 19:46:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794258247] [2023-11-21 19:46:51,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:51,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:46:51,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:51,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:46:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:46:51,306 INFO L87 Difference]: Start difference. First operand 387 states and 555 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-21 19:46:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:53,544 INFO L93 Difference]: Finished difference Result 746 states and 1086 transitions. [2023-11-21 19:46:53,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:46:53,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 118 [2023-11-21 19:46:53,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:53,561 INFO L225 Difference]: With dead ends: 746 [2023-11-21 19:46:53,562 INFO L226 Difference]: Without dead ends: 389 [2023-11-21 19:46:53,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:46:53,570 INFO L413 NwaCegarLoop]: 485 mSDtfsCounter, 50 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:53,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1845 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-21 19:46:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-11-21 19:46:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2023-11-21 19:46:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 200 states have (on average 1.19) internal successors, (238), 204 states have internal predecessors, (238), 160 states have call successors, (160), 27 states have call predecessors, (160), 27 states have return successors, (171), 158 states have call predecessors, (171), 158 states have call successors, (171) [2023-11-21 19:46:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 569 transitions. [2023-11-21 19:46:53,658 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 569 transitions. Word has length 118 [2023-11-21 19:46:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:53,661 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 569 transitions. [2023-11-21 19:46:53,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-21 19:46:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 569 transitions. [2023-11-21 19:46:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-21 19:46:53,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:53,665 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:53,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:46:53,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-21 19:46:53,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:53,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:53,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1002920644, now seen corresponding path program 1 times [2023-11-21 19:46:53,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:53,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668241178] [2023-11-21 19:46:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:53,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-21 19:46:54,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:54,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668241178] [2023-11-21 19:46:54,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668241178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:46:54,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729157615] [2023-11-21 19:46:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:54,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:46:54,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:46:54,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:46:54,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:46:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:55,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 2497 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:46:55,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:46:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-21 19:46:55,624 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:46:55,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729157615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:55,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:46:55,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-21 19:46:55,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361562135] [2023-11-21 19:46:55,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:55,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:46:55,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:55,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:46:55,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-21 19:46:55,630 INFO L87 Difference]: Start difference. First operand 389 states and 569 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-21 19:46:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:46:58,006 INFO L93 Difference]: Finished difference Result 761 states and 1145 transitions. [2023-11-21 19:46:58,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:46:58,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 126 [2023-11-21 19:46:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:46:58,013 INFO L225 Difference]: With dead ends: 761 [2023-11-21 19:46:58,013 INFO L226 Difference]: Without dead ends: 402 [2023-11-21 19:46:58,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-11-21 19:46:58,018 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 65 mSDsluCounter, 2221 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 2692 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:46:58,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 2692 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-21 19:46:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2023-11-21 19:46:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2023-11-21 19:46:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 208 states have (on average 1.1923076923076923) internal successors, (248), 212 states have internal predecessors, (248), 162 states have call successors, (162), 27 states have call predecessors, (162), 28 states have return successors, (190), 161 states have call predecessors, (190), 160 states have call successors, (190) [2023-11-21 19:46:58,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 600 transitions. [2023-11-21 19:46:58,068 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 600 transitions. Word has length 126 [2023-11-21 19:46:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:46:58,070 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 600 transitions. [2023-11-21 19:46:58,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 4 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-21 19:46:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 600 transitions. [2023-11-21 19:46:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-21 19:46:58,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:46:58,077 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:46:58,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:46:58,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-21 19:46:58,300 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:46:58,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:46:58,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1320290236, now seen corresponding path program 1 times [2023-11-21 19:46:58,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:46:58,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220687707] [2023-11-21 19:46:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:58,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:46:58,454 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:46:58,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515319860] [2023-11-21 19:46:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:46:58,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:46:58,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:46:58,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:46:58,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:46:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:46:59,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 2629 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:46:59,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:46:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-21 19:46:59,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:46:59,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:46:59,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220687707] [2023-11-21 19:46:59,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:46:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515319860] [2023-11-21 19:46:59,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515319860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:46:59,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:46:59,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:46:59,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656070341] [2023-11-21 19:46:59,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:46:59,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:46:59,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:46:59,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:46:59,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:46:59,446 INFO L87 Difference]: Start difference. First operand 400 states and 600 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-21 19:47:01,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:01,029 INFO L93 Difference]: Finished difference Result 776 states and 1192 transitions. [2023-11-21 19:47:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:47:01,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 135 [2023-11-21 19:47:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:01,034 INFO L225 Difference]: With dead ends: 776 [2023-11-21 19:47:01,035 INFO L226 Difference]: Without dead ends: 406 [2023-11-21 19:47:01,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:47:01,038 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 57 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:01,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 2298 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-21 19:47:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-11-21 19:47:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 400. [2023-11-21 19:47:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 208 states have (on average 1.1923076923076923) internal successors, (248), 212 states have internal predecessors, (248), 162 states have call successors, (162), 27 states have call predecessors, (162), 28 states have return successors, (190), 161 states have call predecessors, (190), 160 states have call successors, (190) [2023-11-21 19:47:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 600 transitions. [2023-11-21 19:47:01,074 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 600 transitions. Word has length 135 [2023-11-21 19:47:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:01,075 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 600 transitions. [2023-11-21 19:47:01,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 4 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-21 19:47:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 600 transitions. [2023-11-21 19:47:01,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-21 19:47:01,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:01,078 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:01,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:01,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:01,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:01,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash -251602685, now seen corresponding path program 1 times [2023-11-21 19:47:01,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:01,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881095138] [2023-11-21 19:47:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:01,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:01,432 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:01,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57544895] [2023-11-21 19:47:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:01,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:01,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:01,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:01,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 19:47:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:02,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 2683 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:47:02,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-11-21 19:47:02,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:47:02,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:02,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881095138] [2023-11-21 19:47:02,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:02,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57544895] [2023-11-21 19:47:02,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57544895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:02,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:02,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 19:47:02,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438582410] [2023-11-21 19:47:02,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:02,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:47:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:47:02,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:47:02,368 INFO L87 Difference]: Start difference. First operand 400 states and 600 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-21 19:47:03,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:47:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:06,240 INFO L93 Difference]: Finished difference Result 778 states and 1184 transitions. [2023-11-21 19:47:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 19:47:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 143 [2023-11-21 19:47:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:06,245 INFO L225 Difference]: With dead ends: 778 [2023-11-21 19:47:06,246 INFO L226 Difference]: Without dead ends: 408 [2023-11-21 19:47:06,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-21 19:47:06,250 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 80 mSDsluCounter, 2642 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 3107 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:06,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 3107 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-21 19:47:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-11-21 19:47:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 400. [2023-11-21 19:47:06,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 208 states have (on average 1.1923076923076923) internal successors, (248), 212 states have internal predecessors, (248), 162 states have call successors, (162), 27 states have call predecessors, (162), 28 states have return successors, (190), 161 states have call predecessors, (190), 160 states have call successors, (190) [2023-11-21 19:47:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 600 transitions. [2023-11-21 19:47:06,284 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 600 transitions. Word has length 143 [2023-11-21 19:47:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:06,285 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 600 transitions. [2023-11-21 19:47:06,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2023-11-21 19:47:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 600 transitions. [2023-11-21 19:47:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-21 19:47:06,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:06,289 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:06,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:06,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:06,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:06,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:06,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1638113523, now seen corresponding path program 2 times [2023-11-21 19:47:06,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:06,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678885380] [2023-11-21 19:47:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:06,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:06,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:06,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149490224] [2023-11-21 19:47:06,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 19:47:06,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:06,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:06,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:06,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 19:47:07,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-21 19:47:07,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:47:07,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:47:07,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-21 19:47:07,562 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:47:07,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:07,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678885380] [2023-11-21 19:47:07,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:07,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149490224] [2023-11-21 19:47:07,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149490224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:07,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:07,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 19:47:07,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597544423] [2023-11-21 19:47:07,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:07,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:47:07,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:07,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:47:07,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:47:07,567 INFO L87 Difference]: Start difference. First operand 400 states and 600 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-21 19:47:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:09,818 INFO L93 Difference]: Finished difference Result 408 states and 608 transitions. [2023-11-21 19:47:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:47:09,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 152 [2023-11-21 19:47:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:09,824 INFO L225 Difference]: With dead ends: 408 [2023-11-21 19:47:09,824 INFO L226 Difference]: Without dead ends: 406 [2023-11-21 19:47:09,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:47:09,826 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 5 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:09,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2525 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-21 19:47:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2023-11-21 19:47:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 405. [2023-11-21 19:47:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 211 states have (on average 1.1895734597156398) internal successors, (251), 215 states have internal predecessors, (251), 163 states have call successors, (163), 28 states have call predecessors, (163), 29 states have return successors, (191), 162 states have call predecessors, (191), 161 states have call successors, (191) [2023-11-21 19:47:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 605 transitions. [2023-11-21 19:47:09,859 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 605 transitions. Word has length 152 [2023-11-21 19:47:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:09,860 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 605 transitions. [2023-11-21 19:47:09,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-21 19:47:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 605 transitions. [2023-11-21 19:47:09,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-21 19:47:09,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:09,864 INFO L195 NwaCegarLoop]: trace histogram [11, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:47:09,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-21 19:47:10,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:10,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [my_abortErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:10,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:10,077 INFO L85 PathProgramCache]: Analyzing trace with hash -173812033, now seen corresponding path program 3 times [2023-11-21 19:47:10,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:10,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434909631] [2023-11-21 19:47:10,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:10,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:10,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:47:10,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412265376] [2023-11-21 19:47:10,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 19:47:10,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:10,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:10,228 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:10,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dba73c-c9b2-428c-8e45-52716edf4777/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 19:47:10,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 19:47:10,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 19:47:10,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-21 19:47:10,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-11-21 19:47:11,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-21 19:47:11,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:11,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434909631] [2023-11-21 19:47:11,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:47:11,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412265376] [2023-11-21 19:47:11,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412265376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:47:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428350218] [2023-11-21 19:47:11,814 INFO L159 IcfgInterpreter]: Started Sifa with 89 locations of interest [2023-11-21 19:47:11,814 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:11,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:11,828 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:11,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs