./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX --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 1d3eb02e894c2acef7732d0e57c112cc2c197f8f03d7c13822f169fbed4dc5e5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:01:02,117 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:01:02,225 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 01:01:02,230 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:01:02,231 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:01:02,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:01:02,266 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:01:02,267 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:01:02,268 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:01:02,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:01:02,274 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:01:02,275 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:01:02,276 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:01:02,277 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:01:02,278 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:01:02,278 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:01:02,279 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:01:02,279 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:01:02,279 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:01:02,280 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:01:02,282 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:01:02,282 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:01:02,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:01:02,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:01:02,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:01:02,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:01:02,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:01:02,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:01:02,285 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:01:02,286 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:01:02,286 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:01:02,286 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:01:02,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:01:02,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:02,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:01:02,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:01:02,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:01:02,310 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:01:02,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:01:02,310 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:01:02,311 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:01:02,312 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:01:02,312 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_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d3eb02e894c2acef7732d0e57c112cc2c197f8f03d7c13822f169fbed4dc5e5 [2023-11-12 01:01:02,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:01:02,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:01:02,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:01:02,667 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:01:02,668 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:01:02,670 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i [2023-11-12 01:01:05,683 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:01:06,217 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:01:06,218 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i [2023-11-12 01:01:06,265 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/data/7bc696518/89ca4f27b6344d878e5ae8dfaa6189a3/FLAG7ab5f52dc [2023-11-12 01:01:06,280 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/data/7bc696518/89ca4f27b6344d878e5ae8dfaa6189a3 [2023-11-12 01:01:06,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:01:06,289 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:01:06,294 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:06,294 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:01:06,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:01:06,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:06" (1/1) ... [2023-11-12 01:01:06,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316bd4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:06, skipping insertion in model container [2023-11-12 01:01:06,302 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:06" (1/1) ... [2023-11-12 01:01:06,477 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:01:06,743 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_d673a34f-a09d-45f7-832a-34d71cf3dec7/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4504,4517] [2023-11-12 01:01:06,751 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_d673a34f-a09d-45f7-832a-34d71cf3dec7/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4564,4577] [2023-11-12 01:01:07,875 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,877 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,878 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,883 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,885 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,907 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,911 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,913 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,915 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,917 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,919 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,920 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:07,920 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,366 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 01:01:08,367 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 01:01:08,368 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 01:01:08,370 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 01:01:08,371 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 01:01:08,372 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 01:01:08,373 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 01:01:08,374 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 01:01:08,374 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 01:01:08,375 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 01:01:08,584 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,585 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,591 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,598 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,711 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,713 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,714 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,714 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,715 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,715 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,716 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,719 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,720 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,720 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,721 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,722 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,722 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,726 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,727 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,730 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,730 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,734 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,735 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,746 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,749 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,750 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:08,831 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:01:08,858 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_d673a34f-a09d-45f7-832a-34d71cf3dec7/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4504,4517] [2023-11-12 01:01:08,860 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_d673a34f-a09d-45f7-832a-34d71cf3dec7/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4564,4577] [2023-11-12 01:01:08,925 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,926 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,926 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,926 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,932 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,945 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,946 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,948 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,948 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,949 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,950 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,951 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:08,952 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,007 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 01:01:09,008 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 01:01:09,009 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 01:01:09,010 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 01:01:09,011 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 01:01:09,011 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 01:01:09,012 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 01:01:09,012 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 01:01:09,013 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 01:01:09,014 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 01:01:09,072 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,073 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,075 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,081 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,088 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7776-7787] [2023-11-12 01:01:09,120 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,121 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,122 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,123 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,123 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,124 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,124 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,125 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,126 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,126 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,126 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,127 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,127 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,128 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,128 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,129 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,129 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,132 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,133 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,141 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,142 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,143 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:01:09,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:09,412 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,414 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,414 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,414 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,415 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,415 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,415 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,415 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,415 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,415 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,415 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,415 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,417 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,417 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,417 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:01:09,425 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:01:09,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09 WrapperNode [2023-11-12 01:01:09,428 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:09,429 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:09,429 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:01:09,429 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:01:09,459 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,570 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,683 INFO L138 Inliner]: procedures = 696, calls = 1906, calls flagged for inlining = 59, calls inlined = 14, statements flattened = 845 [2023-11-12 01:01:09,684 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:09,685 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:01:09,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:01:09,686 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:01:09,696 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,817 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,838 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,845 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,868 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:01:09,869 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:01:09,869 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:01:09,870 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:01:09,870 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (1/1) ... [2023-11-12 01:01:09,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:09,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:09,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:01:09,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure s_swap [2023-11-12 01:01:09,951 INFO L138 BoogieDeclarations]: Found implementation of procedure s_swap [2023-11-12 01:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-12 01:01:09,951 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-12 01:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:01:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-12 01:01:09,951 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-12 01:01:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-12 01:01:09,952 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-12 01:01:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 01:01:09,952 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 01:01:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 01:01:09,953 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 01:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 01:01:09,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 01:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:01:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:01:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-12 01:01:09,954 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-12 01:01:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:01:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:01:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 01:01:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 01:01:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-11-12 01:01:09,955 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-11-12 01:01:09,956 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 01:01:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 01:01:09,956 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-12 01:01:09,956 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-12 01:01:09,956 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-12 01:01:09,957 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-12 01:01:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-12 01:01:09,960 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-12 01:01:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 01:01:09,961 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 01:01:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-12 01:01:09,962 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-12 01:01:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:01:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:01:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_down [2023-11-12 01:01:09,963 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_down [2023-11-12 01:01:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 01:01:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_get_at_ptr [2023-11-12 01:01:09,969 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_get_at_ptr [2023-11-12 01:01:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 01:01:09,969 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 01:01:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 01:01:09,970 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 01:01:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:01:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-12 01:01:09,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-12 01:01:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_backpointer_index_valid [2023-11-12 01:01:09,970 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_backpointer_index_valid [2023-11-12 01:01:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 01:01:09,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 01:01:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:01:10,423 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:01:10,425 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:01:11,834 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:01:12,132 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:01:12,132 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-12 01:01:12,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:12 BoogieIcfgContainer [2023-11-12 01:01:12,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:01:12,138 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:01:12,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:01:12,142 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:01:12,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:01:06" (1/3) ... [2023-11-12 01:01:12,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f267f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:12, skipping insertion in model container [2023-11-12 01:01:12,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:09" (2/3) ... [2023-11-12 01:01:12,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f267f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:12, skipping insertion in model container [2023-11-12 01:01:12,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:12" (3/3) ... [2023-11-12 01:01:12,144 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_s_sift_down_harness.i [2023-11-12 01:01:12,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:01:12,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:01:12,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:01:12,231 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;@21d1ec03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:01:12,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:01:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 269 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 141 states have internal predecessors, (167), 104 states have call successors, (104), 23 states have call predecessors, (104), 23 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-12 01:01:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-12 01:01:12,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:12,255 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 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] [2023-11-12 01:01:12,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:12,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1507361086, now seen corresponding path program 1 times [2023-11-12 01:01:12,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:12,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384837375] [2023-11-12 01:01:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:12,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-11-12 01:01:13,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:13,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384837375] [2023-11-12 01:01:13,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384837375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:13,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243829385] [2023-11-12 01:01:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:13,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:13,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:13,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:13,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:01:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:14,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 2286 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 01:01:14,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-12 01:01:14,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:14,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243829385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:14,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:14,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-12 01:01:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049852179] [2023-11-12 01:01:14,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:14,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:14,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:14,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:01:14,435 INFO L87 Difference]: Start difference. First operand has 269 states, 140 states have (on average 1.1928571428571428) internal successors, (167), 141 states have internal predecessors, (167), 104 states have call successors, (104), 23 states have call predecessors, (104), 23 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-12 01:01:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:15,101 INFO L93 Difference]: Finished difference Result 498 states and 725 transitions. [2023-11-12 01:01:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:15,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 121 [2023-11-12 01:01:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:15,118 INFO L225 Difference]: With dead ends: 498 [2023-11-12 01:01:15,118 INFO L226 Difference]: Without dead ends: 269 [2023-11-12 01:01:15,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:15,128 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 34 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:15,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1190 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:01:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-12 01:01:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-11-12 01:01:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 140 states have (on average 1.1714285714285715) internal successors, (164), 142 states have internal predecessors, (164), 104 states have call successors, (104), 23 states have call predecessors, (104), 24 states have return successors, (107), 103 states have call predecessors, (107), 103 states have call successors, (107) [2023-11-12 01:01:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2023-11-12 01:01:15,221 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 121 [2023-11-12 01:01:15,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:15,223 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2023-11-12 01:01:15,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 3 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-12 01:01:15,224 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2023-11-12 01:01:15,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-12 01:01:15,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:15,235 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:15,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:15,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:15,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:15,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:15,444 INFO L85 PathProgramCache]: Analyzing trace with hash 330390940, now seen corresponding path program 1 times [2023-11-12 01:01:15,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:15,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161560262] [2023-11-12 01:01:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:15,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2023-11-12 01:01:16,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:16,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161560262] [2023-11-12 01:01:16,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161560262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:16,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104880382] [2023-11-12 01:01:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:16,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:16,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:16,264 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:16,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:01:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:16,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 2336 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:01:16,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-12 01:01:17,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:17,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104880382] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:17,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:17,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-12 01:01:17,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554066578] [2023-11-12 01:01:17,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:17,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:01:17,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:17,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:01:17,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:01:17,078 INFO L87 Difference]: Start difference. First operand 269 states and 375 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-12 01:01:17,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:17,990 INFO L93 Difference]: Finished difference Result 509 states and 724 transitions. [2023-11-12 01:01:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:01:17,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 129 [2023-11-12 01:01:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:17,997 INFO L225 Difference]: With dead ends: 509 [2023-11-12 01:01:17,997 INFO L226 Difference]: Without dead ends: 282 [2023-11-12 01:01:18,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:01:18,006 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 48 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:18,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1744 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 01:01:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-12 01:01:18,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2023-11-12 01:01:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 150 states have internal predecessors, (174), 106 states have call successors, (106), 23 states have call predecessors, (106), 25 states have return successors, (120), 106 states have call predecessors, (120), 105 states have call successors, (120) [2023-11-12 01:01:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 400 transitions. [2023-11-12 01:01:18,067 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 400 transitions. Word has length 129 [2023-11-12 01:01:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:18,069 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 400 transitions. [2023-11-12 01:01:18,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2023-11-12 01:01:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 400 transitions. [2023-11-12 01:01:18,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-12 01:01:18,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:18,081 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:18,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:18,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:18,297 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:18,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1687846566, now seen corresponding path program 1 times [2023-11-12 01:01:18,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:18,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871325552] [2023-11-12 01:01:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:18,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:18,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:01:18,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287162680] [2023-11-12 01:01:18,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:18,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:18,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:18,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:18,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:01:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:19,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 2468 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:01:19,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-12 01:01:19,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:19,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:19,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871325552] [2023-11-12 01:01:19,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:01:19,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287162680] [2023-11-12 01:01:19,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287162680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:19,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:19,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:01:19,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167000188] [2023-11-12 01:01:19,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:19,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:01:19,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:19,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:01:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:19,171 INFO L87 Difference]: Start difference. First operand 280 states and 400 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-12 01:01:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:19,808 INFO L93 Difference]: Finished difference Result 524 states and 756 transitions. [2023-11-12 01:01:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:01:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 138 [2023-11-12 01:01:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:19,813 INFO L225 Difference]: With dead ends: 524 [2023-11-12 01:01:19,814 INFO L226 Difference]: Without dead ends: 286 [2023-11-12 01:01:19,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-12 01:01:19,817 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 41 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:19,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1476 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:01:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-12 01:01:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2023-11-12 01:01:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 150 states have internal predecessors, (174), 106 states have call successors, (106), 23 states have call predecessors, (106), 25 states have return successors, (120), 106 states have call predecessors, (120), 105 states have call successors, (120) [2023-11-12 01:01:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 400 transitions. [2023-11-12 01:01:19,850 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 400 transitions. Word has length 138 [2023-11-12 01:01:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:19,851 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 400 transitions. [2023-11-12 01:01:19,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 4 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-11-12 01:01:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 400 transitions. [2023-11-12 01:01:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-12 01:01:19,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:19,854 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:19,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:20,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:20,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:20,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:20,066 INFO L85 PathProgramCache]: Analyzing trace with hash -69568610, now seen corresponding path program 1 times [2023-11-12 01:01:20,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:20,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838575156] [2023-11-12 01:01:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:20,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:20,213 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:01:20,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908874603] [2023-11-12 01:01:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:20,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:20,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:20,215 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:20,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:01:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:20,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 01:01:20,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-12 01:01:21,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:21,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:21,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838575156] [2023-11-12 01:01:21,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:01:21,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908874603] [2023-11-12 01:01:21,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908874603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:21,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:21,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 01:01:21,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636939451] [2023-11-12 01:01:21,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:21,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:01:21,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:01:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-12 01:01:21,043 INFO L87 Difference]: Start difference. First operand 280 states and 400 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-11-12 01:01:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:21,993 INFO L93 Difference]: Finished difference Result 526 states and 757 transitions. [2023-11-12 01:01:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:01:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) Word has length 146 [2023-11-12 01:01:21,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:22,000 INFO L225 Difference]: With dead ends: 526 [2023-11-12 01:01:22,000 INFO L226 Difference]: Without dead ends: 288 [2023-11-12 01:01:22,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-12 01:01:22,003 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 64 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:22,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1993 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 01:01:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-12 01:01:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 280. [2023-11-12 01:01:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 150 states have internal predecessors, (174), 106 states have call successors, (106), 23 states have call predecessors, (106), 25 states have return successors, (120), 106 states have call predecessors, (120), 105 states have call successors, (120) [2023-11-12 01:01:22,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 400 transitions. [2023-11-12 01:01:22,035 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 400 transitions. Word has length 146 [2023-11-12 01:01:22,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:22,036 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 400 transitions. [2023-11-12 01:01:22,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 5 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 5 states have call predecessors, (28), 5 states have call successors, (28) [2023-11-12 01:01:22,036 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 400 transitions. [2023-11-12 01:01:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-12 01:01:22,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:22,042 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:22,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:22,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:22,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:22,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:22,253 INFO L85 PathProgramCache]: Analyzing trace with hash 630374014, now seen corresponding path program 2 times [2023-11-12 01:01:22,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:22,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776745307] [2023-11-12 01:01:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:22,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:22,359 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:01:22,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464023679] [2023-11-12 01:01:22,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 01:01:22,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:22,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:22,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:22,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:01:22,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-12 01:01:22,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:22,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 01:01:22,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-12 01:01:22,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:22,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:22,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776745307] [2023-11-12 01:01:22,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:01:22,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464023679] [2023-11-12 01:01:22,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464023679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:22,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:22,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:01:22,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140679472] [2023-11-12 01:01:22,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:22,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:01:22,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:22,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:01:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:22,963 INFO L87 Difference]: Start difference. First operand 280 states and 400 transitions. Second operand has 5 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-12 01:01:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:23,495 INFO L93 Difference]: Finished difference Result 484 states and 706 transitions. [2023-11-12 01:01:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:01:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 155 [2023-11-12 01:01:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:23,499 INFO L225 Difference]: With dead ends: 484 [2023-11-12 01:01:23,500 INFO L226 Difference]: Without dead ends: 280 [2023-11-12 01:01:23,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:01:23,502 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 0 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:23,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1205 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:01:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-12 01:01:23,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2023-11-12 01:01:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 150 states have internal predecessors, (174), 106 states have call successors, (106), 23 states have call predecessors, (106), 25 states have return successors, (119), 106 states have call predecessors, (119), 105 states have call successors, (119) [2023-11-12 01:01:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 399 transitions. [2023-11-12 01:01:23,522 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 399 transitions. Word has length 155 [2023-11-12 01:01:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:23,523 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 399 transitions. [2023-11-12 01:01:23,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 19.0) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (31), 2 states have call predecessors, (31), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-11-12 01:01:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 399 transitions. [2023-11-12 01:01:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-12 01:01:23,527 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:23,527 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:23,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:23,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:23,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:23,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:23,736 INFO L85 PathProgramCache]: Analyzing trace with hash 977362822, now seen corresponding path program 3 times [2023-11-12 01:01:23,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:23,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709458016] [2023-11-12 01:01:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:23,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:23,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:01:23,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990399955] [2023-11-12 01:01:23,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 01:01:23,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:23,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:23,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:23,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d673a34f-a09d-45f7-832a-34d71cf3dec7/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 01:01:24,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 01:01:24,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 01:01:24,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-12 01:01:24,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-12 01:01:24,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:01:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-12 01:01:24,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709458016] [2023-11-12 01:01:24,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:01:24,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990399955] [2023-11-12 01:01:24,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990399955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:01:24,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1900838411] [2023-11-12 01:01:24,930 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2023-11-12 01:01:24,931 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:01:24,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:01:24,943 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:01:24,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs