./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b9c6758ce95672dce3a80ced0038fb12c5d303c7f51f11e2d6af9ddfb735b727 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:03:02,919 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:03:03,005 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:03:03,011 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:03:03,012 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:03:03,065 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:03:03,065 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:03:03,066 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:03:03,067 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:03:03,072 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:03:03,073 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:03:03,074 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:03:03,075 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:03:03,077 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:03:03,077 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:03:03,078 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:03:03,078 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:03:03,078 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:03:03,079 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:03:03,080 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:03:03,080 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:03:03,081 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:03:03,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:03:03,083 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:03:03,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:03:03,083 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:03:03,084 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:03:03,084 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:03:03,085 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:03:03,085 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:03:03,087 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:03:03,087 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:03:03,087 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:03:03,088 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:03:03,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:03,088 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:03:03,089 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:03:03,089 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:03:03,089 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:03:03,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:03:03,090 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:03:03,090 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:03:03,090 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:03:03,091 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:03:03,091 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_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9c6758ce95672dce3a80ced0038fb12c5d303c7f51f11e2d6af9ddfb735b727 [2023-11-25 00:03:03,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:03:03,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:03:03,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:03:03,458 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:03:03,459 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:03:03,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i [2023-11-25 00:03:06,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:03:07,345 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:03:07,348 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i [2023-11-25 00:03:07,410 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/data/68a477b70/cd95355f87cc4fa69d15b10ee663ab5d/FLAG6fb862dba [2023-11-25 00:03:07,431 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/data/68a477b70/cd95355f87cc4fa69d15b10ee663ab5d [2023-11-25 00:03:07,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:03:07,444 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:03:07,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:07,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:03:07,458 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:03:07,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:07" (1/1) ... [2023-11-25 00:03:07,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e66d1e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:07, skipping insertion in model container [2023-11-25 00:03:07,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:03:07" (1/1) ... [2023-11-25 00:03:07,677 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:03:08,049 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_29660f0b-223e-4b44-a9a6-d14e77e0fe46/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i[4495,4508] [2023-11-25 00:03:08,061 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_29660f0b-223e-4b44-a9a6-d14e77e0fe46/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i[4555,4568] [2023-11-25 00:03:09,521 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,522 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,523 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,524 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,526 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,547 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,548 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,551 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,552 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,554 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,556 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,557 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:09,557 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:10,278 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:03:10,280 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:03:10,281 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:03:10,283 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:03:10,284 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:03:10,285 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:03:10,286 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:03:10,287 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:03:10,288 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:03:10,289 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:03:11,176 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,177 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,235 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,237 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,244 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,246 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,280 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,281 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,282 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,283 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,284 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,286 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,287 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,352 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:11,412 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:03:11,439 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_29660f0b-223e-4b44-a9a6-d14e77e0fe46/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i[4495,4508] [2023-11-25 00:03:11,440 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_29660f0b-223e-4b44-a9a6-d14e77e0fe46/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i[4555,4568] [2023-11-25 00:03:11,511 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,512 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,515 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,530 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,531 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,532 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,533 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,534 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,535 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,536 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,537 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,578 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:03:11,579 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:03:11,580 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:03:11,581 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:03:11,582 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:03:11,583 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:03:11,584 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:03:11,584 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:03:11,585 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:03:11,587 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:03:11,643 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7544-7555] [2023-11-25 00:03:11,751 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,751 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,761 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,762 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,765 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,766 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,780 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,781 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,782 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,782 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,783 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,783 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,783 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:03:11,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:03:12,183 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,184 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,184 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,184 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,184 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,184 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,184 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,185 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,185 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,185 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,185 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,185 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,185 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,186 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,186 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,186 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,186 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,186 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:03:12,199 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:03:12,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12 WrapperNode [2023-11-25 00:03:12,200 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:03:12,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:12,202 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:03:12,203 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:03:12,212 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,368 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,486 INFO L138 Inliner]: procedures = 773, calls = 2500, calls flagged for inlining = 69, calls inlined = 19, statements flattened = 1094 [2023-11-25 00:03:12,487 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:03:12,488 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:03:12,488 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:03:12,488 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:03:12,499 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,562 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,577 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,606 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,615 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,658 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:03:12,659 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:03:12,660 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:03:12,660 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:03:12,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (1/1) ... [2023-11-25 00:03:12,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:03:12,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:12,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:03:12,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:03:12,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-25 00:03:12,766 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-25 00:03:12,766 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-25 00:03:12,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-11-25 00:03:12,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:03:12,767 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-25 00:03:12,767 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-25 00:03:12,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:03:12,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:03:12,767 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-25 00:03:12,767 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-25 00:03:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:03:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:03:12,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:03:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:03:12,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:03:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-25 00:03:12,769 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-25 00:03:12,769 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-25 00:03:12,770 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-25 00:03:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-25 00:03:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:03:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-25 00:03:12,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-25 00:03:12,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:03:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-25 00:03:12,771 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-25 00:03:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:03:12,771 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2023-11-25 00:03:12,772 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2023-11-25 00:03:12,772 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-25 00:03:12,772 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-25 00:03:12,772 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-25 00:03:12,773 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-25 00:03:12,773 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2023-11-25 00:03:12,773 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2023-11-25 00:03:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-11-25 00:03:12,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-11-25 00:03:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:03:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-25 00:03:12,774 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-25 00:03:12,774 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-25 00:03:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-25 00:03:12,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-25 00:03:12,776 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-11-25 00:03:12,776 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-11-25 00:03:12,777 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2023-11-25 00:03:12,777 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2023-11-25 00:03:12,777 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2023-11-25 00:03:12,777 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2023-11-25 00:03:12,777 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:03:12,778 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:03:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-25 00:03:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-25 00:03:12,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:03:12,783 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-25 00:03:12,784 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-25 00:03:12,784 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-25 00:03:12,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-25 00:03:12,785 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-25 00:03:12,786 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-25 00:03:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2023-11-25 00:03:12,787 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2023-11-25 00:03:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-25 00:03:12,794 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-25 00:03:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2023-11-25 00:03:12,794 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2023-11-25 00:03:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-25 00:03:12,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-25 00:03:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:03:13,250 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:03:13,254 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:03:13,582 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2023-11-25 00:03:13,583 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true; [2023-11-25 00:03:13,622 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2023-11-25 00:03:13,672 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-11-25 00:03:14,979 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !true; [2023-11-25 00:03:14,979 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-11-25 00:03:15,013 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:03:15,309 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:03:15,309 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-25 00:03:15,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:15 BoogieIcfgContainer [2023-11-25 00:03:15,317 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:03:15,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:03:15,321 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:03:15,325 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:03:15,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:03:07" (1/3) ... [2023-11-25 00:03:15,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5406a336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:15, skipping insertion in model container [2023-11-25 00:03:15,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:03:12" (2/3) ... [2023-11-25 00:03:15,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5406a336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:03:15, skipping insertion in model container [2023-11-25 00:03:15,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:03:15" (3/3) ... [2023-11-25 00:03:15,331 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_remove_harness_negated.i [2023-11-25 00:03:15,355 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:03:15,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:03:15,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:03:15,461 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;@62feb444, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:03:15,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:03:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-25 00:03:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-25 00:03:15,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:15,491 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:15,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:15,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:15,502 INFO L85 PathProgramCache]: Analyzing trace with hash 530917128, now seen corresponding path program 1 times [2023-11-25 00:03:15,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:15,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593169242] [2023-11-25 00:03:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:15,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:16,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-25 00:03:16,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182422711] [2023-11-25 00:03:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:16,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:16,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:16,075 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:16,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:03:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:17,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-25 00:03:17,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-25 00:03:17,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:17,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:17,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593169242] [2023-11-25 00:03:17,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-25 00:03:17,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182422711] [2023-11-25 00:03:17,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182422711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:17,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:03:17,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-25 00:03:17,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387374127] [2023-11-25 00:03:17,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-25 00:03:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:17,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-25 00:03:17,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-25 00:03:17,337 INFO L87 Difference]: Start difference. First operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-25 00:03:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:18,175 INFO L93 Difference]: Finished difference Result 488 states and 698 transitions. [2023-11-25 00:03:18,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-25 00:03:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 127 [2023-11-25 00:03:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:18,203 INFO L225 Difference]: With dead ends: 488 [2023-11-25 00:03:18,204 INFO L226 Difference]: Without dead ends: 259 [2023-11-25 00:03:18,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:03:18,231 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:18,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1200 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-25 00:03:18,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-11-25 00:03:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-11-25 00:03:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 145 states have internal predecessors, (170), 87 states have call successors, (87), 27 states have call predecessors, (87), 28 states have return successors, (86), 86 states have call predecessors, (86), 85 states have call successors, (86) [2023-11-25 00:03:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 343 transitions. [2023-11-25 00:03:18,349 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 343 transitions. Word has length 127 [2023-11-25 00:03:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:18,351 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 343 transitions. [2023-11-25 00:03:18,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-25 00:03:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 343 transitions. [2023-11-25 00:03:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-25 00:03:18,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:18,356 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:18,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:18,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-25 00:03:18,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:18,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash 953046530, now seen corresponding path program 1 times [2023-11-25 00:03:18,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:18,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516053631] [2023-11-25 00:03:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:18,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-11-25 00:03:21,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:21,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516053631] [2023-11-25 00:03:21,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516053631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:21,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897920037] [2023-11-25 00:03:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:21,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:21,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-25 00:03:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:22,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 2609 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-25 00:03:22,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-25 00:03:22,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:22,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897920037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:22,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:22,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-11-25 00:03:22,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783824064] [2023-11-25 00:03:22,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:22,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:03:22,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:22,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:03:22,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:03:22,830 INFO L87 Difference]: Start difference. First operand 259 states and 343 transitions. Second operand has 6 states, 3 states have (on average 17.666666666666668) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-11-25 00:03:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:03:24,142 INFO L93 Difference]: Finished difference Result 471 states and 633 transitions. [2023-11-25 00:03:24,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:03:24,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 17.666666666666668) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 131 [2023-11-25 00:03:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:03:24,149 INFO L225 Difference]: With dead ends: 471 [2023-11-25 00:03:24,149 INFO L226 Difference]: Without dead ends: 262 [2023-11-25 00:03:24,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:03:24,153 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 0 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:03:24,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1342 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-25 00:03:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-25 00:03:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2023-11-25 00:03:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 144 states have (on average 1.1875) internal successors, (171), 147 states have internal predecessors, (171), 87 states have call successors, (87), 27 states have call predecessors, (87), 29 states have return successors, (91), 86 states have call predecessors, (91), 85 states have call successors, (91) [2023-11-25 00:03:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 349 transitions. [2023-11-25 00:03:24,189 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 349 transitions. Word has length 131 [2023-11-25 00:03:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:03:24,190 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 349 transitions. [2023-11-25 00:03:24,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 17.666666666666668) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-11-25 00:03:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 349 transitions. [2023-11-25 00:03:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-25 00:03:24,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:03:24,195 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:03:24,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-25 00:03:24,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:24,409 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:03:24,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:03:24,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1193812291, now seen corresponding path program 1 times [2023-11-25 00:03:24,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:03:24,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035891375] [2023-11-25 00:03:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:24,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:03:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-11-25 00:03:26,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:03:26,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035891375] [2023-11-25 00:03:26,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035891375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:03:26,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965241939] [2023-11-25 00:03:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:03:26,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:03:26,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:03:26,413 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:03:26,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29660f0b-223e-4b44-a9a6-d14e77e0fe46/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-25 00:03:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:03:27,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-25 00:03:27,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:03:27,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-25 00:03:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-11-25 00:03:28,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:03:28,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965241939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:03:28,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-25 00:03:28,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2023-11-25 00:03:28,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970108442] [2023-11-25 00:03:28,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:03:28,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-25 00:03:28,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:03:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-25 00:03:28,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-11-25 00:03:28,096 INFO L87 Difference]: Start difference. First operand 261 states and 349 transitions. Second operand has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2023-11-25 00:03:33,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-25 00:03:35,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:37,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:39,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:41,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:43,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:46,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:48,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:50,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:52,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:54,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:03:58,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-25 00:04:00,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]