./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 0e0057cc 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_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/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_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/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_15be882c-1ff5-4eee-a31d-b214a1f8702f/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_15be882c-1ff5-4eee-a31d-b214a1f8702f/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 1d3eb02e894c2acef7732d0e57c112cc2c197f8f03d7c13822f169fbed4dc5e5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:15:01,323 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:15:01,422 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:15:01,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:15:01,433 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:15:01,470 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:15:01,471 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:15:01,472 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:15:01,472 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:15:01,473 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:15:01,474 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:15:01,474 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:15:01,475 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:15:01,475 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:15:01,476 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:15:01,476 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:15:01,477 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:15:01,477 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:15:01,478 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:15:01,478 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:15:01,479 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:15:01,480 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:15:01,481 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:15:01,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:15:01,482 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:15:01,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:15:01,483 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:15:01,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:15:01,484 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:15:01,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:15:01,485 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:15:01,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:15:01,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:15:01,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:15:01,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:15:01,487 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:15:01,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:15:01,488 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:15:01,489 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:15:01,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:15:01,490 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:15:01,491 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:15:01,491 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:15:01,492 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:15:01,492 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_15be882c-1ff5-4eee-a31d-b214a1f8702f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d3eb02e894c2acef7732d0e57c112cc2c197f8f03d7c13822f169fbed4dc5e5 [2023-11-24 23:15:01,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:15:01,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:15:01,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:15:01,809 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:15:01,810 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:15:01,811 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i [2023-11-24 23:15:04,886 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:15:05,587 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:15:05,587 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i [2023-11-24 23:15:05,629 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/data/5e061f26d/d43922759fcb481793dc4170bbc862fa/FLAGe985d23af [2023-11-24 23:15:05,646 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/data/5e061f26d/d43922759fcb481793dc4170bbc862fa [2023-11-24 23:15:05,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:15:05,654 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:15:05,657 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:15:05,657 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:15:05,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:15:05,664 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:15:05" (1/1) ... [2023-11-24 23:15:05,665 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75d85dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:05, skipping insertion in model container [2023-11-24 23:15:05,665 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:15:05" (1/1) ... [2023-11-24 23:15:05,831 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:15:06,115 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_15be882c-1ff5-4eee-a31d-b214a1f8702f/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4504,4517] [2023-11-24 23:15:06,125 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_15be882c-1ff5-4eee-a31d-b214a1f8702f/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4564,4577] [2023-11-24 23:15:07,272 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,274 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,275 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,280 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,283 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,311 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,313 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,316 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,318 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,325 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,328 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,331 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,331 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:07,973 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:15:07,975 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:15:07,976 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:15:07,977 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:15:07,979 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:15:07,980 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:15:07,981 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:15:07,982 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:15:07,983 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:15:07,983 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:15:08,323 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,324 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,363 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,371 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,457 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,458 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,458 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,459 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,459 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,460 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,461 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,461 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,462 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,462 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,463 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,463 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,464 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,467 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,468 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,468 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,469 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,472 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,473 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,481 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,482 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,482 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:15:08,546 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:15:08,584 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_15be882c-1ff5-4eee-a31d-b214a1f8702f/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4504,4517] [2023-11-24 23:15:08,585 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_15be882c-1ff5-4eee-a31d-b214a1f8702f/sv-benchmarks/c/aws-c-common/aws_priority_queue_s_sift_down_harness.i[4564,4577] [2023-11-24 23:15:08,640 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,641 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,641 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,642 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,643 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,659 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,660 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,661 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,665 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,669 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,670 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,670 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,671 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,725 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:15:08,726 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:15:08,727 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:15:08,731 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:15:08,732 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:15:08,733 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:15:08,733 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:15:08,734 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:15:08,734 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:15:08,735 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:15:08,791 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,791 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,793 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,798 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,806 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7776-7787] [2023-11-24 23:15:08,846 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,847 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,847 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,847 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,848 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,848 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,849 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,849 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,850 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,850 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,850 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,851 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,851 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,852 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,853 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,853 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,853 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,859 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,860 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,871 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,872 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,873 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:15:08,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:15:09,206 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,206 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,206 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,207 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,207 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,207 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,207 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,208 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,208 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,209 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,209 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,209 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,209 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,209 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,210 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:15:09,218 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:15:09,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09 WrapperNode [2023-11-24 23:15:09,220 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:15:09,222 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:15:09,222 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:15:09,222 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:15:09,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,466 INFO L138 Inliner]: procedures = 696, calls = 1906, calls flagged for inlining = 59, calls inlined = 14, statements flattened = 845 [2023-11-24 23:15:09,467 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:15:09,467 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:15:09,467 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:15:09,468 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:15:09,477 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,493 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,561 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,580 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,641 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:15:09,642 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:15:09,642 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:15:09,642 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:15:09,643 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (1/1) ... [2023-11-24 23:15:09,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:15:09,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:09,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:15:09,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:15:09,747 INFO L130 BoogieDeclarations]: Found specification of procedure s_swap [2023-11-24 23:15:09,748 INFO L138 BoogieDeclarations]: Found implementation of procedure s_swap [2023-11-24 23:15:09,748 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-24 23:15:09,748 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-24 23:15:09,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:15:09,748 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-24 23:15:09,749 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-24 23:15:09,749 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-24 23:15:09,749 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-24 23:15:09,749 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-24 23:15:09,749 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-24 23:15:09,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:15:09,750 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-24 23:15:09,750 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-24 23:15:09,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:15:09,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:15:09,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:15:09,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:15:09,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:15:09,751 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2023-11-24 23:15:09,751 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2023-11-24 23:15:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:15:09,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:15:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-24 23:15:09,752 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-24 23:15:09,752 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2023-11-24 23:15:09,752 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2023-11-24 23:15:09,753 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-24 23:15:09,753 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-24 23:15:09,753 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-24 23:15:09,754 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-24 23:15:09,754 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_is_valid [2023-11-24 23:15:09,757 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_is_valid [2023-11-24 23:15:09,758 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-24 23:15:09,758 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-24 23:15:09,758 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:15:09,758 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:15:09,759 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2023-11-24 23:15:09,760 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2023-11-24 23:15:09,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:15:09,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:15:09,765 INFO L130 BoogieDeclarations]: Found specification of procedure s_sift_down [2023-11-24 23:15:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure s_sift_down [2023-11-24 23:15:09,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:15:09,765 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_get_at_ptr [2023-11-24 23:15:09,765 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_get_at_ptr [2023-11-24 23:15:09,765 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-24 23:15:09,766 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-24 23:15:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-24 23:15:09,766 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-24 23:15:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:15:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-24 23:15:09,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-24 23:15:09,766 INFO L130 BoogieDeclarations]: Found specification of procedure aws_priority_queue_backpointer_index_valid [2023-11-24 23:15:09,767 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_priority_queue_backpointer_index_valid [2023-11-24 23:15:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-24 23:15:09,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-24 23:15:09,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:15:10,183 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:15:10,189 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:15:11,382 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:15:11,734 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:15:11,735 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-24 23:15:11,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:15:11 BoogieIcfgContainer [2023-11-24 23:15:11,737 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:15:11,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:15:11,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:15:11,744 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:15:11,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:15:05" (1/3) ... [2023-11-24 23:15:11,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474d91a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:15:11, skipping insertion in model container [2023-11-24 23:15:11,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:15:09" (2/3) ... [2023-11-24 23:15:11,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474d91a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:15:11, skipping insertion in model container [2023-11-24 23:15:11,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:15:11" (3/3) ... [2023-11-24 23:15:11,748 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_priority_queue_s_sift_down_harness.i [2023-11-24 23:15:11,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:15:11,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:15:11,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:15:11,859 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;@4d31030d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:15:11,859 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:15:11,872 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) [2023-11-24 23:15:11,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-24 23:15:11,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:11,896 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] [2023-11-24 23:15:11,896 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:11,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:11,907 INFO L85 PathProgramCache]: Analyzing trace with hash -670789109, now seen corresponding path program 1 times [2023-11-24 23:15:11,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:11,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650501038] [2023-11-24 23:15:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:11,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-11-24 23:15:13,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:13,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650501038] [2023-11-24 23:15:13,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650501038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878018720] [2023-11-24 23:15:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:13,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:13,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:13,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:15:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:13,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 2286 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 23:15:13,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-24 23:15:14,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:15:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878018720] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:14,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:15:14,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-24 23:15:14,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128379028] [2023-11-24 23:15:14,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:14,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:15:14,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:14,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:15:14,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:15:14,143 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) [2023-11-24 23:15:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:14,971 INFO L93 Difference]: Finished difference Result 498 states and 725 transitions. [2023-11-24 23:15:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:14,974 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 [2023-11-24 23:15:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:14,988 INFO L225 Difference]: With dead ends: 498 [2023-11-24 23:15:14,988 INFO L226 Difference]: Without dead ends: 269 [2023-11-24 23:15:14,996 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 [2023-11-24 23:15:14,999 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 34 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:15,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1190 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:15:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2023-11-24 23:15:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2023-11-24 23:15:15,077 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) [2023-11-24 23:15:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 375 transitions. [2023-11-24 23:15:15,085 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 375 transitions. Word has length 121 [2023-11-24 23:15:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:15,086 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 375 transitions. [2023-11-24 23:15:15,086 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) [2023-11-24 23:15:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 375 transitions. [2023-11-24 23:15:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-24 23:15:15,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:15,091 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] [2023-11-24 23:15:15,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 23:15:15,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:15,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:15,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1753230441, now seen corresponding path program 1 times [2023-11-24 23:15:15,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:15,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831493103] [2023-11-24 23:15:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:15,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2023-11-24 23:15:16,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:16,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831493103] [2023-11-24 23:15:16,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831493103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:16,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588118046] [2023-11-24 23:15:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:16,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:16,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:16,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:16,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:15:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:16,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 2336 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:15:16,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-24 23:15:16,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:15:16,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588118046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:16,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:15:16,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-24 23:15:16,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990844796] [2023-11-24 23:15:16,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:16,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 23:15:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 23:15:16,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:15:16,784 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) [2023-11-24 23:15:17,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:17,770 INFO L93 Difference]: Finished difference Result 509 states and 724 transitions. [2023-11-24 23:15:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:15:17,772 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 [2023-11-24 23:15:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:17,777 INFO L225 Difference]: With dead ends: 509 [2023-11-24 23:15:17,777 INFO L226 Difference]: Without dead ends: 282 [2023-11-24 23:15:17,779 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 [2023-11-24 23:15:17,787 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 48 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:17,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1744 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 23:15:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-11-24 23:15:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2023-11-24 23:15:17,861 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) [2023-11-24 23:15:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 400 transitions. [2023-11-24 23:15:17,865 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 400 transitions. Word has length 129 [2023-11-24 23:15:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:17,866 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 400 transitions. [2023-11-24 23:15:17,867 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) [2023-11-24 23:15:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 400 transitions. [2023-11-24 23:15:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-24 23:15:17,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:17,871 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] [2023-11-24 23:15:17,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:15:18,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:18,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:18,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:18,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1797104726, now seen corresponding path program 1 times [2023-11-24 23:15:18,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:18,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087813523] [2023-11-24 23:15:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:18,220 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:15:18,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709519814] [2023-11-24 23:15:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:18,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:18,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:18,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:18,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:15:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:18,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 2468 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:15:18,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-24 23:15:18,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:15:18,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:18,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087813523] [2023-11-24 23:15:18,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:15:18,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709519814] [2023-11-24 23:15:18,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709519814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:18,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:18,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 23:15:18,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658661770] [2023-11-24 23:15:18,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:18,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 23:15:18,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 23:15:18,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:15:18,972 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) [2023-11-24 23:15:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:19,603 INFO L93 Difference]: Finished difference Result 524 states and 756 transitions. [2023-11-24 23:15:19,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 23:15:19,604 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 [2023-11-24 23:15:19,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:19,607 INFO L225 Difference]: With dead ends: 524 [2023-11-24 23:15:19,608 INFO L226 Difference]: Without dead ends: 286 [2023-11-24 23:15:19,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-24 23:15:19,610 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, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:19,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 1476 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:15:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-24 23:15:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2023-11-24 23:15:19,648 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) [2023-11-24 23:15:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 400 transitions. [2023-11-24 23:15:19,653 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 400 transitions. Word has length 138 [2023-11-24 23:15:19,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:19,657 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 400 transitions. [2023-11-24 23:15:19,657 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) [2023-11-24 23:15:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 400 transitions. [2023-11-24 23:15:19,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-24 23:15:19,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:19,667 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] [2023-11-24 23:15:19,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:15:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:19,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:19,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash 371580142, now seen corresponding path program 1 times [2023-11-24 23:15:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839637812] [2023-11-24 23:15:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:19,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:19,987 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:15:19,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433272447] [2023-11-24 23:15:19,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:19,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:19,989 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:20,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:15:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:20,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 23:15:20,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-24 23:15:20,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:15:20,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:20,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839637812] [2023-11-24 23:15:20,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:15:20,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433272447] [2023-11-24 23:15:20,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433272447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:20,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:20,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:15:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559263012] [2023-11-24 23:15:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:20,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:15:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:15:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:15:20,776 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) [2023-11-24 23:15:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:21,878 INFO L93 Difference]: Finished difference Result 526 states and 757 transitions. [2023-11-24 23:15:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 23:15:21,879 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 [2023-11-24 23:15:21,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:21,883 INFO L225 Difference]: With dead ends: 526 [2023-11-24 23:15:21,883 INFO L226 Difference]: Without dead ends: 288 [2023-11-24 23:15:21,885 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 [2023-11-24 23:15:21,886 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 64 mSDsluCounter, 1695 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:21,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1993 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 23:15:21,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-11-24 23:15:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 280. [2023-11-24 23:15:21,913 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) [2023-11-24 23:15:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 400 transitions. [2023-11-24 23:15:21,917 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 400 transitions. Word has length 146 [2023-11-24 23:15:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:21,918 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 400 transitions. [2023-11-24 23:15:21,919 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) [2023-11-24 23:15:21,919 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 400 transitions. [2023-11-24 23:15:21,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-24 23:15:21,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:21,923 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] [2023-11-24 23:15:21,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:15:22,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:22,141 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:22,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1493400707, now seen corresponding path program 2 times [2023-11-24 23:15:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130618188] [2023-11-24 23:15:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:22,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:22,263 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:15:22,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195362199] [2023-11-24 23:15:22,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:15:22,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:22,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:22,265 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:22,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:15:22,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 23:15:22,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:15:22,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 23:15:22,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-24 23:15:22,916 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:15:22,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:22,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130618188] [2023-11-24 23:15:22,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:15:22,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195362199] [2023-11-24 23:15:22,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195362199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:22,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:22,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:15:22,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556815771] [2023-11-24 23:15:22,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:22,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:15:22,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:22,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:15:22,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:15:22,920 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) [2023-11-24 23:15:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:23,509 INFO L93 Difference]: Finished difference Result 484 states and 706 transitions. [2023-11-24 23:15:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:23,510 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 [2023-11-24 23:15:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:23,514 INFO L225 Difference]: With dead ends: 484 [2023-11-24 23:15:23,514 INFO L226 Difference]: Without dead ends: 280 [2023-11-24 23:15:23,516 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 [2023-11-24 23:15:23,517 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 0 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:23,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1205 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:15:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-24 23:15:23,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2023-11-24 23:15:23,536 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) [2023-11-24 23:15:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 399 transitions. [2023-11-24 23:15:23,539 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 399 transitions. Word has length 155 [2023-11-24 23:15:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:23,540 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 399 transitions. [2023-11-24 23:15:23,541 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) [2023-11-24 23:15:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 399 transitions. [2023-11-24 23:15:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-24 23:15:23,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:23,544 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] [2023-11-24 23:15:23,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 23:15:23,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:23,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:23,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash -499179154, now seen corresponding path program 3 times [2023-11-24 23:15:23,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:23,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318514962] [2023-11-24 23:15:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:23,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:23,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:15:23,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952250278] [2023-11-24 23:15:23,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 23:15:23,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:23,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:23,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:23,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15be882c-1ff5-4eee-a31d-b214a1f8702f/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 23:15:24,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 23:15:24,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:15:24,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 23:15:24,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-24 23:15:24,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:15:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-24 23:15:24,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:24,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318514962] [2023-11-24 23:15:24,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:15:24,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952250278] [2023-11-24 23:15:24,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952250278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:15:24,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241919447] [2023-11-24 23:15:24,953 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2023-11-24 23:15:24,953 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:15:24,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:15:24,963 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:15:24,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs