./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness_negated.i --full-output --architecture 64bit


--------------------------------------------------------------------------------


Checking for ERROR reachability
Using default analysis
Version 30e01a73
Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) )

 --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 153b65773966546d8fd416fac373e8e3e127696e78fd1e5e636cc0e37a9471f2
--- Real Ultimate output ---
This is Ultimate 0.2.3-dev-30e01a7
[2023-11-23 20:37:16,492 INFO  L188        SettingsManager]: Resetting all preferences to default values...
[2023-11-23 20:37:16,643 INFO  L114        SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf
[2023-11-23 20:37:16,656 WARN  L101        SettingsManager]: Preference file contains the following unknown settings:
[2023-11-23 20:37:16,657 WARN  L103        SettingsManager]:   * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2023-11-23 20:37:16,717 INFO  L130        SettingsManager]: Preferences different from defaults after loading the file:
[2023-11-23 20:37:16,718 INFO  L151        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-11-23 20:37:16,718 INFO  L153        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-11-23 20:37:16,720 INFO  L151        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-11-23 20:37:16,728 INFO  L153        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-11-23 20:37:16,729 INFO  L153        SettingsManager]:  * User list type=DISABLED
[2023-11-23 20:37:16,729 INFO  L151        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2023-11-23 20:37:16,730 INFO  L153        SettingsManager]:  * Explicit value domain=true
[2023-11-23 20:37:16,732 INFO  L153        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2023-11-23 20:37:16,733 INFO  L153        SettingsManager]:  * Octagon Domain=false
[2023-11-23 20:37:16,733 INFO  L153        SettingsManager]:  * Abstract domain=CompoundDomain
[2023-11-23 20:37:16,734 INFO  L153        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2023-11-23 20:37:16,735 INFO  L153        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2023-11-23 20:37:16,735 INFO  L153        SettingsManager]:  * Interval Domain=false
[2023-11-23 20:37:16,736 INFO  L151        SettingsManager]: Preferences of Sifa differ from their defaults:
[2023-11-23 20:37:16,736 INFO  L153        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2023-11-23 20:37:16,737 INFO  L153        SettingsManager]:  * Simplification Technique=POLY_PAC
[2023-11-23 20:37:16,739 INFO  L151        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-11-23 20:37:16,739 INFO  L153        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-11-23 20:37:16,742 INFO  L153        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-11-23 20:37:16,743 INFO  L153        SettingsManager]:  * Check division by zero=IGNORE
[2023-11-23 20:37:16,743 INFO  L153        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-11-23 20:37:16,744 INFO  L153        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-11-23 20:37:16,744 INFO  L153        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-11-23 20:37:16,745 INFO  L153        SettingsManager]:  * Check if freed pointer was valid=false
[2023-11-23 20:37:16,746 INFO  L153        SettingsManager]:  * Use constant arrays=true
[2023-11-23 20:37:16,747 INFO  L151        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-11-23 20:37:16,747 INFO  L153        SettingsManager]:  * Only consider context switches at boundaries of atomic blocks=true
[2023-11-23 20:37:16,747 INFO  L153        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-11-23 20:37:16,748 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-23 20:37:16,748 INFO  L151        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-11-23 20:37:16,749 INFO  L153        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-11-23 20:37:16,750 INFO  L153        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopHeads
[2023-11-23 20:37:16,750 INFO  L153        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2023-11-23 20:37:16,750 INFO  L153        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-11-23 20:37:16,751 INFO  L153        SettingsManager]:  * Apply one-shot large block encoding in concurrent analysis=false
[2023-11-23 20:37:16,751 INFO  L153        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-11-23 20:37:16,752 INFO  L153        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2023-11-23 20:37:16,752 INFO  L153        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-11-23 20:37:16,753 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_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )


Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 153b65773966546d8fd416fac373e8e3e127696e78fd1e5e636cc0e37a9471f2
[2023-11-23 20:37:17,062 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-11-23 20:37:17,109 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-11-23 20:37:17,115 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-11-23 20:37:17,117 INFO  L270        PluginConnector]: Initializing CDTParser...
[2023-11-23 20:37:17,117 INFO  L274        PluginConnector]: CDTParser initialized
[2023-11-23 20:37:17,119 INFO  L431   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness_negated.i
[2023-11-23 20:37:20,405 INFO  L533              CDTParser]: Created temporary CDT project at NULL
[2023-11-23 20:37:21,030 INFO  L384              CDTParser]: Found 1 translation units.
[2023-11-23 20:37:21,032 INFO  L180              CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness_negated.i
[2023-11-23 20:37:21,079 INFO  L427              CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/data/7a6a773ca/fac84ac9ebe04687bc49358cc48a5099/FLAGa4d7336fa
[2023-11-23 20:37:21,098 INFO  L435              CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/data/7a6a773ca/fac84ac9ebe04687bc49358cc48a5099
[2023-11-23 20:37:21,106 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-11-23 20:37:21,108 INFO  L133        ToolchainWalker]: Walking toolchain with 6 elements.
[2023-11-23 20:37:21,110 INFO  L112        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-11-23 20:37:21,110 INFO  L270        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-11-23 20:37:21,116 INFO  L274        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-11-23 20:37:21,117 INFO  L184        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:21" (1/1) ...
[2023-11-23 20:37:21,118 INFO  L204        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168237d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:21, skipping insertion in model container
[2023-11-23 20:37:21,119 INFO  L184        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:21" (1/1) ...
[2023-11-23 20:37:21,265 INFO  L177         MainTranslator]: Built tables and reachable declarations
[2023-11-23 20:37:21,645 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_d23eeced-2a9e-4b88-95b5-f4d910b81d95/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness_negated.i[4494,4507]
[2023-11-23 20:37:21,656 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_d23eeced-2a9e-4b88-95b5-f4d910b81d95/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness_negated.i[4554,4567]
[2023-11-23 20:37:23,001 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,003 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,004 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,005 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,006 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,053 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,054 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,056 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,062 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,074 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,078 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,078 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,079 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:23,687 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_load_n
[2023-11-23 20:37:23,702 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_store_n
[2023-11-23 20:37:23,704 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_exchange_n
[2023-11-23 20:37:23,705 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n
[2023-11-23 20:37:23,707 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_add
[2023-11-23 20:37:23,711 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_sub
[2023-11-23 20:37:23,712 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_or
[2023-11-23 20:37:23,713 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_and
[2023-11-23 20:37:23,714 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_xor
[2023-11-23 20:37:23,715 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_thread_fence
[2023-11-23 20:37:24,396 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,397 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,433 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,435 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,444 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,445 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,475 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,477 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,478 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,478 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,479 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,479 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,480 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,546 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-23 20:37:24,609 INFO  L202         MainTranslator]: Completed pre-run
[2023-11-23 20:37:24,636 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_d23eeced-2a9e-4b88-95b5-f4d910b81d95/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness_negated.i[4494,4507]
[2023-11-23 20:37:24,639 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_d23eeced-2a9e-4b88-95b5-f4d910b81d95/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness_negated.i[4554,4567]
[2023-11-23 20:37:24,714 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,715 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,717 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,717 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,718 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,731 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,731 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,733 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,733 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,735 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,736 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,737 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,737 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:24,783 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_load_n
[2023-11-23 20:37:24,784 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_store_n
[2023-11-23 20:37:24,785 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_exchange_n
[2023-11-23 20:37:24,786 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n
[2023-11-23 20:37:24,787 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_add
[2023-11-23 20:37:24,789 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_sub
[2023-11-23 20:37:24,790 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_or
[2023-11-23 20:37:24,791 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_and
[2023-11-23 20:37:24,792 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_fetch_xor
[2023-11-23 20:37:24,794 WARN  L635        FunctionHandler]: implicit declaration of function __atomic_thread_fence
[2023-11-23 20:37:24,859 WARN  L75    lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__(""
                         :




                         : "r"(pBuf)




                         : "memory"); [7526-7537]
[2023-11-23 20:37:25,051 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,052 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,063 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,064 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,068 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,069 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,086 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,087 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,087 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,089 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,089 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,090 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,090 WARN  L1590              CHandler]: Possible shadowing of function index
[2023-11-23 20:37:25,126 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-11-23 20:37:25,454 WARN  L675               CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,454 WARN  L675               CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,455 WARN  L675               CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,455 WARN  L675               CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,455 WARN  L675               CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,455 WARN  L675               CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,455 WARN  L675               CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,455 WARN  L675               CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,456 WARN  L675               CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,456 WARN  L675               CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,456 WARN  L675               CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,456 WARN  L675               CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,456 WARN  L675               CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,456 WARN  L675               CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,457 WARN  L675               CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,457 WARN  L675               CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,457 WARN  L675               CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,457 WARN  L675               CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler.
[2023-11-23 20:37:25,465 INFO  L206         MainTranslator]: Completed translation
[2023-11-23 20:37:25,466 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25 WrapperNode
[2023-11-23 20:37:25,466 INFO  L131        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-11-23 20:37:25,467 INFO  L112        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2023-11-23 20:37:25,468 INFO  L270        PluginConnector]: Initializing Boogie Procedure Inliner...
[2023-11-23 20:37:25,468 INFO  L274        PluginConnector]: Boogie Procedure Inliner initialized
[2023-11-23 20:37:25,476 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,640 INFO  L184        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,743 INFO  L138                Inliner]: procedures = 772, calls = 2461, calls flagged for inlining = 66, calls inlined = 11, statements flattened = 749
[2023-11-23 20:37:25,745 INFO  L131        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2023-11-23 20:37:25,746 INFO  L112        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-11-23 20:37:25,746 INFO  L270        PluginConnector]: Initializing Boogie Preprocessor...
[2023-11-23 20:37:25,746 INFO  L274        PluginConnector]: Boogie Preprocessor initialized
[2023-11-23 20:37:25,757 INFO  L184        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,757 INFO  L184        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,774 INFO  L184        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,774 INFO  L184        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,840 INFO  L184        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,846 INFO  L184        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,855 INFO  L184        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,861 INFO  L184        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,874 INFO  L131        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-11-23 20:37:25,875 INFO  L112        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-11-23 20:37:25,875 INFO  L270        PluginConnector]: Initializing RCFGBuilder...
[2023-11-23 20:37:25,875 INFO  L274        PluginConnector]: RCFGBuilder initialized
[2023-11-23 20:37:25,876 INFO  L184        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (1/1) ...
[2023-11-23 20:37:25,883 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-11-23 20:37:25,898 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3
[2023-11-23 20:37:25,915 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-11-23 20:37:25,949 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-11-23 20:37:25,966 INFO  L130     BoogieDeclarations]: Found specification of procedure read~real
[2023-11-23 20:37:25,966 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_bool
[2023-11-23 20:37:25,966 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_bool
[2023-11-23 20:37:25,967 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-11-23 20:37:25,968 INFO  L130     BoogieDeclarations]: Found specification of procedure aws_raise_error
[2023-11-23 20:37:25,968 INFO  L138     BoogieDeclarations]: Found implementation of procedure aws_raise_error
[2023-11-23 20:37:25,968 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-11-23 20:37:25,968 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2023-11-23 20:37:25,968 INFO  L130     BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid
[2023-11-23 20:37:25,968 INFO  L138     BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid
[2023-11-23 20:37:25,969 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2023-11-23 20:37:25,969 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-11-23 20:37:25,969 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2023-11-23 20:37:25,969 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-11-23 20:37:25,969 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-11-23 20:37:25,970 INFO  L130     BoogieDeclarations]: Found specification of procedure bounded_malloc
[2023-11-23 20:37:25,970 INFO  L138     BoogieDeclarations]: Found implementation of procedure bounded_malloc
[2023-11-23 20:37:25,970 INFO  L130     BoogieDeclarations]: Found specification of procedure aws_mul_size_checked
[2023-11-23 20:37:25,970 INFO  L138     BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked
[2023-11-23 20:37:25,970 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset
[2023-11-23 20:37:25,971 INFO  L138     BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset
[2023-11-23 20:37:25,971 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2023-11-23 20:37:25,971 INFO  L130     BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus
[2023-11-23 20:37:25,971 INFO  L138     BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus
[2023-11-23 20:37:25,971 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2023-11-23 20:37:25,971 INFO  L130     BoogieDeclarations]: Found specification of procedure nondet_uint64_t
[2023-11-23 20:37:25,972 INFO  L138     BoogieDeclarations]: Found implementation of procedure nondet_uint64_t
[2023-11-23 20:37:25,972 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-11-23 20:37:25,972 INFO  L130     BoogieDeclarations]: Found specification of procedure aws_is_power_of_two
[2023-11-23 20:37:25,972 INFO  L138     BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two
[2023-11-23 20:37:25,972 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-11-23 20:37:25,972 INFO  L130     BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes
[2023-11-23 20:37:25,972 INFO  L138     BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes
[2023-11-23 20:37:25,973 INFO  L130     BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID
[2023-11-23 20:37:25,973 INFO  L138     BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID
[2023-11-23 20:37:25,973 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2023-11-23 20:37:25,973 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2023-11-23 20:37:25,973 INFO  L130     BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid
[2023-11-23 20:37:25,974 INFO  L138     BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid
[2023-11-23 20:37:25,974 INFO  L130     BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid
[2023-11-23 20:37:25,974 INFO  L138     BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid
[2023-11-23 20:37:25,974 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$
[2023-11-23 20:37:25,974 INFO  L130     BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult
[2023-11-23 20:37:25,975 INFO  L138     BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult
[2023-11-23 20:37:25,975 INFO  L130     BoogieDeclarations]: Found specification of procedure aws_add_size_checked
[2023-11-23 20:37:25,976 INFO  L138     BoogieDeclarations]: Found implementation of procedure aws_add_size_checked
[2023-11-23 20:37:25,976 INFO  L130     BoogieDeclarations]: Found specification of procedure s_remove_entry
[2023-11-23 20:37:25,976 INFO  L138     BoogieDeclarations]: Found implementation of procedure s_remove_entry
[2023-11-23 20:37:25,976 INFO  L130     BoogieDeclarations]: Found specification of procedure aws_hash_iter_delete
[2023-11-23 20:37:25,976 INFO  L138     BoogieDeclarations]: Found implementation of procedure aws_hash_iter_delete
[2023-11-23 20:37:25,976 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-11-23 20:37:26,417 INFO  L241             CfgBuilder]: Building ICFG
[2023-11-23 20:37:26,420 INFO  L267             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-11-23 20:37:26,615 INFO  L775   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true;
[2023-11-23 20:37:26,615 INFO  L775   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true;
[2023-11-23 20:37:27,550 INFO  L282             CfgBuilder]: Performing block encoding
[2023-11-23 20:37:27,968 INFO  L304             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-11-23 20:37:27,968 INFO  L309             CfgBuilder]: Removed 7 assume(true) statements.
[2023-11-23 20:37:27,970 INFO  L201        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:27 BoogieIcfgContainer
[2023-11-23 20:37:27,971 INFO  L131        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-11-23 20:37:27,975 INFO  L112        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-11-23 20:37:27,976 INFO  L270        PluginConnector]: Initializing TraceAbstraction...
[2023-11-23 20:37:27,979 INFO  L274        PluginConnector]: TraceAbstraction initialized
[2023-11-23 20:37:27,980 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:21" (1/3) ...
[2023-11-23 20:37:27,989 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1504860a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:27, skipping insertion in model container
[2023-11-23 20:37:27,989 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:25" (2/3) ...
[2023-11-23 20:37:27,991 INFO  L204        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1504860a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:27, skipping insertion in model container
[2023-11-23 20:37:27,991 INFO  L184        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:27" (3/3) ...
[2023-11-23 20:37:27,994 INFO  L112   eAbstractionObserver]: Analyzing ICFG aws_hash_iter_delete_harness_negated.i
[2023-11-23 20:37:28,017 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-11-23 20:37:28,017 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-11-23 20:37:28,099 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-11-23 20:37:28,112 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;@77be2960, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2023-11-23 20:37:28,112 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-11-23 20:37:28,119 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54)
[2023-11-23 20:37:28,144 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 147
[2023-11-23 20:37:28,144 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-23 20:37:28,148 INFO  L195           NwaCegarLoop]: trace histogram [19, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-23 20:37:28,149 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-23 20:37:28,157 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-23 20:37:28,157 INFO  L85        PathProgramCache]: Analyzing trace with hash 1902186937, now seen corresponding path program 1 times
[2023-11-23 20:37:28,169 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-11-23 20:37:28,169 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541027823]
[2023-11-23 20:37:28,170 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-23 20:37:28,171 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-23 20:37:28,662 ERROR L246   FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic
[2023-11-23 20:37:28,663 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113604336]
[2023-11-23 20:37:28,663 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-23 20:37:28,664 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-23 20:37:28,664 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3
[2023-11-23 20:37:28,666 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-23 20:37:28,697 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-11-23 20:37:29,547 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-23 20:37:29,565 INFO  L262         TraceCheckSpWp]: Trace formula consists of 2489 conjuncts, 7 conjunts are in the unsatisfiable core
[2023-11-23 20:37:29,589 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-23 20:37:29,690 INFO  L134       CoverageAnalysis]: Checked inductivity of 352 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked.
[2023-11-23 20:37:29,691 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-23 20:37:29,691 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-11-23 20:37:29,691 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541027823]
[2023-11-23 20:37:29,692 WARN  L311   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT
[2023-11-23 20:37:29,692 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113604336]
[2023-11-23 20:37:29,693 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113604336] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-23 20:37:29,693 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-23 20:37:29,693 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2023-11-23 20:37:29,696 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646761228]
[2023-11-23 20:37:29,697 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-23 20:37:29,702 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-23 20:37:29,703 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-11-23 20:37:29,737 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-23 20:37:29,738 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2023-11-23 20:37:29,743 INFO  L87              Difference]: Start difference. First operand  has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Second operand  has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32)
[2023-11-23 20:37:30,411 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-23 20:37:30,412 INFO  L93              Difference]: Finished difference Result 304 states and 413 transitions.
[2023-11-23 20:37:30,413 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2023-11-23 20:37:30,415 INFO  L78                 Accepts]: Start accepts. Automaton has  has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 146
[2023-11-23 20:37:30,416 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-23 20:37:30,431 INFO  L225             Difference]: With dead ends: 304
[2023-11-23 20:37:30,431 INFO  L226             Difference]: Without dead ends: 169
[2023-11-23 20:37:30,440 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2023-11-23 20:37:30,450 INFO  L413           NwaCegarLoop]: 185 mSDtfsCounter, 1 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-11-23 20:37:30,451 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 736 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-11-23 20:37:30,471 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 169 states.
[2023-11-23 20:37:30,531 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169.
[2023-11-23 20:37:30,535 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 169 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 95 states have internal predecessors, (109), 54 states have call successors, (54), 19 states have call predecessors, (54), 20 states have return successors, (54), 54 states have call predecessors, (54), 53 states have call successors, (54)
[2023-11-23 20:37:30,538 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 217 transitions.
[2023-11-23 20:37:30,540 INFO  L78                 Accepts]: Start accepts. Automaton has 169 states and 217 transitions. Word has length 146
[2023-11-23 20:37:30,542 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-23 20:37:30,542 INFO  L495      AbstractCegarLoop]: Abstraction has 169 states and 217 transitions.
[2023-11-23 20:37:30,542 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32)
[2023-11-23 20:37:30,543 INFO  L276                IsEmpty]: Start isEmpty. Operand 169 states and 217 transitions.
[2023-11-23 20:37:30,559 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 151
[2023-11-23 20:37:30,559 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-23 20:37:30,559 INFO  L195           NwaCegarLoop]: trace histogram [19, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-23 20:37:30,594 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2023-11-23 20:37:30,782 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0
[2023-11-23 20:37:30,783 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-23 20:37:30,783 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-23 20:37:30,783 INFO  L85        PathProgramCache]: Analyzing trace with hash 1884336505, now seen corresponding path program 1 times
[2023-11-23 20:37:30,784 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-11-23 20:37:30,784 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498207201]
[2023-11-23 20:37:30,784 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-23 20:37:30,784 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-23 20:37:31,075 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-23 20:37:34,065 INFO  L134       CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked.
[2023-11-23 20:37:34,065 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-11-23 20:37:34,065 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498207201]
[2023-11-23 20:37:34,066 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498207201] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-23 20:37:34,066 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-11-23 20:37:34,066 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2023-11-23 20:37:34,066 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061711504]
[2023-11-23 20:37:34,067 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-23 20:37:34,071 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 8 states
[2023-11-23 20:37:34,071 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-11-23 20:37:34,074 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2023-11-23 20:37:34,074 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2023-11-23 20:37:34,074 INFO  L87              Difference]: Start difference. First operand 169 states and 217 transitions. Second operand  has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33)
[2023-11-23 20:37:34,981 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-23 20:37:34,982 INFO  L93              Difference]: Finished difference Result 290 states and 376 transitions.
[2023-11-23 20:37:34,982 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2023-11-23 20:37:34,983 INFO  L78                 Accepts]: Start accepts. Automaton has  has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33) Word has length 150
[2023-11-23 20:37:34,983 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-23 20:37:34,987 INFO  L225             Difference]: With dead ends: 290
[2023-11-23 20:37:34,988 INFO  L226             Difference]: Without dead ends: 171
[2023-11-23 20:37:34,989 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2023-11-23 20:37:34,990 INFO  L413           NwaCegarLoop]: 182 mSDtfsCounter, 6 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time
[2023-11-23 20:37:34,991 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 822 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time]
[2023-11-23 20:37:34,993 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 171 states.
[2023-11-23 20:37:35,011 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171.
[2023-11-23 20:37:35,012 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 171 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 97 states have internal predecessors, (110), 54 states have call successors, (54), 19 states have call predecessors, (54), 21 states have return successors, (55), 54 states have call predecessors, (55), 53 states have call successors, (55)
[2023-11-23 20:37:35,014 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions.
[2023-11-23 20:37:35,015 INFO  L78                 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 150
[2023-11-23 20:37:35,016 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-23 20:37:35,016 INFO  L495      AbstractCegarLoop]: Abstraction has 171 states and 219 transitions.
[2023-11-23 20:37:35,016 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 8 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (33), 4 states have call predecessors, (33), 4 states have call successors, (33)
[2023-11-23 20:37:35,017 INFO  L276                IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions.
[2023-11-23 20:37:35,019 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 157
[2023-11-23 20:37:35,019 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-23 20:37:35,020 INFO  L195           NwaCegarLoop]: trace histogram [19, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-23 20:37:35,020 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2023-11-23 20:37:35,020 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-23 20:37:35,021 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-23 20:37:35,021 INFO  L85        PathProgramCache]: Analyzing trace with hash -1265297240, now seen corresponding path program 1 times
[2023-11-23 20:37:35,021 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-11-23 20:37:35,022 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335660052]
[2023-11-23 20:37:35,022 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-23 20:37:35,022 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-23 20:37:35,144 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-23 20:37:37,042 INFO  L134       CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked.
[2023-11-23 20:37:37,042 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-11-23 20:37:37,043 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335660052]
[2023-11-23 20:37:37,043 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335660052] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-23 20:37:37,045 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510073647]
[2023-11-23 20:37:37,045 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-23 20:37:37,046 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-23 20:37:37,046 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3
[2023-11-23 20:37:37,050 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-23 20:37:37,069 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-11-23 20:37:37,784 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-23 20:37:37,799 INFO  L262         TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 49 conjunts are in the unsatisfiable core
[2023-11-23 20:37:37,820 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-23 20:37:38,036 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1
[2023-11-23 20:37:38,429 INFO  L134       CoverageAnalysis]: Checked inductivity of 360 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked.
[2023-11-23 20:37:38,429 INFO  L323         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2023-11-23 20:37:38,429 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [510073647] provided 1 perfect and 0 imperfect interpolant sequences
[2023-11-23 20:37:38,429 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2023-11-23 20:37:38,430 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18
[2023-11-23 20:37:38,430 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913424587]
[2023-11-23 20:37:38,430 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-23 20:37:38,431 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 12 states
[2023-11-23 20:37:38,431 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-11-23 20:37:38,433 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2023-11-23 20:37:38,434 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306
[2023-11-23 20:37:38,434 INFO  L87              Difference]: Start difference. First operand 171 states and 219 transitions. Second operand  has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34)
[2023-11-23 20:37:42,614 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]
[2023-11-23 20:37:44,758 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:37:46,823 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:37:48,935 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:37:50,969 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:37:53,137 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:37:55,911 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:37:57,957 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:38:00,125 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:38:02,234 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:38:04,357 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:38:06,403 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:38:08,680 WARN  L539   Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]
[2023-11-23 20:38:08,738 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-11-23 20:38:08,738 INFO  L93              Difference]: Finished difference Result 339 states and 427 transitions.
[2023-11-23 20:38:08,739 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2023-11-23 20:38:08,739 INFO  L78                 Accepts]: Start accepts. Automaton has  has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) Word has length 156
[2023-11-23 20:38:08,740 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-11-23 20:38:08,742 INFO  L225             Difference]: With dead ends: 339
[2023-11-23 20:38:08,742 INFO  L226             Difference]: Without dead ends: 211
[2023-11-23 20:38:08,744 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600
[2023-11-23 20:38:08,745 INFO  L413           NwaCegarLoop]: 185 mSDtfsCounter, 63 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 20 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1573 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.0s IncrementalHoareTripleChecker+Time
[2023-11-23 20:38:08,746 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1573 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 821 Invalid, 13 Unknown, 0 Unchecked, 30.0s Time]
[2023-11-23 20:38:08,747 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 211 states.
[2023-11-23 20:38:08,772 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208.
[2023-11-23 20:38:08,773 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 208 states, 116 states have (on average 1.1379310344827587) internal successors, (132), 118 states have internal predecessors, (132), 62 states have call successors, (62), 27 states have call predecessors, (62), 29 states have return successors, (64), 62 states have call predecessors, (64), 61 states have call successors, (64)
[2023-11-23 20:38:08,775 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 258 transitions.
[2023-11-23 20:38:08,776 INFO  L78                 Accepts]: Start accepts. Automaton has 208 states and 258 transitions. Word has length 156
[2023-11-23 20:38:08,776 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-11-23 20:38:08,777 INFO  L495      AbstractCegarLoop]: Abstraction has 208 states and 258 transitions.
[2023-11-23 20:38:08,777 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34)
[2023-11-23 20:38:08,777 INFO  L276                IsEmpty]: Start isEmpty. Operand 208 states and 258 transitions.
[2023-11-23 20:38:08,780 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 161
[2023-11-23 20:38:08,780 INFO  L187           NwaCegarLoop]: Found error trace
[2023-11-23 20:38:08,780 INFO  L195           NwaCegarLoop]: trace histogram [19, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-11-23 20:38:08,813 INFO  L540       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-11-23 20:38:09,001 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-23 20:38:09,001 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-11-23 20:38:09,002 INFO  L160       PredicateUnifier]: Initialized classic predicate unifier
[2023-11-23 20:38:09,002 INFO  L85        PathProgramCache]: Analyzing trace with hash 2029443621, now seen corresponding path program 1 times
[2023-11-23 20:38:09,002 INFO  L118   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2023-11-23 20:38:09,002 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887756915]
[2023-11-23 20:38:09,003 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-23 20:38:09,003 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-11-23 20:38:09,214 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-23 20:38:10,153 INFO  L134       CoverageAnalysis]: Checked inductivity of 362 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked.
[2023-11-23 20:38:10,154 INFO  L136   FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace
[2023-11-23 20:38:10,154 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887756915]
[2023-11-23 20:38:10,154 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887756915] provided 0 perfect and 1 imperfect interpolant sequences
[2023-11-23 20:38:10,155 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021884932]
[2023-11-23 20:38:10,155 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-11-23 20:38:10,155 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-11-23 20:38:10,155 INFO  L189       MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3
[2023-11-23 20:38:10,157 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-11-23 20:38:10,185 INFO  L327       MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d23eeced-2a9e-4b88-95b5-f4d910b81d95/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-11-23 20:38:10,894 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-11-23 20:38:10,909 INFO  L262         TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 53 conjunts are in the unsatisfiable core
[2023-11-23 20:38:10,924 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-11-23 20:38:11,110 INFO  L378             Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1
[2023-11-23 20:38:11,887 INFO  L134       CoverageAnalysis]: Checked inductivity of 362 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked.
[2023-11-23 20:38:11,887 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-11-23 20:38:12,665 INFO  L134       CoverageAnalysis]: Checked inductivity of 362 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked.
[2023-11-23 20:38:12,666 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021884932] provided 1 perfect and 1 imperfect interpolant sequences
[2023-11-23 20:38:12,666 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences.
[2023-11-23 20:38:12,667 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 18] total 23
[2023-11-23 20:38:12,667 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250520359]
[2023-11-23 20:38:12,667 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-11-23 20:38:12,668 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 5 states
[2023-11-23 20:38:12,669 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2023-11-23 20:38:12,670 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2023-11-23 20:38:12,670 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506
[2023-11-23 20:38:12,670 INFO  L87              Difference]: Start difference. First operand 208 states and 258 transitions. Second operand  has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 1 states have call predecessors, (35), 1 states have call successors, (35)