./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.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_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/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_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/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_2173e84e-4f7b-462d-9c62-52f41b7f14f3/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 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:31:10,534 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:31:10,658 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:31:10,665 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:31:10,666 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:31:10,710 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:31:10,711 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:31:10,711 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:31:10,712 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:31:10,717 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:31:10,718 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:31:10,719 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:31:10,720 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:31:10,721 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:31:10,722 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:31:10,722 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:31:10,723 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:31:10,723 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:31:10,724 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:31:10,724 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:31:10,725 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:31:10,725 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:31:10,726 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:31:10,726 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:31:10,727 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:31:10,727 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:31:10,728 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:31:10,728 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:31:10,728 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:31:10,729 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:31:10,729 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:31:10,730 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:31:10,730 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:31:10,730 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:31:10,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:31:10,730 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:31:10,731 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:31:10,731 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:31:10,731 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:31:10,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:31:10,731 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:31:10,738 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:31:10,739 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:31:10,739 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:31:10,739 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_2173e84e-4f7b-462d-9c62-52f41b7f14f3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ba879a31f48d1f1f7d1dc7f928910bfb7ed0629fadb04ed483f94e60bfd5ef0 [2023-11-23 20:31:10,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:31:11,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:31:11,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:31:11,027 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:31:11,028 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:31:11,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2023-11-23 20:31:14,109 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:31:14,731 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:31:14,732 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i [2023-11-23 20:31:14,780 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/data/0cb0a3acf/969d75a95e624aa389c4f138db109076/FLAG51fdb3d86 [2023-11-23 20:31:14,801 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/data/0cb0a3acf/969d75a95e624aa389c4f138db109076 [2023-11-23 20:31:14,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:31:14,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:31:14,820 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:31:14,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:31:14,827 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:31:14,828 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:14" (1/1) ... [2023-11-23 20:31:14,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@361a97d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:14, skipping insertion in model container [2023-11-23 20:31:14,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:14" (1/1) ... [2023-11-23 20:31:14,957 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:31:15,286 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_2173e84e-4f7b-462d-9c62-52f41b7f14f3/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2023-11-23 20:31:15,295 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_2173e84e-4f7b-462d-9c62-52f41b7f14f3/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2023-11-23 20:31:16,518 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,527 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,527 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,528 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,532 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,557 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,558 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,563 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,570 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,572 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,576 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:16,578 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,041 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:31:17,043 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:31:17,045 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:31:17,046 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:31:17,048 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:31:17,049 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:31:17,050 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:31:17,051 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:31:17,052 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:31:17,053 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:31:17,229 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,249 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:31:17,365 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:31:17,391 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_2173e84e-4f7b-462d-9c62-52f41b7f14f3/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4497,4510] [2023-11-23 20:31:17,394 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_2173e84e-4f7b-462d-9c62-52f41b7f14f3/sv-benchmarks/c/aws-c-common/aws_array_list_clean_up_harness.i[4557,4570] [2023-11-23 20:31:17,492 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,492 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,493 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,494 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,502 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,515 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,516 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,517 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,518 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,519 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,519 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,577 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:31:17,578 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:31:17,580 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:31:17,582 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:31:17,584 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:31:17,585 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:31:17,585 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:31:17,586 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:31:17,586 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:31:17,587 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:31:17,613 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,619 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:31:17,626 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7529-7540] [2023-11-23 20:31:17,651 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:31:17,876 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,876 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,876 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,876 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,877 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,877 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,877 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,877 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,877 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,877 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,878 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,878 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,878 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,878 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,878 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:31:17,886 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:31:17,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17 WrapperNode [2023-11-23 20:31:17,887 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:31:17,888 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:31:17,889 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:31:17,889 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:31:17,896 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:17,989 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,079 INFO L138 Inliner]: procedures = 689, calls = 1554, calls flagged for inlining = 48, calls inlined = 7, statements flattened = 578 [2023-11-23 20:31:18,080 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:31:18,081 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:31:18,081 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:31:18,081 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:31:18,098 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,138 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,191 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,210 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,232 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,246 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:31:18,255 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:31:18,255 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:31:18,255 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:31:18,256 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (1/1) ... [2023-11-23 20:31:18,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:31:18,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:18,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:31:18,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:31:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2023-11-23 20:31:18,370 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2023-11-23 20:31:18,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:31:18,371 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-23 20:31:18,371 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-23 20:31:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 20:31:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 20:31:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 20:31:18,372 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 20:31:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:31:18,372 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 20:31:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 20:31:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:31:18,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:31:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:31:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:31:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:31:18,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:31:18,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:31:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 20:31:18,375 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 20:31:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 20:31:18,375 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 20:31:18,375 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-23 20:31:18,375 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-23 20:31:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 20:31:18,376 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 20:31:18,376 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:31:18,376 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:31:18,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:31:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:31:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:31:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 20:31:18,378 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 20:31:18,378 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 20:31:18,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 20:31:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:31:18,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:31:18,711 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:31:18,714 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:31:19,629 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:31:19,849 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:31:19,849 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 20:31:19,851 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:19 BoogieIcfgContainer [2023-11-23 20:31:19,851 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:31:19,855 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:31:19,855 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:31:19,859 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:31:19,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:31:14" (1/3) ... [2023-11-23 20:31:19,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537c213a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:19, skipping insertion in model container [2023-11-23 20:31:19,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:17" (2/3) ... [2023-11-23 20:31:19,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537c213a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:19, skipping insertion in model container [2023-11-23 20:31:19,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:19" (3/3) ... [2023-11-23 20:31:19,865 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_clean_up_harness.i [2023-11-23 20:31:19,885 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:31:19,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:31:19,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:31:19,957 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;@149a2a86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:31:19,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:31:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-11-23 20:31:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 20:31:19,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:19,978 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-23 20:31:19,998 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:20,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -46536477, now seen corresponding path program 1 times [2023-11-23 20:31:20,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:20,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651263788] [2023-11-23 20:31:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:20,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:31:20,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651263788] [2023-11-23 20:31:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651263788] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:20,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:20,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:31:20,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835255967] [2023-11-23 20:31:20,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:20,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 20:31:20,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:20,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 20:31:20,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:31:20,676 INFO L87 Difference]: Start difference. First operand has 87 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 51 states have internal predecessors, (63), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 20:31:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:20,849 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2023-11-23 20:31:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 20:31:20,853 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2023-11-23 20:31:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:20,863 INFO L225 Difference]: With dead ends: 109 [2023-11-23 20:31:20,863 INFO L226 Difference]: Without dead ends: 83 [2023-11-23 20:31:20,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 20:31:20,871 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:20,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-23 20:31:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-23 20:31:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-23 20:31:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2023-11-23 20:31:20,931 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 50 [2023-11-23 20:31:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:20,933 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2023-11-23 20:31:20,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 20:31:20,934 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2023-11-23 20:31:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:31:20,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:20,939 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-23 20:31:20,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:31:20,940 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:20,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash 912211624, now seen corresponding path program 1 times [2023-11-23 20:31:20,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:20,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537573313] [2023-11-23 20:31:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:31:21,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:21,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537573313] [2023-11-23 20:31:21,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537573313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:21,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:21,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:31:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148782440] [2023-11-23 20:31:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:21,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:31:21,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:21,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:31:21,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:21,551 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 20:31:21,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:21,869 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2023-11-23 20:31:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:31:21,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 55 [2023-11-23 20:31:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:21,873 INFO L225 Difference]: With dead ends: 140 [2023-11-23 20:31:21,874 INFO L226 Difference]: Without dead ends: 85 [2023-11-23 20:31:21,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 20:31:21,876 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 23 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:21,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 274 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:31:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-23 20:31:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-23 20:31:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.183673469387755) internal successors, (58), 50 states have internal predecessors, (58), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-11-23 20:31:21,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2023-11-23 20:31:21,892 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 55 [2023-11-23 20:31:21,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:21,892 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2023-11-23 20:31:21,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-23 20:31:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2023-11-23 20:31:21,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 20:31:21,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:21,896 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-23 20:31:21,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:31:21,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:21,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:21,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1075424670, now seen corresponding path program 1 times [2023-11-23 20:31:21,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:21,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9686531] [2023-11-23 20:31:21,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:21,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:22,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:31:22,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709900753] [2023-11-23 20:31:22,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:22,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:22,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:22,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:22,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:31:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:22,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 2092 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 20:31:22,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 20:31:22,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:31:22,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9686531] [2023-11-23 20:31:22,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:31:22,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709900753] [2023-11-23 20:31:22,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709900753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:22,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:22,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:31:22,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268726598] [2023-11-23 20:31:22,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:22,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:31:22,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:22,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:31:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:31:22,789 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-23 20:31:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:23,605 INFO L93 Difference]: Finished difference Result 148 states and 176 transitions. [2023-11-23 20:31:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:31:23,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 64 [2023-11-23 20:31:23,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:23,615 INFO L225 Difference]: With dead ends: 148 [2023-11-23 20:31:23,615 INFO L226 Difference]: Without dead ends: 93 [2023-11-23 20:31:23,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:31:23,620 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:23,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 559 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:31:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-23 20:31:23,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2023-11-23 20:31:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-23 20:31:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2023-11-23 20:31:23,641 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 64 [2023-11-23 20:31:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:23,641 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2023-11-23 20:31:23,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-23 20:31:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2023-11-23 20:31:23,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 20:31:23,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:23,644 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:23,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:31:23,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:23,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:23,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:23,867 INFO L85 PathProgramCache]: Analyzing trace with hash 544363271, now seen corresponding path program 1 times [2023-11-23 20:31:23,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:23,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180136027] [2023-11-23 20:31:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:23,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:23,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:31:23,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048699055] [2023-11-23 20:31:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:23,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:23,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:23,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:23,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:31:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:24,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 2095 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 20:31:24,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:31:24,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:31:24,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:24,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180136027] [2023-11-23 20:31:24,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:31:24,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048699055] [2023-11-23 20:31:24,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048699055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:24,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:24,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:31:24,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55868079] [2023-11-23 20:31:24,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:24,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:31:24,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:24,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:31:24,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:31:24,535 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 20:31:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:24,712 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2023-11-23 20:31:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:31:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 65 [2023-11-23 20:31:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:24,715 INFO L225 Difference]: With dead ends: 107 [2023-11-23 20:31:24,715 INFO L226 Difference]: Without dead ends: 90 [2023-11-23 20:31:24,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:24,716 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:24,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 247 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:31:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-23 20:31:24,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-11-23 20:31:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-23 20:31:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2023-11-23 20:31:24,739 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 65 [2023-11-23 20:31:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:24,742 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2023-11-23 20:31:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 20:31:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2023-11-23 20:31:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 20:31:24,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:24,749 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-23 20:31:24,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:31:24,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:24,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:24,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:24,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1635476901, now seen corresponding path program 1 times [2023-11-23 20:31:24,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:24,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532952070] [2023-11-23 20:31:24,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:24,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:25,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:31:25,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741146445] [2023-11-23 20:31:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:25,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:25,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:25,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:25,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:31:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:25,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:31:25,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:31:25,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:31:25,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532952070] [2023-11-23 20:31:25,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:31:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741146445] [2023-11-23 20:31:25,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741146445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:25,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:25,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:31:25,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075173553] [2023-11-23 20:31:25,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:25,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:31:25,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:25,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:31:25,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:31:25,647 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 20:31:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:26,106 INFO L93 Difference]: Finished difference Result 132 states and 156 transitions. [2023-11-23 20:31:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:31:26,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2023-11-23 20:31:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:26,109 INFO L225 Difference]: With dead ends: 132 [2023-11-23 20:31:26,109 INFO L226 Difference]: Without dead ends: 94 [2023-11-23 20:31:26,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:26,111 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 5 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:26,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 237 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:31:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-23 20:31:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2023-11-23 20:31:26,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 55 states have internal predecessors, (63), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-23 20:31:26,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2023-11-23 20:31:26,134 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 66 [2023-11-23 20:31:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:26,135 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2023-11-23 20:31:26,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 20:31:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2023-11-23 20:31:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 20:31:26,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:26,139 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-23 20:31:26,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-23 20:31:26,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:26,366 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:26,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:26,367 INFO L85 PathProgramCache]: Analyzing trace with hash -255902864, now seen corresponding path program 1 times [2023-11-23 20:31:26,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:26,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828802125] [2023-11-23 20:31:26,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:26,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:26,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:31:26,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859566194] [2023-11-23 20:31:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:26,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:26,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:26,484 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:26,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:31:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:27,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:31:27,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:31:27,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:31:27,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:27,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828802125] [2023-11-23 20:31:27,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:31:27,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859566194] [2023-11-23 20:31:27,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859566194] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:27,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:27,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:31:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520643174] [2023-11-23 20:31:27,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:31:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:31:27,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:27,140 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 20:31:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:27,624 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2023-11-23 20:31:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:31:27,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 67 [2023-11-23 20:31:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:27,629 INFO L225 Difference]: With dead ends: 128 [2023-11-23 20:31:27,630 INFO L226 Difference]: Without dead ends: 93 [2023-11-23 20:31:27,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 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 20:31:27,631 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 4 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:27,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 325 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:31:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-23 20:31:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2023-11-23 20:31:27,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 22 states have call successors, (22), 13 states have call predecessors, (22), 14 states have return successors, (23), 22 states have call predecessors, (23), 21 states have call successors, (23) [2023-11-23 20:31:27,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2023-11-23 20:31:27,649 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 67 [2023-11-23 20:31:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:27,650 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2023-11-23 20:31:27,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 20:31:27,650 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2023-11-23 20:31:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 20:31:27,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:27,652 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-23 20:31:27,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:31:27,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:27,853 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:31:27,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1261387483, now seen corresponding path program 1 times [2023-11-23 20:31:27,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:27,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656583390] [2023-11-23 20:31:27,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:27,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:27,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:31:27,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295316348] [2023-11-23 20:31:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:27,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:27,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:27,939 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:27,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2173e84e-4f7b-462d-9c62-52f41b7f14f3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:31:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:28,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-23 20:31:28,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:28,873 WARN L876 $PredicateComparison]: unable to prove that (exists ((|#Ultimate.C_memset_#ptr.offset| Int) (|v_#Ultimate.C_memset_#t~loopctr736_7| Int)) (= |c_#memory_int| (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| (store (select |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base|) (+ |#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr736_7|) |c_#Ultimate.C_memset_#value|)))) is different from true [2023-11-23 20:31:28,963 INFO L349 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-11-23 20:31:28,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2023-11-23 20:31:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-11-23 20:31:29,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:31:32,087 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_#Ultimate.C_memset_#t~loopctr736_12| Int) (|v_#Ultimate.C_memset_#ptr.offset_7| Int)) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_array_list_clean_up_~list#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_aws_array_list_clean_up_~list#1.base|) (+ |v_#Ultimate.C_memset_#t~loopctr736_12| |v_#Ultimate.C_memset_#ptr.offset_7|) 0)) |c_ULTIMATE.start_aws_array_list_clean_up_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_array_list_clean_up_harness_~#list~0#1.offset|) 256) 0)) is different from false [2023-11-23 20:31:32,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656583390] [2023-11-23 20:31:32,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:31:32,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295316348] [2023-11-23 20:31:32,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295316348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:31:32,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [232373291] [2023-11-23 20:31:32,130 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-11-23 20:31:32,131 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:31:32,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:31:32,140 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:31:32,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs