./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash f4f0a7d90baaf3c6f383556a6db0dccf9ba6f55d8bb50a635d310d7c96d51ae8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:42:33,903 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:42:34,050 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:42:34,057 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:42:34,060 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:42:34,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:42:34,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:42:34,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:42:34,110 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:42:34,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:42:34,112 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:42:34,113 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:42:34,114 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:42:34,114 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:42:34,115 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:42:34,116 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:42:34,117 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:42:34,118 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:42:34,119 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:42:34,119 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:42:34,120 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:42:34,121 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:42:34,122 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:42:34,123 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:42:34,123 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:42:34,124 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:42:34,125 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:42:34,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:42:34,126 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:42:34,127 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:42:34,127 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:42:34,128 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:42:34,129 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:42:34,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:42:34,130 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:42:34,152 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:42:34,153 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:42:34,154 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:42:34,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:42:34,155 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:42:34,155 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:42:34,156 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:42:34,156 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_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4f0a7d90baaf3c6f383556a6db0dccf9ba6f55d8bb50a635d310d7c96d51ae8 [2023-11-12 00:42:34,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:42:34,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:42:34,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:42:34,543 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:42:34,544 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:42:34,546 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i [2023-11-12 00:42:38,008 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:42:38,780 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:42:38,782 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i [2023-11-12 00:42:38,842 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/data/1f715d99f/642d7598f3304ee8a78017777451e018/FLAGca1796d78 [2023-11-12 00:42:38,873 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/data/1f715d99f/642d7598f3304ee8a78017777451e018 [2023-11-12 00:42:38,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:42:38,879 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:42:38,881 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:42:38,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:42:38,888 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:42:38,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:42:38" (1/1) ... [2023-11-12 00:42:38,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774a46ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:38, skipping insertion in model container [2023-11-12 00:42:38,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:42:38" (1/1) ... [2023-11-12 00:42:39,113 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:42:39,523 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_f26d2021-f8c4-4e41-b59e-92a588eb8033/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i[4494,4507] [2023-11-12 00:42:39,538 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_f26d2021-f8c4-4e41-b59e-92a588eb8033/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i[4554,4567] [2023-11-12 00:42:41,430 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,431 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,432 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,434 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,436 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,488 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,493 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,496 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,497 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,500 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,502 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,503 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:41,504 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:42,162 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:42:42,164 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:42:42,166 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:42:42,167 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:42:42,170 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:42:42,171 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:42:42,172 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:42:42,173 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:42:42,174 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:42:42,175 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:42:43,030 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,031 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,064 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,066 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,074 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,075 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,099 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,100 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,101 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,101 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,102 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,103 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,104 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:42:43,223 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:42:43,241 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_f26d2021-f8c4-4e41-b59e-92a588eb8033/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i[4494,4507] [2023-11-12 00:42:43,242 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_f26d2021-f8c4-4e41-b59e-92a588eb8033/sv-benchmarks/c/aws-c-common/aws_hash_table_clear_harness_negated.i[4554,4567] [2023-11-12 00:42:43,292 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,293 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,294 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,295 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,295 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,304 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,305 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,307 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,307 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,309 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,310 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,311 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,311 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,355 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:42:43,357 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:42:43,358 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:42:43,359 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:42:43,361 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:42:43,361 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:42:43,362 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:42:43,364 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:42:43,368 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:42:43,369 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:42:43,447 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7553-7564] [2023-11-12 00:42:43,668 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,669 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,681 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,682 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,688 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,689 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,707 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,708 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,709 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,710 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,710 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,712 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,712 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:42:43,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:42:44,099 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,099 WARN L672 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,100 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,100 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,100 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,100 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,101 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,101 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,101 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,101 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,101 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,102 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,102 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,102 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,102 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,102 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,103 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,103 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:42:44,113 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:42:44,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44 WrapperNode [2023-11-12 00:42:44,114 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:42:44,116 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:42:44,116 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:42:44,116 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:42:44,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,361 INFO L138 Inliner]: procedures = 773, calls = 2441, calls flagged for inlining = 68, calls inlined = 13, statements flattened = 611 [2023-11-12 00:42:44,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:42:44,363 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:42:44,363 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:42:44,363 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:42:44,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,387 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,388 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,467 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,473 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,498 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,531 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:42:44,540 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:42:44,540 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:42:44,541 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:42:44,542 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (1/1) ... [2023-11-12 00:42:44,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:42:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:44,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:42:44,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:42:44,635 INFO L130 BoogieDeclarations]: Found specification of procedure memset_override_0_impl [2023-11-12 00:42:44,635 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_override_0_impl [2023-11-12 00:42:44,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-12 00:42:44,636 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:42:44,637 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:42:44,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:42:44,637 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:42:44,637 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:42:44,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:42:44,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:42:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-12 00:42:44,638 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-12 00:42:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_clear [2023-11-12 00:42:44,638 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_clear [2023-11-12 00:42:44,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:42:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:42:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:42:44,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:42:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:42:44,640 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 00:42:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 00:42:44,640 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 00:42:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 00:42:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:42:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 00:42:44,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 00:42:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:42:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 00:42:44,641 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 00:42:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:42:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-12 00:42:44,642 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-12 00:42:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-12 00:42:44,643 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-12 00:42:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:42:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-12 00:42:44,644 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-12 00:42:44,644 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:42:44,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:42:44,644 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:42:44,644 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:42:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-12 00:42:44,645 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-12 00:42:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:42:44,645 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 00:42:44,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 00:42:44,647 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 00:42:44,647 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 00:42:44,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:42:45,160 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:42:45,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:42:46,475 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:42:46,759 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:42:46,759 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:42:46,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:42:46 BoogieIcfgContainer [2023-11-12 00:42:46,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:42:46,766 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:42:46,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:42:46,771 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:42:46,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:42:38" (1/3) ... [2023-11-12 00:42:46,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2a6620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:42:46, skipping insertion in model container [2023-11-12 00:42:46,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:42:44" (2/3) ... [2023-11-12 00:42:46,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b2a6620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:42:46, skipping insertion in model container [2023-11-12 00:42:46,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:42:46" (3/3) ... [2023-11-12 00:42:46,780 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_clear_harness_negated.i [2023-11-12 00:42:46,804 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:42:46,812 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:42:46,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:42:46,916 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;@49df4173, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:42:46,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:42:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand has 137 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-12 00:42:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 00:42:46,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:46,943 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:46,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:42:46,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:46,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1580256242, now seen corresponding path program 1 times [2023-11-12 00:42:46,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:46,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825925144] [2023-11-12 00:42:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:46,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:47,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:42:47,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231091929] [2023-11-12 00:42:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:47,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:47,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:47,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:47,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:42:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:48,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:42:48,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-12 00:42:48,460 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:42:48,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:48,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825925144] [2023-11-12 00:42:48,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:42:48,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231091929] [2023-11-12 00:42:48,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231091929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:48,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:42:48,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:42:48,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379206914] [2023-11-12 00:42:48,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:48,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:42:48,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:42:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:42:48,512 INFO L87 Difference]: Start difference. First operand has 137 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 41 states have call successors, (41), 18 states have call predecessors, (41), 18 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:42:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:42:49,006 INFO L93 Difference]: Finished difference Result 244 states and 317 transitions. [2023-11-12 00:42:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:42:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 99 [2023-11-12 00:42:49,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:42:49,029 INFO L225 Difference]: With dead ends: 244 [2023-11-12 00:42:49,029 INFO L226 Difference]: Without dead ends: 138 [2023-11-12 00:42:49,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:42:49,051 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 1 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:42:49,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 576 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:42:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-12 00:42:49,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-11-12 00:42:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 77 states have (on average 1.155844155844156) internal successors, (89), 78 states have internal predecessors, (89), 41 states have call successors, (41), 18 states have call predecessors, (41), 19 states have return successors, (41), 41 states have call predecessors, (41), 40 states have call successors, (41) [2023-11-12 00:42:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 171 transitions. [2023-11-12 00:42:49,156 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 171 transitions. Word has length 99 [2023-11-12 00:42:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:42:49,158 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 171 transitions. [2023-11-12 00:42:49,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-12 00:42:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 171 transitions. [2023-11-12 00:42:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:42:49,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:42:49,177 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:42:49,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:42:49,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 00:42:49,395 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:42:49,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:42:49,396 INFO L85 PathProgramCache]: Analyzing trace with hash -825518793, now seen corresponding path program 1 times [2023-11-12 00:42:49,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:42:49,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766958929] [2023-11-12 00:42:49,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:49,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:42:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-12 00:42:52,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:42:52,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766958929] [2023-11-12 00:42:52,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766958929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:42:52,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584240852] [2023-11-12 00:42:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:42:52,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:42:52,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:42:52,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:42:52,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:42:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:42:53,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 00:42:53,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:42:53,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 00:42:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:42:54,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:42:54,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584240852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:42:54,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:42:54,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2023-11-12 00:42:54,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836447607] [2023-11-12 00:42:54,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:42:54,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 00:42:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:42:54,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 00:42:54,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-12 00:42:54,214 INFO L87 Difference]: Start difference. First operand 138 states and 171 transitions. Second operand has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:42:57,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 00:42:59,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:01,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:03,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:05,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:07,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:10,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:12,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:14,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:16,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:18,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-12 00:43:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:18,776 INFO L93 Difference]: Finished difference Result 272 states and 329 transitions. [2023-11-12 00:43:18,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:43:18,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 103 [2023-11-12 00:43:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:18,784 INFO L225 Difference]: With dead ends: 272 [2023-11-12 00:43:18,784 INFO L226 Difference]: Without dead ends: 182 [2023-11-12 00:43:18,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:43:18,787 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 59 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 12 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:18,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 878 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 403 Invalid, 11 Unknown, 0 Unchecked, 24.4s Time] [2023-11-12 00:43:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-12 00:43:18,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2023-11-12 00:43:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 103 states have internal predecessors, (115), 49 states have call successors, (49), 28 states have call predecessors, (49), 30 states have return successors, (51), 49 states have call predecessors, (51), 48 states have call successors, (51) [2023-11-12 00:43:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 215 transitions. [2023-11-12 00:43:18,815 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 215 transitions. Word has length 103 [2023-11-12 00:43:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:18,815 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 215 transitions. [2023-11-12 00:43:18,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (26), 3 states have call predecessors, (26), 4 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-12 00:43:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 215 transitions. [2023-11-12 00:43:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-12 00:43:18,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:18,819 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:43:18,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:19,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:19,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:19,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash 115149655, now seen corresponding path program 1 times [2023-11-12 00:43:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:19,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091296980] [2023-11-12 00:43:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-12 00:43:20,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:43:20,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091296980] [2023-11-12 00:43:20,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091296980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:43:20,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30354953] [2023-11-12 00:43:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:20,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:20,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:20,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:20,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f26d2021-f8c4-4e41-b59e-92a588eb8033/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:43:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:21,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 2333 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-12 00:43:21,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:21,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 00:43:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 00:43:21,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:43:21,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30354953] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:43:21,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:43:21,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2023-11-12 00:43:21,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799415930] [2023-11-12 00:43:21,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:43:21,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 00:43:21,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:43:21,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 00:43:21,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-11-12 00:43:21,748 INFO L87 Difference]: Start difference. First operand 181 states and 215 transitions. Second operand has 12 states, 9 states have (on average 5.555555555555555) internal successors, (50), 10 states have internal predecessors, (50), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-12 00:43:26,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 00:43:28,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]