./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/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_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/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_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/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 3bf4efa014e51efebc29a26fae4d93bdd4ac97a340040c60e527138ec3a88197 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:05,953 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:06,079 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:31:06,084 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:06,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:06,106 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:06,107 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:06,108 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:06,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:06,109 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:06,110 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:06,110 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:06,111 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:06,111 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:06,112 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:06,112 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:06,113 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:06,113 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:06,114 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:06,115 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:06,115 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:06,116 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:06,117 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:06,117 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:31:06,118 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:06,118 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:06,119 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:31:06,119 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:06,120 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:31:06,121 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:31:06,121 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:06,122 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:06,122 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:06,123 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:06,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:06,124 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:06,125 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:06,125 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:31:06,126 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:06,126 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:06,126 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:06,127 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:31:06,127 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:06,128 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:06,128 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_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bf4efa014e51efebc29a26fae4d93bdd4ac97a340040c60e527138ec3a88197 [2023-11-23 21:31:06,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:06,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:06,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:06,448 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:06,449 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:06,450 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i [2023-11-23 21:31:09,580 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:10,319 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:10,320 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i [2023-11-23 21:31:10,392 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/data/36f68129d/146044e4a4f6450190ee091a49c307b8/FLAG88e14fcd1 [2023-11-23 21:31:10,411 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/data/36f68129d/146044e4a4f6450190ee091a49c307b8 [2023-11-23 21:31:10,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:10,420 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:10,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:10,425 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:10,431 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:10,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:10" (1/1) ... [2023-11-23 21:31:10,433 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf51a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:10, skipping insertion in model container [2023-11-23 21:31:10,433 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:10" (1/1) ... [2023-11-23 21:31:10,601 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:11,012 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_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4497,4510] [2023-11-23 21:31:11,022 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_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4557,4570] [2023-11-23 21:31:12,610 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,611 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,611 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,613 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,614 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,632 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,634 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,636 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,638 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,640 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,642 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,643 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:12,644 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,265 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:31:13,267 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:31:13,268 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:31:13,270 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:31:13,272 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:31:13,273 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:31:13,274 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:31:13,275 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:31:13,276 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:31:13,277 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:31:13,939 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,940 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,967 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,969 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,976 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,977 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,994 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,995 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,996 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,997 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,997 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,998 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:13,998 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:14,208 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:14,239 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_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4497,4510] [2023-11-23 21:31:14,240 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_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4557,4570] [2023-11-23 21:31:14,314 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,315 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,315 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,318 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,319 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,335 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,337 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,338 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,339 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,340 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,341 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,342 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,343 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,404 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 21:31:14,406 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 21:31:14,408 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 21:31:14,409 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 21:31:14,411 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 21:31:14,412 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 21:31:14,413 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 21:31:14,414 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 21:31:14,415 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 21:31:14,417 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 21:31:14,482 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7585-7596] [2023-11-23 21:31:14,624 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,624 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,634 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,635 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,639 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,639 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,650 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,651 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,652 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,653 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,653 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,654 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,654 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 21:31:14,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:15,046 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,047 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,047 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,047 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,047 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,047 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,048 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,048 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,048 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,048 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,048 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,048 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,049 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,049 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,049 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,049 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,049 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,049 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:15,057 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:15,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15 WrapperNode [2023-11-23 21:31:15,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:15,060 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:15,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:15,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:15,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,208 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,298 INFO L138 Inliner]: procedures = 773, calls = 2446, calls flagged for inlining = 71, calls inlined = 16, statements flattened = 713 [2023-11-23 21:31:15,298 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:15,299 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:15,299 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:15,299 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:15,309 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,318 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,319 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,381 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,385 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,393 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,426 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:15,427 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:15,428 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:15,428 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:15,428 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (1/1) ... [2023-11-23 21:31:15,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:15,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:15,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:15,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure memset_override_0_impl [2023-11-23 21:31:15,519 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_override_0_impl [2023-11-23 21:31:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-23 21:31:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 21:31:15,519 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 21:31:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:31:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 21:31:15,520 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 21:31:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:31:15,520 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:31:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-23 21:31:15,521 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-23 21:31:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:31:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:31:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:15,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 21:31:15,522 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 21:31:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 21:31:15,522 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 21:31:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-23 21:31:15,522 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-23 21:31:15,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:31:15,523 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-23 21:31:15,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-23 21:31:15,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:31:15,523 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 21:31:15,523 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 21:31:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:31:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-23 21:31:15,524 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-23 21:31:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-23 21:31:15,524 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-23 21:31:15,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:31:15,525 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-23 21:31:15,525 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-23 21:31:15,525 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:31:15,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:31:15,525 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:31:15,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:31:15,525 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-23 21:31:15,526 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-23 21:31:15,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:31:15,526 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 21:31:15,526 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 21:31:15,526 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 21:31:15,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 21:31:15,527 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-23 21:31:15,527 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-23 21:31:15,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:15,987 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:15,990 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:16,908 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:17,100 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:17,101 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:31:17,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:17 BoogieIcfgContainer [2023-11-23 21:31:17,103 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:17,106 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:17,106 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:17,109 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:17,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:10" (1/3) ... [2023-11-23 21:31:17,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65eb34c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:17, skipping insertion in model container [2023-11-23 21:31:17,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:15" (2/3) ... [2023-11-23 21:31:17,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65eb34c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:17, skipping insertion in model container [2023-11-23 21:31:17,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:17" (3/3) ... [2023-11-23 21:31:17,113 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_clean_up_harness.i [2023-11-23 21:31:17,135 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:17,135 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:31:17,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:17,202 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;@4e9e60ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:17,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:31:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 47 states have call successors, (47), 19 states have call predecessors, (47), 19 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-23 21:31:17,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-23 21:31:17,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:17,229 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-23 21:31:17,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:17,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:17,237 INFO L85 PathProgramCache]: Analyzing trace with hash 229750920, now seen corresponding path program 1 times [2023-11-23 21:31:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:17,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145878860] [2023-11-23 21:31:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:17,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:17,768 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:31:17,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540562772] [2023-11-23 21:31:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:17,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:17,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:17,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:31:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:18,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 2277 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:31:18,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:31:18,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:31:18,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:18,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145878860] [2023-11-23 21:31:18,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:31:18,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540562772] [2023-11-23 21:31:18,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540562772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:18,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:18,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:31:18,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277842340] [2023-11-23 21:31:18,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:18,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:18,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:18,711 INFO L87 Difference]: Start difference. First operand has 156 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 47 states have call successors, (47), 19 states have call predecessors, (47), 19 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:31:19,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:19,387 INFO L93 Difference]: Finished difference Result 282 states and 369 transitions. [2023-11-23 21:31:19,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:19,394 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 94 [2023-11-23 21:31:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:19,405 INFO L225 Difference]: With dead ends: 282 [2023-11-23 21:31:19,405 INFO L226 Difference]: Without dead ends: 157 [2023-11-23 21:31:19,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 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 21:31:19,421 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:19,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 668 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:31:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-23 21:31:19,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-11-23 21:31:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 90 states have internal predecessors, (103), 47 states have call successors, (47), 19 states have call predecessors, (47), 20 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2023-11-23 21:31:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 197 transitions. [2023-11-23 21:31:19,514 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 197 transitions. Word has length 94 [2023-11-23 21:31:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:19,517 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 197 transitions. [2023-11-23 21:31:19,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-23 21:31:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 197 transitions. [2023-11-23 21:31:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-23 21:31:19,532 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:19,533 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:19,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:19,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:19,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:19,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:19,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1161473874, now seen corresponding path program 1 times [2023-11-23 21:31:19,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:19,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25366064] [2023-11-23 21:31:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:19,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-23 21:31:22,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:22,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25366064] [2023-11-23 21:31:22,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25366064] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:22,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:22,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:31:22,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256957489] [2023-11-23 21:31:22,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:22,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:22,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:22,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:31:22,514 INFO L87 Difference]: Start difference. First operand 157 states and 197 transitions. Second operand has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 21:31:23,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:23,465 INFO L93 Difference]: Finished difference Result 266 states and 338 transitions. [2023-11-23 21:31:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:31:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 98 [2023-11-23 21:31:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:23,472 INFO L225 Difference]: With dead ends: 266 [2023-11-23 21:31:23,474 INFO L226 Difference]: Without dead ends: 159 [2023-11-23 21:31:23,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:31:23,479 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:23,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1014 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:31:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-23 21:31:23,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-11-23 21:31:23,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 47 states have call successors, (47), 19 states have call predecessors, (47), 21 states have return successors, (50), 47 states have call predecessors, (50), 46 states have call successors, (50) [2023-11-23 21:31:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2023-11-23 21:31:23,519 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 98 [2023-11-23 21:31:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:23,522 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2023-11-23 21:31:23,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-23 21:31:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2023-11-23 21:31:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-23 21:31:23,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:23,529 INFO L195 NwaCegarLoop]: trace histogram [10, 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] [2023-11-23 21:31:23,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:31:23,530 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:23,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:23,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1834973132, now seen corresponding path program 1 times [2023-11-23 21:31:23,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:23,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037614209] [2023-11-23 21:31:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:23,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-23 21:31:25,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:25,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037614209] [2023-11-23 21:31:25,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037614209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:25,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:25,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:31:25,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407893894] [2023-11-23 21:31:25,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:25,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:25,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:25,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:31:25,573 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-23 21:31:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:26,368 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2023-11-23 21:31:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:31:26,370 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 104 [2023-11-23 21:31:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:26,373 INFO L225 Difference]: With dead ends: 273 [2023-11-23 21:31:26,373 INFO L226 Difference]: Without dead ends: 164 [2023-11-23 21:31:26,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:31:26,376 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 50 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:26,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 850 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:31:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-23 21:31:26,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2023-11-23 21:31:26,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 94 states have internal predecessors, (106), 47 states have call successors, (47), 19 states have call predecessors, (47), 22 states have return successors, (51), 48 states have call predecessors, (51), 46 states have call successors, (51) [2023-11-23 21:31:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2023-11-23 21:31:26,423 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 104 [2023-11-23 21:31:26,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:26,424 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2023-11-23 21:31:26,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-11-23 21:31:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2023-11-23 21:31:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-23 21:31:26,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:26,427 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:26,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:31:26,427 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:26,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1106873190, now seen corresponding path program 1 times [2023-11-23 21:31:26,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:26,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654223613] [2023-11-23 21:31:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:26,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-23 21:31:28,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:28,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654223613] [2023-11-23 21:31:28,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654223613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:28,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:28,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:31:28,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827735953] [2023-11-23 21:31:28,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:28,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:31:28,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:31:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:31:28,825 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 21:31:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:30,132 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2023-11-23 21:31:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:31:30,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 108 [2023-11-23 21:31:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:30,136 INFO L225 Difference]: With dead ends: 169 [2023-11-23 21:31:30,137 INFO L226 Difference]: Without dead ends: 167 [2023-11-23 21:31:30,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:31:30,138 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 59 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:30,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 953 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:31:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-23 21:31:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2023-11-23 21:31:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 97 states have internal predecessors, (109), 47 states have call successors, (47), 20 states have call predecessors, (47), 23 states have return successors, (51), 48 states have call predecessors, (51), 46 states have call successors, (51) [2023-11-23 21:31:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2023-11-23 21:31:30,173 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 108 [2023-11-23 21:31:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:30,176 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2023-11-23 21:31:30,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-23 21:31:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2023-11-23 21:31:30,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-23 21:31:30,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:30,181 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:30,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:31:30,182 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:30,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:30,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1904585735, now seen corresponding path program 1 times [2023-11-23 21:31:30,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:30,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467498517] [2023-11-23 21:31:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:30,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-11-23 21:31:40,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:40,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467498517] [2023-11-23 21:31:40,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467498517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:40,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:40,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-11-23 21:31:40,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989279817] [2023-11-23 21:31:40,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-23 21:31:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:40,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-23 21:31:40,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-11-23 21:31:40,218 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 22 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) [2023-11-23 21:31:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:44,775 INFO L93 Difference]: Finished difference Result 194 states and 236 transitions. [2023-11-23 21:31:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 21:31:44,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) Word has length 123 [2023-11-23 21:31:44,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:44,780 INFO L225 Difference]: With dead ends: 194 [2023-11-23 21:31:44,780 INFO L226 Difference]: Without dead ends: 171 [2023-11-23 21:31:44,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:31:44,784 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 178 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:44,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 763 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-23 21:31:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-23 21:31:44,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2023-11-23 21:31:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 100 states have internal predecessors, (112), 47 states have call successors, (47), 21 states have call predecessors, (47), 24 states have return successors, (53), 48 states have call predecessors, (53), 46 states have call successors, (53) [2023-11-23 21:31:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 212 transitions. [2023-11-23 21:31:44,811 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 212 transitions. Word has length 123 [2023-11-23 21:31:44,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:44,812 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 212 transitions. [2023-11-23 21:31:44,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) [2023-11-23 21:31:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 212 transitions. [2023-11-23 21:31:44,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-23 21:31:44,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:44,815 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:31:44,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:44,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1050559820, now seen corresponding path program 1 times [2023-11-23 21:31:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:44,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571053957] [2023-11-23 21:31:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-23 21:31:45,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:45,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571053957] [2023-11-23 21:31:45,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571053957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:45,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:45,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:31:45,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155855279] [2023-11-23 21:31:45,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:45,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:31:45,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:45,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:31:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:31:45,630 INFO L87 Difference]: Start difference. First operand 170 states and 212 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-11-23 21:31:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:46,450 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2023-11-23 21:31:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:31:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 125 [2023-11-23 21:31:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:46,456 INFO L225 Difference]: With dead ends: 263 [2023-11-23 21:31:46,456 INFO L226 Difference]: Without dead ends: 170 [2023-11-23 21:31:46,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:46,458 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 3 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:46,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 601 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:31:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-23 21:31:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-11-23 21:31:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 100 states have internal predecessors, (111), 47 states have call successors, (47), 21 states have call predecessors, (47), 24 states have return successors, (53), 48 states have call predecessors, (53), 46 states have call successors, (53) [2023-11-23 21:31:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 211 transitions. [2023-11-23 21:31:46,519 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 211 transitions. Word has length 125 [2023-11-23 21:31:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:46,520 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 211 transitions. [2023-11-23 21:31:46,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-11-23 21:31:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 211 transitions. [2023-11-23 21:31:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-23 21:31:46,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:46,523 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:46,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:31:46,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:46,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash 49123652, now seen corresponding path program 1 times [2023-11-23 21:31:46,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:46,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291336060] [2023-11-23 21:31:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:46,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-23 21:31:48,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:48,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291336060] [2023-11-23 21:31:48,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291336060] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:48,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731341043] [2023-11-23 21:31:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:48,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:48,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:48,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:48,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47cbca6-ab1f-45dd-b10c-567d49a4ba9d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:31:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:49,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-23 21:31:49,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2023-11-23 21:31:50,187 INFO L327 TraceCheckSpWp]: Computing backward predicates...