./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/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_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/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_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/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 edc61b8c285d87a6706f10a0369a5dd380942e398b4b2231a7f494f856622f23 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:54:49,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:54:49,919 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:54:49,927 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:54:49,928 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:54:49,966 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:54:49,967 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:54:49,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:54:49,969 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:54:49,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:54:49,974 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:54:49,975 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:54:49,975 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:54:49,977 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:54:49,977 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:54:49,978 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:54:49,978 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:54:49,978 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:54:49,979 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:54:49,979 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:54:49,980 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:54:49,980 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:54:49,981 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:54:49,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:54:49,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:54:49,982 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:54:49,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:54:49,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:54:49,984 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:54:49,984 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:54:49,985 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:54:49,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:54:49,986 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:54:49,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:54:49,986 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:54:49,987 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:54:49,987 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:54:49,987 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:54:49,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:54:49,988 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:54:49,988 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:54:49,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:54:49,988 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_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> edc61b8c285d87a6706f10a0369a5dd380942e398b4b2231a7f494f856622f23 [2023-11-12 00:54:50,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:54:50,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:54:50,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:54:50,284 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:54:50,284 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:54:50,286 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i [2023-11-12 00:54:53,385 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:54:54,118 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:54:54,118 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i [2023-11-12 00:54:54,160 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/data/cb1c908bd/7ca1aeda1418430d9404c682404b55e2/FLAGcd5ebf727 [2023-11-12 00:54:54,175 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/data/cb1c908bd/7ca1aeda1418430d9404c682404b55e2 [2023-11-12 00:54:54,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:54:54,179 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:54:54,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:54:54,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:54:54,186 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:54:54,187 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:54:54" (1/1) ... [2023-11-12 00:54:54,188 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ece961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:54, skipping insertion in model container [2023-11-12 00:54:54,189 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:54:54" (1/1) ... [2023-11-12 00:54:54,346 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:54:54,662 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_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i[4503,4516] [2023-11-12 00:54:54,672 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_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i[4563,4576] [2023-11-12 00:54:55,959 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:55,960 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:55,961 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:55,961 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:55,963 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:55,983 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:55,984 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:55,986 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:55,996 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:55,999 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:56,000 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:56,001 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:56,001 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:56,615 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:54:56,626 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:54:56,627 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:54:56,630 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:54:56,634 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:54:56,634 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:54:56,635 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:54:56,637 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:54:56,637 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:54:56,652 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:54:57,222 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,223 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,246 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,248 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,254 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,254 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,268 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,269 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,270 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,271 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,271 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,272 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,272 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:54:57,363 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:54:57,389 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_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i[4503,4516] [2023-11-12 00:54:57,389 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_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/sv-benchmarks/c/aws-c-common/aws_hash_table_init_unbounded_harness.i[4563,4576] [2023-11-12 00:54:57,480 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,480 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,481 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,481 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,482 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,488 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,488 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,489 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,490 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,491 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,491 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,492 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,492 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,524 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 00:54:57,525 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 00:54:57,526 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 00:54:57,527 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 00:54:57,528 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 00:54:57,529 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 00:54:57,529 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 00:54:57,530 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 00:54:57,532 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 00:54:57,532 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 00:54:57,587 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7576-7587] [2023-11-12 00:54:57,706 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,707 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,725 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,726 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,730 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,730 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,746 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,747 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,748 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,748 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,749 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,749 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,749 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 00:54:57,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:54:58,047 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,048 WARN L672 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,048 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,048 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,048 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,048 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,049 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,049 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,049 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,049 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,050 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,050 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,050 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,050 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,051 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,051 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,051 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,051 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 00:54:58,059 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:54:58,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58 WrapperNode [2023-11-12 00:54:58,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:54:58,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:54:58,062 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:54:58,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:54:58,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,216 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,339 INFO L138 Inliner]: procedures = 773, calls = 2430, calls flagged for inlining = 66, calls inlined = 11, statements flattened = 825 [2023-11-12 00:54:58,340 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:54:58,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:54:58,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:54:58,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:54:58,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,381 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,382 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,448 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,500 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:54:58,518 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:54:58,519 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:54:58,519 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:54:58,520 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (1/1) ... [2023-11-12 00:54:58,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:54:58,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:54:58,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:54:58,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:54:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-12 00:54:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-12 00:54:58,607 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-12 00:54:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:54:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 00:54:58,608 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 00:54:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 00:54:58,608 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 00:54:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-12 00:54:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-12 00:54:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:54:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:54:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:54:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:54:58,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:54:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 00:54:58,612 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 00:54:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:54:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 00:54:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 00:54:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:54:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:54:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-12 00:54:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-12 00:54:58,614 INFO L130 BoogieDeclarations]: Found specification of procedure s_update_template_size [2023-11-12 00:54:58,614 INFO L138 BoogieDeclarations]: Found implementation of procedure s_update_template_size [2023-11-12 00:54:58,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:54:58,614 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2023-11-12 00:54:58,614 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2023-11-12 00:54:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_calloc [2023-11-12 00:54:58,615 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_calloc [2023-11-12 00:54:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-12 00:54:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-12 00:54:58,616 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-12 00:54:58,616 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:54:58,616 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:54:58,616 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-12 00:54:58,617 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-12 00:54:58,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:54:58,617 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-12 00:54:58,617 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-12 00:54:58,617 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 00:54:58,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 00:54:58,618 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 00:54:58,618 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 00:54:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure s_alloc_state [2023-11-12 00:54:58,619 INFO L138 BoogieDeclarations]: Found implementation of procedure s_alloc_state [2023-11-12 00:54:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:54:59,086 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:54:59,089 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:55:01,104 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume !true; [2023-11-12 00:55:01,134 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:55:01,561 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:55:01,562 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 00:55:01,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:55:01 BoogieIcfgContainer [2023-11-12 00:55:01,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:55:01,570 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:55:01,572 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:55:01,576 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:55:01,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:54:54" (1/3) ... [2023-11-12 00:55:01,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b16c683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:55:01, skipping insertion in model container [2023-11-12 00:55:01,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:54:58" (2/3) ... [2023-11-12 00:55:01,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b16c683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:55:01, skipping insertion in model container [2023-11-12 00:55:01,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:55:01" (3/3) ... [2023-11-12 00:55:01,582 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_init_unbounded_harness.i [2023-11-12 00:55:01,603 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:55:01,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:55:01,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:55:01,685 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;@745698f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:55:01,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:55:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 00:55:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 00:55:01,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:01,703 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:55:01,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:01,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:01,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1435612513, now seen corresponding path program 1 times [2023-11-12 00:55:01,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:01,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975966589] [2023-11-12 00:55:01,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:01,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:55:02,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:02,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975966589] [2023-11-12 00:55:02,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975966589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:02,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:02,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:55:02,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566952931] [2023-11-12 00:55:02,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:02,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:55:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:55:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:55:02,763 INFO L87 Difference]: Start difference. First operand has 125 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 73 states have internal predecessors, (89), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-12 00:55:04,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:06,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:08,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:09,921 INFO L93 Difference]: Finished difference Result 157 states and 194 transitions. [2023-11-12 00:55:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:55:09,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 44 [2023-11-12 00:55:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:09,942 INFO L225 Difference]: With dead ends: 157 [2023-11-12 00:55:09,942 INFO L226 Difference]: Without dead ends: 122 [2023-11-12 00:55:09,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:55:09,949 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 4 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:09,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 392 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 3 Unknown, 0 Unchecked, 7.1s Time] [2023-11-12 00:55:09,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-12 00:55:10,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-11-12 00:55:10,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 71 states have internal predecessors, (82), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-12 00:55:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 149 transitions. [2023-11-12 00:55:10,015 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 149 transitions. Word has length 44 [2023-11-12 00:55:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:10,017 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 149 transitions. [2023-11-12 00:55:10,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-12 00:55:10,018 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 149 transitions. [2023-11-12 00:55:10,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-12 00:55:10,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:10,023 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:55:10,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:55:10,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:10,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash 2125250409, now seen corresponding path program 1 times [2023-11-12 00:55:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:10,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222827226] [2023-11-12 00:55:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:10,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:10,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:55:10,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567442244] [2023-11-12 00:55:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:10,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:10,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:10,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:55:10,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:55:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:11,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 2308 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:55:11,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:55:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:55:11,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:55:11,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:11,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222827226] [2023-11-12 00:55:11,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:55:11,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567442244] [2023-11-12 00:55:11,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567442244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:11,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:11,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:55:11,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288067872] [2023-11-12 00:55:11,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:11,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:55:11,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:11,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:55:11,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:55:11,126 INFO L87 Difference]: Start difference. First operand 122 states and 149 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-12 00:55:13,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:15,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:17,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:19,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:20,833 INFO L93 Difference]: Finished difference Result 208 states and 251 transitions. [2023-11-12 00:55:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:55:20,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 64 [2023-11-12 00:55:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:20,839 INFO L225 Difference]: With dead ends: 208 [2023-11-12 00:55:20,843 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 00:55:20,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 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 00:55:20,846 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:20,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 504 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 4 Unknown, 0 Unchecked, 9.7s Time] [2023-11-12 00:55:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 00:55:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-12 00:55:20,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 74 states have internal predecessors, (85), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (36), 34 states have call predecessors, (36), 33 states have call successors, (36) [2023-11-12 00:55:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2023-11-12 00:55:20,879 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 64 [2023-11-12 00:55:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:20,880 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2023-11-12 00:55:20,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-12 00:55:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2023-11-12 00:55:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-12 00:55:20,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:20,885 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:55:20,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:55:21,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:21,097 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:21,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2095033517, now seen corresponding path program 1 times [2023-11-12 00:55:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:21,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597271748] [2023-11-12 00:55:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:21,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:55:22,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:22,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597271748] [2023-11-12 00:55:22,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597271748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:22,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:22,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:55:22,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391955428] [2023-11-12 00:55:22,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:22,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:55:22,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:55:22,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:55:22,711 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 00:55:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:24,868 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2023-11-12 00:55:24,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:55:24,868 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 68 [2023-11-12 00:55:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:24,871 INFO L225 Difference]: With dead ends: 157 [2023-11-12 00:55:24,871 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 00:55:24,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:55:24,873 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 0 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:24,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 506 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-12 00:55:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 00:55:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-12 00:55:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 74 states have internal predecessors, (84), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (36), 34 states have call predecessors, (36), 33 states have call successors, (36) [2023-11-12 00:55:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 154 transitions. [2023-11-12 00:55:24,890 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 154 transitions. Word has length 68 [2023-11-12 00:55:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:24,891 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 154 transitions. [2023-11-12 00:55:24,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 00:55:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 154 transitions. [2023-11-12 00:55:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-12 00:55:24,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:24,896 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:55:24,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:55:24,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:24,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash 843922543, now seen corresponding path program 1 times [2023-11-12 00:55:24,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:24,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11596984] [2023-11-12 00:55:24,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:24,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:25,084 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:55:25,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137895507] [2023-11-12 00:55:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:25,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:25,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:25,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:55:25,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:55:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:25,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 2600 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:55:25,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:55:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:55:25,855 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:55:25,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11596984] [2023-11-12 00:55:25,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:55:25,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137895507] [2023-11-12 00:55:25,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137895507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:25,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:25,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:55:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654597301] [2023-11-12 00:55:25,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:55:25,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:55:25,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:55:25,859 INFO L87 Difference]: Start difference. First operand 126 states and 154 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-12 00:55:27,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:29,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:31,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:33,361 INFO L93 Difference]: Finished difference Result 210 states and 251 transitions. [2023-11-12 00:55:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:55:33,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 94 [2023-11-12 00:55:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:33,365 INFO L225 Difference]: With dead ends: 210 [2023-11-12 00:55:33,365 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 00:55:33,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:55:33,368 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 0 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:33,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 385 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2023-11-12 00:55:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 00:55:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2023-11-12 00:55:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-12 00:55:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2023-11-12 00:55:33,407 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 94 [2023-11-12 00:55:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:33,408 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2023-11-12 00:55:33,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-12 00:55:33,408 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2023-11-12 00:55:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-12 00:55:33,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:33,421 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:55:33,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:55:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:33,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:33,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1759867598, now seen corresponding path program 1 times [2023-11-12 00:55:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:33,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313094549] [2023-11-12 00:55:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:33,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:55:33,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092849357] [2023-11-12 00:55:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:33,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:33,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:33,884 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:55:33,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:55:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:34,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:55:34,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:55:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-12 00:55:35,018 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:55:35,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:35,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313094549] [2023-11-12 00:55:35,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:55:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092849357] [2023-11-12 00:55:35,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092849357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:35,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:35,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 00:55:35,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009720391] [2023-11-12 00:55:35,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:35,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 00:55:35,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:35,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 00:55:35,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:55:35,032 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-12 00:55:38,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:38,192 INFO L93 Difference]: Finished difference Result 158 states and 189 transitions. [2023-11-12 00:55:38,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:55:38,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 99 [2023-11-12 00:55:38,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:38,196 INFO L225 Difference]: With dead ends: 158 [2023-11-12 00:55:38,196 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 00:55:38,197 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 00:55:38,198 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:38,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 495 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-12 00:55:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 00:55:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-12 00:55:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 74 states have internal predecessors, (83), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (36), 34 states have call predecessors, (36), 33 states have call successors, (36) [2023-11-12 00:55:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 153 transitions. [2023-11-12 00:55:38,217 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 153 transitions. Word has length 99 [2023-11-12 00:55:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:38,218 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 153 transitions. [2023-11-12 00:55:38,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.5) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-12 00:55:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 153 transitions. [2023-11-12 00:55:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:55:38,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:38,224 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:55:38,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:55:38,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:38,440 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:38,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:38,441 INFO L85 PathProgramCache]: Analyzing trace with hash -335019768, now seen corresponding path program 1 times [2023-11-12 00:55:38,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:38,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705011282] [2023-11-12 00:55:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:38,647 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:55:38,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719995592] [2023-11-12 00:55:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:38,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:38,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:38,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:55:38,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:55:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:39,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 2703 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-12 00:55:39,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:55:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-12 00:55:39,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:55:39,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705011282] [2023-11-12 00:55:39,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:55:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719995592] [2023-11-12 00:55:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719995592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:39,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:39,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:55:39,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636072961] [2023-11-12 00:55:39,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:39,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:55:39,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:40,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:55:40,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:55:40,008 INFO L87 Difference]: Start difference. First operand 126 states and 153 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-12 00:55:42,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:55:42,990 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2023-11-12 00:55:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:55:42,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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 103 [2023-11-12 00:55:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:55:42,993 INFO L225 Difference]: With dead ends: 158 [2023-11-12 00:55:42,994 INFO L226 Difference]: Without dead ends: 126 [2023-11-12 00:55:42,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:55:42,995 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 2 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:55:42,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 632 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-12 00:55:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-12 00:55:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2023-11-12 00:55:43,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 71 states have internal predecessors, (79), 34 states have call successors, (34), 17 states have call predecessors, (34), 17 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-12 00:55:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2023-11-12 00:55:43,016 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 103 [2023-11-12 00:55:43,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:55:43,017 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2023-11-12 00:55:43,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-12 00:55:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2023-11-12 00:55:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:55:43,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:55:43,033 INFO L195 NwaCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:55:43,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:55:43,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:43,245 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:55:43,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:55:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash 346957403, now seen corresponding path program 1 times [2023-11-12 00:55:43,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:55:43,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043153277] [2023-11-12 00:55:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:55:43,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 00:55:43,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577820279] [2023-11-12 00:55:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:55:43,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:55:43,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:55:43,415 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:55:43,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d6670b3-a3fc-4a56-8318-c2952e0e5bd6/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:55:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:55:44,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 2753 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-12 00:55:44,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:55:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-12 00:55:44,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:55:44,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:55:44,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043153277] [2023-11-12 00:55:44,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 00:55:44,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577820279] [2023-11-12 00:55:44,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577820279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:55:44,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:55:44,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 00:55:44,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201343958] [2023-11-12 00:55:44,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:55:44,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 00:55:44,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:55:44,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 00:55:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:55:44,390 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-12 00:55:46,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:48,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:55:50,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers []