./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91 --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 0f893dc40cf70b8d30dda6e110329e0bc2218e18bc668acf080889b069fe51ab --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:56:54,038 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:56:54,176 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:56:54,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:56:54,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:56:54,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:56:54,236 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:56:54,236 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:56:54,237 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:56:54,243 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:56:54,244 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:56:54,244 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:56:54,245 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:56:54,247 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:56:54,248 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:56:54,248 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:56:54,249 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:56:54,249 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:56:54,250 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:56:54,250 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:56:54,251 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:56:54,252 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:56:54,253 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:56:54,254 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:56:54,254 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:56:54,255 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:56:54,255 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:56:54,256 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:56:54,256 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:56:54,257 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:56:54,258 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:56:54,259 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:56:54,259 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:56:54,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:56:54,260 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:54,260 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:56:54,260 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:56:54,261 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:56:54,261 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:56:54,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:56:54,262 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:56:54,262 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:56:54,262 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:56:54,263 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:56:54,263 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_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f893dc40cf70b8d30dda6e110329e0bc2218e18bc668acf080889b069fe51ab [2023-11-24 23:56:54,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:56:54,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:56:54,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:56:54,648 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:56:54,649 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:56:54,653 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i [2023-11-24 23:56:57,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:56:58,714 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:56:58,715 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i [2023-11-24 23:56:58,780 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/data/c24d7d1ab/559f767e42e84883a5ff4fd8a62ecfa8/FLAG487af3b70 [2023-11-24 23:56:58,803 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/data/c24d7d1ab/559f767e42e84883a5ff4fd8a62ecfa8 [2023-11-24 23:56:58,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:56:58,812 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:56:58,816 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:58,816 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:56:58,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:56:58,824 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:58" (1/1) ... [2023-11-24 23:56:58,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f7c6dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:58, skipping insertion in model container [2023-11-24 23:56:58,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:58" (1/1) ... [2023-11-24 23:56:58,998 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:56:59,447 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_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4493,4506] [2023-11-24 23:56:59,460 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_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4553,4566] [2023-11-24 23:57:00,923 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,929 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,930 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,931 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,933 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,949 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,950 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,953 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,954 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,957 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,958 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,959 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:00,960 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:01,759 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:57:01,761 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:57:01,763 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:57:01,765 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:57:01,768 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:57:01,769 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:57:01,770 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:57:01,771 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:57:01,772 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:57:01,773 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:57:02,632 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,634 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,686 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,689 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,700 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,701 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,735 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,737 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,737 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,738 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,739 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,740 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,740 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:57:02,841 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:57:02,858 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_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4493,4506] [2023-11-24 23:57:02,858 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_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/sv-benchmarks/c/aws-c-common/aws_hash_iter_begin_harness.i[4553,4566] [2023-11-24 23:57:02,900 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,901 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,901 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,902 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,903 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,913 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,914 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,915 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,916 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,917 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,917 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:02,954 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:57:02,955 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:57:02,956 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:57:02,957 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:57:02,958 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:57:02,958 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:57:02,959 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:57:02,960 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:57:02,960 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:57:02,961 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:57:02,999 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-11-24 23:57:03,109 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,110 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,122 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,123 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,195 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,195 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,204 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,213 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,214 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,214 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,214 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,215 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,215 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:57:03,242 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:57:03,592 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,592 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,593 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,593 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,593 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,593 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,593 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,593 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,594 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,594 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,594 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,594 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,594 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,595 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,595 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,595 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,595 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,595 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:57:03,604 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:57:03,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03 WrapperNode [2023-11-24 23:57:03,606 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:57:03,607 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:57:03,608 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:57:03,609 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:57:03,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,754 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,828 INFO L138 Inliner]: procedures = 772, calls = 2447, calls flagged for inlining = 67, calls inlined = 11, statements flattened = 623 [2023-11-24 23:57:03,829 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:57:03,830 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:57:03,830 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:57:03,830 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:57:03,840 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,840 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,847 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,848 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,888 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,893 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,903 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,910 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,923 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:57:03,924 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:57:03,925 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:57:03,925 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:57:03,925 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (1/1) ... [2023-11-24 23:57:03,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:57:03,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:03,970 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:57:03,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:57:04,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-24 23:57:04,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:57:04,018 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-24 23:57:04,018 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-24 23:57:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:57:04,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:57:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-24 23:57:04,019 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-24 23:57:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:57:04,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:57:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:57:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:57:04,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:57:04,020 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-24 23:57:04,021 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-24 23:57:04,021 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-24 23:57:04,021 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-24 23:57:04,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-24 23:57:04,022 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-24 23:57:04,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:57:04,023 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-24 23:57:04,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-24 23:57:04,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:57:04,023 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-24 23:57:04,023 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-24 23:57:04,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:57:04,024 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-24 23:57:04,024 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-24 23:57:04,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:57:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_begin [2023-11-24 23:57:04,025 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_begin [2023-11-24 23:57:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-24 23:57:04,025 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-24 23:57:04,025 INFO L130 BoogieDeclarations]: Found specification of procedure s_get_next_element [2023-11-24 23:57:04,026 INFO L138 BoogieDeclarations]: Found implementation of procedure s_get_next_element [2023-11-24 23:57:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:57:04,026 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:57:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-11-24 23:57:04,026 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-11-24 23:57:04,026 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-24 23:57:04,027 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-24 23:57:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:57:04,027 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-24 23:57:04,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-24 23:57:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-24 23:57:04,028 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-24 23:57:04,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:57:04,486 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:57:04,503 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:57:04,643 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !true; [2023-11-24 23:57:05,604 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:57:05,868 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:57:05,868 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-24 23:57:05,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:57:05 BoogieIcfgContainer [2023-11-24 23:57:05,870 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:57:05,873 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:57:05,873 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:57:05,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:57:05,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:56:58" (1/3) ... [2023-11-24 23:57:05,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89c91b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:57:05, skipping insertion in model container [2023-11-24 23:57:05,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:57:03" (2/3) ... [2023-11-24 23:57:05,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89c91b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:57:05, skipping insertion in model container [2023-11-24 23:57:05,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:57:05" (3/3) ... [2023-11-24 23:57:05,879 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_begin_harness.i [2023-11-24 23:57:05,898 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:57:05,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:57:05,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:57:06,006 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;@3032a6cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:57:06,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:57:06,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 73 states have internal predecessors, (88), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-24 23:57:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-24 23:57:06,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:06,035 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2023-11-24 23:57:06,036 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:57:06,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:06,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1720379481, now seen corresponding path program 1 times [2023-11-24 23:57:06,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:06,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621629928] [2023-11-24 23:57:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:06,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:06,502 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:57:06,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309211930] [2023-11-24 23:57:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:06,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:06,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:06,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:57:06,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:57:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:07,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 23:57:07,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:57:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-24 23:57:07,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:57:07,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:07,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621629928] [2023-11-24 23:57:07,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:57:07,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309211930] [2023-11-24 23:57:07,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309211930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:07,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:07,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:57:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52662873] [2023-11-24 23:57:07,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 23:57:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:07,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 23:57:07,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:57:07,471 INFO L87 Difference]: Start difference. First operand has 131 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 73 states have internal predecessors, (88), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-24 23:57:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:07,742 INFO L93 Difference]: Finished difference Result 199 states and 263 transitions. [2023-11-24 23:57:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 23:57:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 110 [2023-11-24 23:57:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:07,755 INFO L225 Difference]: With dead ends: 199 [2023-11-24 23:57:07,755 INFO L226 Difference]: Without dead ends: 129 [2023-11-24 23:57:07,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 23:57:07,762 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:07,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 141 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 23:57:07,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-24 23:57:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-24 23:57:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 72 states have internal predecessors, (83), 40 states have call successors, (40), 17 states have call predecessors, (40), 17 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-24 23:57:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 162 transitions. [2023-11-24 23:57:07,816 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 162 transitions. Word has length 110 [2023-11-24 23:57:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:07,818 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 162 transitions. [2023-11-24 23:57:07,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-24 23:57:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 162 transitions. [2023-11-24 23:57:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-24 23:57:07,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:07,823 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2023-11-24 23:57:07,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:57:08,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-24 23:57:08,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:57:08,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:08,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1776813923, now seen corresponding path program 1 times [2023-11-24 23:57:08,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:08,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454500439] [2023-11-24 23:57:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:08,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:08,249 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:57:08,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425023354] [2023-11-24 23:57:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:08,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:08,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:08,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:57:08,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:57:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:08,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 2532 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:57:09,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:57:09,298 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-11-24 23:57:09,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:57:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-11-24 23:57:09,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:09,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454500439] [2023-11-24 23:57:09,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:57:09,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425023354] [2023-11-24 23:57:09,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425023354] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:57:09,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:57:09,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-11-24 23:57:09,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300216769] [2023-11-24 23:57:09,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:09,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:57:09,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:57:09,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-24 23:57:09,687 INFO L87 Difference]: Start difference. First operand 129 states and 162 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-24 23:57:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:10,584 INFO L93 Difference]: Finished difference Result 178 states and 223 transitions. [2023-11-24 23:57:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:57:10,585 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) Word has length 115 [2023-11-24 23:57:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:10,590 INFO L225 Difference]: With dead ends: 178 [2023-11-24 23:57:10,591 INFO L226 Difference]: Without dead ends: 131 [2023-11-24 23:57:10,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-24 23:57:10,593 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 143 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:10,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 677 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:57:10,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-24 23:57:10,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-24 23:57:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 40 states have call successors, (40), 17 states have call predecessors, (40), 18 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2023-11-24 23:57:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 164 transitions. [2023-11-24 23:57:10,624 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 164 transitions. Word has length 115 [2023-11-24 23:57:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:10,625 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 164 transitions. [2023-11-24 23:57:10,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 5 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 5 states have call predecessors, (21), 4 states have call successors, (21) [2023-11-24 23:57:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 164 transitions. [2023-11-24 23:57:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-24 23:57:10,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:10,636 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2023-11-24 23:57:10,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:57:10,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:10,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:57:10,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:10,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1123294007, now seen corresponding path program 1 times [2023-11-24 23:57:10,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:10,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957360892] [2023-11-24 23:57:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:10,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:10,976 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:57:10,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107690490] [2023-11-24 23:57:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:10,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:10,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:10,978 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:57:11,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:57:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:11,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:57:11,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:57:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-24 23:57:11,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:57:11,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:11,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957360892] [2023-11-24 23:57:11,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:57:11,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107690490] [2023-11-24 23:57:11,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107690490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:11,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:57:11,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:57:11,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238516038] [2023-11-24 23:57:11,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:11,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:57:11,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:11,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:57:11,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:57:11,794 INFO L87 Difference]: Start difference. First operand 131 states and 164 transitions. Second operand has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-24 23:57:12,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:12,283 INFO L93 Difference]: Finished difference Result 256 states and 321 transitions. [2023-11-24 23:57:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:57:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 116 [2023-11-24 23:57:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:12,287 INFO L225 Difference]: With dead ends: 256 [2023-11-24 23:57:12,287 INFO L226 Difference]: Without dead ends: 135 [2023-11-24 23:57:12,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:57:12,290 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:12,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 548 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:57:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-24 23:57:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-24 23:57:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 40 states have call successors, (40), 17 states have call predecessors, (40), 19 states have return successors, (41), 40 states have call predecessors, (41), 39 states have call successors, (41) [2023-11-24 23:57:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2023-11-24 23:57:12,320 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 116 [2023-11-24 23:57:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:12,320 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2023-11-24 23:57:12,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 13.25) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-24 23:57:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2023-11-24 23:57:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-24 23:57:12,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:12,329 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 23:57:12,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:57:12,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:12,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:57:12,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash -945624423, now seen corresponding path program 1 times [2023-11-24 23:57:12,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:12,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617521101] [2023-11-24 23:57:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:12,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-24 23:57:15,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:15,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617521101] [2023-11-24 23:57:15,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617521101] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:57:15,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270219136] [2023-11-24 23:57:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:15,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:15,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:15,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:57:15,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:57:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:15,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 23:57:15,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:57:16,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-24 23:57:16,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2023-11-24 23:57:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-24 23:57:16,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:57:16,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270219136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:16,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:57:16,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [8] total 21 [2023-11-24 23:57:16,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591370564] [2023-11-24 23:57:16,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:16,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 23:57:16,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 23:57:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:57:16,754 INFO L87 Difference]: Start difference. First operand 135 states and 168 transitions. Second operand has 15 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-24 23:57:19,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:22,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:24,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-24 23:57:26,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:28,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:30,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:32,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:34,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:36,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:38,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:40,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:42,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:44,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:46,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 23:57:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:57:48,510 INFO L93 Difference]: Finished difference Result 249 states and 303 transitions. [2023-11-24 23:57:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-24 23:57:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 124 [2023-11-24 23:57:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:57:48,514 INFO L225 Difference]: With dead ends: 249 [2023-11-24 23:57:48,514 INFO L226 Difference]: Without dead ends: 200 [2023-11-24 23:57:48,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2023-11-24 23:57:48,517 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 119 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 56 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:57:48,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1050 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 883 Invalid, 14 Unknown, 0 Unchecked, 31.3s Time] [2023-11-24 23:57:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-24 23:57:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2023-11-24 23:57:48,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 111 states have (on average 1.1711711711711712) internal successors, (130), 115 states have internal predecessors, (130), 53 states have call successors, (53), 26 states have call predecessors, (53), 31 states have return successors, (56), 54 states have call predecessors, (56), 51 states have call successors, (56) [2023-11-24 23:57:48,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions. [2023-11-24 23:57:48,549 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 124 [2023-11-24 23:57:48,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:57:48,550 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 239 transitions. [2023-11-24 23:57:48,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 8 states have call successors, (25), 6 states have call predecessors, (25), 3 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-11-24 23:57:48,550 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions. [2023-11-24 23:57:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-24 23:57:48,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:57:48,552 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-24 23:57:48,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:57:48,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:48,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:57:48,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:57:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2074964991, now seen corresponding path program 1 times [2023-11-24 23:57:48,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:57:48,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126640361] [2023-11-24 23:57:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:48,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:57:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-24 23:57:50,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:57:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126640361] [2023-11-24 23:57:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126640361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:57:50,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326833325] [2023-11-24 23:57:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:57:50,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:57:50,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:57:50,900 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:57:50,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafaa2d1-f4fc-440b-a630-c9bdd0ba8b4e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:57:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:57:51,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 23:57:51,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:57:51,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 23:57:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-24 23:57:52,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:57:52,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326833325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:57:52,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:57:52,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2023-11-24 23:57:52,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933316206] [2023-11-24 23:57:52,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:57:52,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 23:57:52,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:57:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 23:57:52,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-24 23:57:52,286 INFO L87 Difference]: Start difference. First operand 196 states and 239 transitions. Second operand has 9 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (28), 3 states have call predecessors, (28), 4 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26)