./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_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_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/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_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/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_f90c564b-2777-4eda-b4a0-195fa65013f5/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 44162e1142387f3513ac3cf9af71d3c7aa6399e99cd364d08a07ceb8efc80a41 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:00:15,181 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:00:15,332 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 01:00:15,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:00:15,343 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:00:15,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:00:15,376 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:00:15,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:00:15,378 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:00:15,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:00:15,384 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:00:15,385 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:00:15,385 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:00:15,387 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:00:15,388 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:00:15,388 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:00:15,389 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:00:15,389 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:00:15,390 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:00:15,390 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:00:15,391 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:00:15,392 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:00:15,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:00:15,394 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:00:15,394 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:00:15,395 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:00:15,395 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:00:15,396 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:00:15,396 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:00:15,397 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:00:15,398 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:00:15,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:00:15,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:00:15,399 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:15,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:00:15,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:00:15,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:00:15,400 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:00:15,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:00:15,401 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:00:15,401 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:00:15,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:00:15,402 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_f90c564b-2777-4eda-b4a0-195fa65013f5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44162e1142387f3513ac3cf9af71d3c7aa6399e99cd364d08a07ceb8efc80a41 [2023-11-12 01:00:15,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:00:15,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:00:15,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:00:15,800 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:00:15,801 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:00:15,802 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i [2023-11-12 01:00:19,060 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:00:19,708 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:00:19,710 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i [2023-11-12 01:00:19,765 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/data/4ba8d9c2b/132b230db5c54fa798d1218e38f2088f/FLAG29d90c9a2 [2023-11-12 01:00:19,783 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/data/4ba8d9c2b/132b230db5c54fa798d1218e38f2088f [2023-11-12 01:00:19,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:00:19,791 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:00:19,797 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:19,797 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:00:19,803 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:00:19,804 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:19" (1/1) ... [2023-11-12 01:00:19,805 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d57fd47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:19, skipping insertion in model container [2023-11-12 01:00:19,805 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:00:19" (1/1) ... [2023-11-12 01:00:20,031 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:00:20,378 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_f90c564b-2777-4eda-b4a0-195fa65013f5/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i[4496,4509] [2023-11-12 01:00:20,387 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_f90c564b-2777-4eda-b4a0-195fa65013f5/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i[4556,4569] [2023-11-12 01:00:21,578 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,583 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,584 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,586 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,588 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,612 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,617 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,619 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,621 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,624 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,628 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,629 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:21,629 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,157 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 01:00:22,158 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 01:00:22,159 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 01:00:22,160 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 01:00:22,162 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 01:00:22,163 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 01:00:22,164 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 01:00:22,164 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 01:00:22,165 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 01:00:22,166 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 01:00:22,853 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,855 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,897 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,903 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,911 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,912 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,936 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,938 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,939 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,939 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,940 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,940 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:22,941 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:23,075 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:00:23,107 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_f90c564b-2777-4eda-b4a0-195fa65013f5/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i[4496,4509] [2023-11-12 01:00:23,109 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_f90c564b-2777-4eda-b4a0-195fa65013f5/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i[4556,4569] [2023-11-12 01:00:23,183 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,184 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,184 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,185 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,188 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,199 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,201 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,205 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,206 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,207 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,208 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,209 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,209 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,255 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-12 01:00:23,256 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-12 01:00:23,257 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-12 01:00:23,259 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-12 01:00:23,260 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-12 01:00:23,262 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-12 01:00:23,262 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-12 01:00:23,264 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-12 01:00:23,265 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-12 01:00:23,266 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-12 01:00:23,325 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-11-12 01:00:23,553 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,554 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,565 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,566 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,570 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,571 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,590 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,591 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,592 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,593 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,593 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,595 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,595 WARN L1577 CHandler]: Possible shadowing of function index [2023-11-12 01:00:23,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:00:24,052 WARN L672 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,052 WARN L672 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,052 WARN L672 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,052 WARN L672 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,053 WARN L672 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,053 WARN L672 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,053 WARN L672 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,053 WARN L672 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,053 WARN L672 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,053 WARN L672 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,054 WARN L672 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,054 WARN L672 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,054 WARN L672 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,054 WARN L672 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,054 WARN L672 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,054 WARN L672 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,054 WARN L672 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,055 WARN L672 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 01:00:24,063 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:00:24,063 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24 WrapperNode [2023-11-12 01:00:24,063 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:00:24,065 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:24,065 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:00:24,065 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:00:24,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,205 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,368 INFO L138 Inliner]: procedures = 773, calls = 2436, calls flagged for inlining = 69, calls inlined = 18, statements flattened = 964 [2023-11-12 01:00:24,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:00:24,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:00:24,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:00:24,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:00:24,393 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,393 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,412 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,413 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,489 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,538 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,576 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:00:24,577 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:00:24,578 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:00:24,578 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:00:24,579 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (1/1) ... [2023-11-12 01:00:24,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:00:24,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:24,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:00:24,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:00:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-12 01:00:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 01:00:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-12 01:00:24,671 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-12 01:00:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-12 01:00:24,673 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-12 01:00:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-12 01:00:24,673 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-12 01:00:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 01:00:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:00:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 01:00:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:00:24,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:00:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-12 01:00:24,674 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-12 01:00:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-12 01:00:24,675 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-12 01:00:24,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-12 01:00:24,676 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-12 01:00:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 01:00:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-12 01:00:24,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-12 01:00:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 01:00:24,677 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-12 01:00:24,678 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-12 01:00:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 01:00:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-12 01:00:24,678 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-12 01:00:24,678 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-11-12 01:00:24,678 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-11-12 01:00:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 01:00:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-12 01:00:24,679 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-12 01:00:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 01:00:24,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 01:00:24,679 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-11-12 01:00:24,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-11-12 01:00:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure s_get_next_element [2023-11-12 01:00:24,680 INFO L138 BoogieDeclarations]: Found implementation of procedure s_get_next_element [2023-11-12 01:00:24,681 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 01:00:24,681 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 01:00:24,681 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_int [2023-11-12 01:00:24,681 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_int [2023-11-12 01:00:24,681 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-11-12 01:00:24,681 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-11-12 01:00:24,682 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-12 01:00:24,683 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-12 01:00:24,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 01:00:24,683 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-12 01:00:24,683 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-12 01:00:24,684 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-12 01:00:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-12 01:00:24,684 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2023-11-12 01:00:24,684 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2023-11-12 01:00:24,684 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 01:00:24,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 01:00:24,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:00:25,140 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:00:25,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:00:25,536 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2023-11-12 01:00:25,536 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true; [2023-11-12 01:00:26,721 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !true; [2023-11-12 01:00:26,748 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:00:27,124 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:00:27,124 INFO L302 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-12 01:00:27,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:27 BoogieIcfgContainer [2023-11-12 01:00:27,134 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:00:27,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:00:27,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:00:27,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:00:27,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:00:19" (1/3) ... [2023-11-12 01:00:27,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496a4eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:27, skipping insertion in model container [2023-11-12 01:00:27,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:00:24" (2/3) ... [2023-11-12 01:00:27,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496a4eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:00:27, skipping insertion in model container [2023-11-12 01:00:27,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:00:27" (3/3) ... [2023-11-12 01:00:27,146 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_foreach_harness.i [2023-11-12 01:00:27,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:00:27,168 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:00:27,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:00:27,250 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;@13a7fb19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:00:27,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:00:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 128 states have (on average 1.2265625) internal successors, (157), 125 states have internal predecessors, (157), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-12 01:00:27,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-12 01:00:27,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:27,274 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:27,275 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:27,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:27,283 INFO L85 PathProgramCache]: Analyzing trace with hash -611737933, now seen corresponding path program 1 times [2023-11-12 01:00:27,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:27,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608495006] [2023-11-12 01:00:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:27,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:27,760 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:27,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790308691] [2023-11-12 01:00:27,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:27,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:27,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:27,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:27,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:00:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:28,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 2316 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 01:00:28,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 01:00:28,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:28,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:28,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608495006] [2023-11-12 01:00:28,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:28,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790308691] [2023-11-12 01:00:28,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790308691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:28,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:28,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 01:00:28,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300090370] [2023-11-12 01:00:28,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:28,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 01:00:28,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:28,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 01:00:28,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:00:28,690 INFO L87 Difference]: Start difference. First operand has 229 states, 128 states have (on average 1.2265625) internal successors, (157), 125 states have internal predecessors, (157), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-12 01:00:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:29,007 INFO L93 Difference]: Finished difference Result 405 states and 592 transitions. [2023-11-12 01:00:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 01:00:29,010 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 87 [2023-11-12 01:00:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:29,022 INFO L225 Difference]: With dead ends: 405 [2023-11-12 01:00:29,022 INFO L226 Difference]: Without dead ends: 227 [2023-11-12 01:00:29,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 01:00:29,032 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:29,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 01:00:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-12 01:00:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-11-12 01:00:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 124 states have internal predecessors, (146), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-12 01:00:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 307 transitions. [2023-11-12 01:00:29,125 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 307 transitions. Word has length 87 [2023-11-12 01:00:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:29,127 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 307 transitions. [2023-11-12 01:00:29,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-12 01:00:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 307 transitions. [2023-11-12 01:00:29,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-12 01:00:29,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:29,139 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:29,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:29,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 01:00:29,349 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:29,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:29,350 INFO L85 PathProgramCache]: Analyzing trace with hash -879226267, now seen corresponding path program 1 times [2023-11-12 01:00:29,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:29,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528348439] [2023-11-12 01:00:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:29,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:29,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:29,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907370448] [2023-11-12 01:00:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:29,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:29,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:29,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:00:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:30,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 2344 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:00:30,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 01:00:30,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:00:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-12 01:00:30,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528348439] [2023-11-12 01:00:30,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907370448] [2023-11-12 01:00:30,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907370448] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:30,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:30,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-11-12 01:00:30,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984333779] [2023-11-12 01:00:30,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:30,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:00:30,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:30,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:00:30,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-12 01:00:30,938 INFO L87 Difference]: Start difference. First operand 227 states and 307 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-12 01:00:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:32,258 INFO L93 Difference]: Finished difference Result 411 states and 571 transitions. [2023-11-12 01:00:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 01:00:32,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 92 [2023-11-12 01:00:32,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:32,265 INFO L225 Difference]: With dead ends: 411 [2023-11-12 01:00:32,265 INFO L226 Difference]: Without dead ends: 242 [2023-11-12 01:00:32,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:00:32,268 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 309 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:32,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1182 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-12 01:00:32,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-12 01:00:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2023-11-12 01:00:32,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 133 states have internal predecessors, (156), 86 states have call successors, (86), 23 states have call predecessors, (86), 24 states have return successors, (92), 85 states have call predecessors, (92), 85 states have call successors, (92) [2023-11-12 01:00:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 334 transitions. [2023-11-12 01:00:32,310 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 334 transitions. Word has length 92 [2023-11-12 01:00:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:32,311 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 334 transitions. [2023-11-12 01:00:32,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-12 01:00:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 334 transitions. [2023-11-12 01:00:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-12 01:00:32,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:32,314 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:32,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 01:00:32,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:32,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:32,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:32,524 INFO L85 PathProgramCache]: Analyzing trace with hash -193348888, now seen corresponding path program 1 times [2023-11-12 01:00:32,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:32,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273655260] [2023-11-12 01:00:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:32,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:32,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 01:00:32,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365641068] [2023-11-12 01:00:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:32,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:32,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:32,666 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:32,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:00:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:33,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 2349 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 01:00:33,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-12 01:00:33,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:33,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:33,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273655260] [2023-11-12 01:00:33,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 01:00:33,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365641068] [2023-11-12 01:00:33,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365641068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:33,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:33,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:00:33,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535380945] [2023-11-12 01:00:33,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:33,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:00:33,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:33,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:00:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:00:33,441 INFO L87 Difference]: Start difference. First operand 242 states and 334 transitions. Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-12 01:00:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:34,071 INFO L93 Difference]: Finished difference Result 452 states and 630 transitions. [2023-11-12 01:00:34,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:00:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 93 [2023-11-12 01:00:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:34,075 INFO L225 Difference]: With dead ends: 452 [2023-11-12 01:00:34,075 INFO L226 Difference]: Without dead ends: 246 [2023-11-12 01:00:34,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 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 01:00:34,078 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:34,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1052 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 01:00:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-12 01:00:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2023-11-12 01:00:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 136 states have internal predecessors, (159), 86 states have call successors, (86), 23 states have call predecessors, (86), 25 states have return successors, (93), 86 states have call predecessors, (93), 85 states have call successors, (93) [2023-11-12 01:00:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 338 transitions. [2023-11-12 01:00:34,115 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 338 transitions. Word has length 93 [2023-11-12 01:00:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:34,115 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 338 transitions. [2023-11-12 01:00:34,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-12 01:00:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 338 transitions. [2023-11-12 01:00:34,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-12 01:00:34,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:34,118 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:34,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:34,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:34,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:34,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1508699729, now seen corresponding path program 1 times [2023-11-12 01:00:34,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:34,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679301378] [2023-11-12 01:00:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:34,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-12 01:00:37,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:37,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679301378] [2023-11-12 01:00:37,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679301378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:37,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:37,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-12 01:00:37,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598179468] [2023-11-12 01:00:37,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:37,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 01:00:37,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 01:00:37,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-12 01:00:37,325 INFO L87 Difference]: Start difference. First operand 246 states and 338 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-12 01:00:39,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:39,257 INFO L93 Difference]: Finished difference Result 423 states and 595 transitions. [2023-11-12 01:00:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 01:00:39,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 97 [2023-11-12 01:00:39,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:39,261 INFO L225 Difference]: With dead ends: 423 [2023-11-12 01:00:39,261 INFO L226 Difference]: Without dead ends: 248 [2023-11-12 01:00:39,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-12 01:00:39,264 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 60 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 2003 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:39,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 2003 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-12 01:00:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-12 01:00:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2023-11-12 01:00:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1851851851851851) internal successors, (160), 138 states have internal predecessors, (160), 86 states have call successors, (86), 23 states have call predecessors, (86), 26 states have return successors, (101), 86 states have call predecessors, (101), 85 states have call successors, (101) [2023-11-12 01:00:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 347 transitions. [2023-11-12 01:00:39,303 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 347 transitions. Word has length 97 [2023-11-12 01:00:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:39,304 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 347 transitions. [2023-11-12 01:00:39,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 6 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2023-11-12 01:00:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 347 transitions. [2023-11-12 01:00:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-12 01:00:39,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:39,307 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:39,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:00:39,308 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:39,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:39,308 INFO L85 PathProgramCache]: Analyzing trace with hash -570523471, now seen corresponding path program 1 times [2023-11-12 01:00:39,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:39,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503200781] [2023-11-12 01:00:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:39,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-12 01:00:42,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:42,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503200781] [2023-11-12 01:00:42,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503200781] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:42,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:00:42,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-12 01:00:42,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647174467] [2023-11-12 01:00:42,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:42,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 01:00:42,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:42,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 01:00:42,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-12 01:00:42,028 INFO L87 Difference]: Start difference. First operand 248 states and 347 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-12 01:00:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:44,535 INFO L93 Difference]: Finished difference Result 428 states and 607 transitions. [2023-11-12 01:00:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 01:00:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 101 [2023-11-12 01:00:44,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:44,539 INFO L225 Difference]: With dead ends: 428 [2023-11-12 01:00:44,539 INFO L226 Difference]: Without dead ends: 256 [2023-11-12 01:00:44,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-12 01:00:44,541 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 209 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:44,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 902 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 01:00:44,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-12 01:00:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 246. [2023-11-12 01:00:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 136 states have internal predecessors, (159), 86 states have call successors, (86), 23 states have call predecessors, (86), 25 states have return successors, (93), 86 states have call predecessors, (93), 85 states have call successors, (93) [2023-11-12 01:00:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 338 transitions. [2023-11-12 01:00:44,575 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 338 transitions. Word has length 101 [2023-11-12 01:00:44,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:44,576 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 338 transitions. [2023-11-12 01:00:44,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 6 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2023-11-12 01:00:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 338 transitions. [2023-11-12 01:00:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 01:00:44,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:44,578 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:44,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:00:44,579 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:44,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:44,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1358493337, now seen corresponding path program 1 times [2023-11-12 01:00:44,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:44,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645458227] [2023-11-12 01:00:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:44,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-12 01:00:49,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:49,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645458227] [2023-11-12 01:00:49,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645458227] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:49,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145316708] [2023-11-12 01:00:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:49,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:49,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:49,394 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:49,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:00:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:50,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 2366 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-12 01:00:50,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-12 01:00:50,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:50,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145316708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:50,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:50,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [17] total 22 [2023-11-12 01:00:50,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519866089] [2023-11-12 01:00:50,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:50,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 01:00:50,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 01:00:50,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-11-12 01:00:50,348 INFO L87 Difference]: Start difference. First operand 246 states and 338 transitions. Second operand has 7 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 01:00:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:00:52,035 INFO L93 Difference]: Finished difference Result 442 states and 621 transitions. [2023-11-12 01:00:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 01:00:52,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 103 [2023-11-12 01:00:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:00:52,038 INFO L225 Difference]: With dead ends: 442 [2023-11-12 01:00:52,039 INFO L226 Difference]: Without dead ends: 248 [2023-11-12 01:00:52,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2023-11-12 01:00:52,041 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 243 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-12 01:00:52,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 641 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-12 01:00:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-12 01:00:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2023-11-12 01:00:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1851851851851851) internal successors, (160), 138 states have internal predecessors, (160), 86 states have call successors, (86), 23 states have call predecessors, (86), 26 states have return successors, (98), 86 states have call predecessors, (98), 85 states have call successors, (98) [2023-11-12 01:00:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 344 transitions. [2023-11-12 01:00:52,071 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 344 transitions. Word has length 103 [2023-11-12 01:00:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:00:52,072 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 344 transitions. [2023-11-12 01:00:52,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 12.0) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-12 01:00:52,073 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 344 transitions. [2023-11-12 01:00:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-12 01:00:52,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:00:52,075 INFO L195 NwaCegarLoop]: trace histogram [8, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:00:52,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:00:52,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 01:00:52,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:00:52,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:00:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1842926213, now seen corresponding path program 1 times [2023-11-12 01:00:52,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:00:52,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475639157] [2023-11-12 01:00:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:52,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:00:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-12 01:00:53,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:00:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475639157] [2023-11-12 01:00:53,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475639157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:00:53,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211468441] [2023-11-12 01:00:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:00:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:00:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:00:53,820 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:00:53,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f90c564b-2777-4eda-b4a0-195fa65013f5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:00:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:00:54,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 2390 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-12 01:00:54,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:00:54,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 01:00:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 01:00:55,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:00:55,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211468441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:00:55,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:00:55,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2023-11-12 01:00:55,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527922383] [2023-11-12 01:00:55,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:00:55,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 01:00:55,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:00:55,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 01:00:55,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-11-12 01:00:55,180 INFO L87 Difference]: Start difference. First operand 248 states and 344 transitions. Second operand has 12 states, 9 states have (on average 5.666666666666667) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (24), 3 states have call predecessors, (24), 5 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-11-12 01:00:59,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-12 01:01:01,480 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]