./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d272ef4205faaf8a4fc383ce66c2e1d6fd3542c1bcb99550bb82ad72fa2d6d83 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:14:27,288 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:14:27,411 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-24 23:14:27,422 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:14:27,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:14:27,462 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:14:27,463 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:14:27,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:14:27,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:14:27,470 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:14:27,470 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:14:27,471 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:14:27,471 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:14:27,473 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:14:27,473 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:14:27,473 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:14:27,474 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:14:27,474 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:14:27,475 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:14:27,475 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:14:27,476 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:14:27,476 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:14:27,477 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:14:27,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:14:27,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:14:27,478 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:14:27,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:14:27,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:14:27,480 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:14:27,480 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:14:27,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:14:27,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:14:27,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:14:27,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:14:27,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:14:27,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:14:27,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:14:27,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:14:27,483 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:14:27,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:14:27,484 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:14:27,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:14:27,484 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:14:27,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:14:27,485 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_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d272ef4205faaf8a4fc383ce66c2e1d6fd3542c1bcb99550bb82ad72fa2d6d83 [2023-11-24 23:14:27,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:14:27,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:14:27,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:14:27,786 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:14:27,787 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:14:27,788 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness_negated.i [2023-11-24 23:14:30,903 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:14:31,513 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:14:31,514 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness_negated.i [2023-11-24 23:14:31,559 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/data/ad5a40105/bc9b3af1bc0940ccb7c812fe2a60674e/FLAG53c8a87c3 [2023-11-24 23:14:31,575 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/data/ad5a40105/bc9b3af1bc0940ccb7c812fe2a60674e [2023-11-24 23:14:31,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:14:31,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:14:31,581 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:14:31,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:14:31,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:14:31,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:14:31" (1/1) ... [2023-11-24 23:14:31,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e38b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:31, skipping insertion in model container [2023-11-24 23:14:31,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:14:31" (1/1) ... [2023-11-24 23:14:31,773 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:14:32,117 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_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness_negated.i[4497,4510] [2023-11-24 23:14:32,127 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_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness_negated.i[4557,4570] [2023-11-24 23:14:33,441 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,444 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,446 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,464 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,464 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,467 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,467 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,470 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,471 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,472 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:33,473 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,073 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:14:34,075 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:14:34,076 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:14:34,078 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:14:34,080 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:14:34,081 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:14:34,088 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:14:34,089 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:14:34,090 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:14:34,091 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:14:34,772 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,773 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,811 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,814 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,822 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,823 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,848 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,850 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,851 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,851 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,852 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,860 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,861 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:34,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:14:34,970 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:14:34,996 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_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness_negated.i[4497,4510] [2023-11-24 23:14:34,996 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_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness_negated.i[4557,4570] [2023-11-24 23:14:35,047 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,048 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,049 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,055 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,057 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,058 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,059 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,060 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,061 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,061 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,062 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,103 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-24 23:14:35,107 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-24 23:14:35,108 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-24 23:14:35,109 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-24 23:14:35,110 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-24 23:14:35,111 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-24 23:14:35,112 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-24 23:14:35,113 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-24 23:14:35,114 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-24 23:14:35,116 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-24 23:14:35,170 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7553-7564] [2023-11-24 23:14:35,329 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,330 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,340 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,341 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,344 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,345 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,360 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,361 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,361 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,362 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,363 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,363 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,364 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-24 23:14:35,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:14:35,683 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,683 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,683 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,684 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,684 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,684 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,684 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,684 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,684 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,684 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,685 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,685 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,685 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,685 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,685 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,685 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,686 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,686 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 23:14:35,694 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:14:35,695 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35 WrapperNode [2023-11-24 23:14:35,695 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:14:35,696 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:14:35,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:14:35,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:14:35,704 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:35,852 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:35,958 INFO L138 Inliner]: procedures = 773, calls = 2446, calls flagged for inlining = 71, calls inlined = 16, statements flattened = 713 [2023-11-24 23:14:35,958 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:14:35,959 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:14:35,959 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:14:35,959 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:14:35,969 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:35,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:35,990 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:35,991 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:36,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:36,063 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:36,089 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:36,133 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:36,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:14:36,153 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:14:36,154 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:14:36,154 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:14:36,155 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (1/1) ... [2023-11-24 23:14:36,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:14:36,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:14:36,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:14:36,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:14:36,245 INFO L130 BoogieDeclarations]: Found specification of procedure memset_override_0_impl [2023-11-24 23:14:36,245 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_override_0_impl [2023-11-24 23:14:36,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-24 23:14:36,246 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-24 23:14:36,246 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-24 23:14:36,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:14:36,246 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-24 23:14:36,246 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-24 23:14:36,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-24 23:14:36,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-24 23:14:36,247 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-24 23:14:36,247 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-24 23:14:36,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 23:14:36,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:14:36,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 23:14:36,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:14:36,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:14:36,249 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-24 23:14:36,249 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-24 23:14:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-24 23:14:36,250 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-24 23:14:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-11-24 23:14:36,250 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-11-24 23:14:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:14:36,250 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-24 23:14:36,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-24 23:14:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 23:14:36,251 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-24 23:14:36,251 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-24 23:14:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:14:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-24 23:14:36,252 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-24 23:14:36,252 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-24 23:14:36,252 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-24 23:14:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:14:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-24 23:14:36,253 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-24 23:14:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-24 23:14:36,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-24 23:14:36,253 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-24 23:14:36,254 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-24 23:14:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-24 23:14:36,254 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-24 23:14:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-24 23:14:36,254 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-24 23:14:36,255 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-24 23:14:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-24 23:14:36,255 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-24 23:14:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-24 23:14:36,255 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-24 23:14:36,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:14:36,679 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:14:36,683 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:14:37,732 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:14:37,917 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:14:37,920 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:14:37,922 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:14:37 BoogieIcfgContainer [2023-11-24 23:14:37,922 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:14:37,925 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:14:37,926 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:14:37,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:14:37,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:14:31" (1/3) ... [2023-11-24 23:14:37,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2525cf51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:14:37, skipping insertion in model container [2023-11-24 23:14:37,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:14:35" (2/3) ... [2023-11-24 23:14:37,940 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2525cf51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:14:37, skipping insertion in model container [2023-11-24 23:14:37,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:14:37" (3/3) ... [2023-11-24 23:14:37,944 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_clean_up_harness_negated.i [2023-11-24 23:14:37,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:14:37,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:14:38,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:14:38,053 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;@5ddd5cbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:14:38,054 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:14:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 47 states have call successors, (47), 19 states have call predecessors, (47), 19 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-24 23:14:38,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-24 23:14:38,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:38,080 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:38,081 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:38,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:38,089 INFO L85 PathProgramCache]: Analyzing trace with hash -210544842, now seen corresponding path program 1 times [2023-11-24 23:14:38,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:38,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131881153] [2023-11-24 23:14:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:38,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:14:38,616 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-24 23:14:38,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [765835381] [2023-11-24 23:14:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:38,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:14:38,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:14:38,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:14:38,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:14:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:39,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 2277 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:14:39,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:14:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-24 23:14:39,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:14:39,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:14:39,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131881153] [2023-11-24 23:14:39,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-24 23:14:39,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765835381] [2023-11-24 23:14:39,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765835381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:39,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:14:39,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:14:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873720361] [2023-11-24 23:14:39,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:39,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:14:39,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:14:39,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:14:39,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:14:39,567 INFO L87 Difference]: Start difference. First operand has 156 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 47 states have call successors, (47), 19 states have call predecessors, (47), 19 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-24 23:14:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:14:40,165 INFO L93 Difference]: Finished difference Result 282 states and 369 transitions. [2023-11-24 23:14:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:14:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 94 [2023-11-24 23:14:40,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:14:40,178 INFO L225 Difference]: With dead ends: 282 [2023-11-24 23:14:40,179 INFO L226 Difference]: Without dead ends: 157 [2023-11-24 23:14:40,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:14:40,187 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:14:40,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 668 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:14:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-24 23:14:40,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-11-24 23:14:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 90 states have internal predecessors, (103), 47 states have call successors, (47), 19 states have call predecessors, (47), 20 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2023-11-24 23:14:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 197 transitions. [2023-11-24 23:14:40,251 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 197 transitions. Word has length 94 [2023-11-24 23:14:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:14:40,252 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 197 transitions. [2023-11-24 23:14:40,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-11-24 23:14:40,253 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 197 transitions. [2023-11-24 23:14:40,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-24 23:14:40,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:40,258 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:40,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:14:40,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:14:40,469 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:40,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:40,469 INFO L85 PathProgramCache]: Analyzing trace with hash 401873920, now seen corresponding path program 1 times [2023-11-24 23:14:40,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:40,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320143813] [2023-11-24 23:14:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:40,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:14:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-24 23:14:43,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:14:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320143813] [2023-11-24 23:14:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320143813] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:43,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:14:43,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 23:14:43,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627548549] [2023-11-24 23:14:43,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:43,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:14:43,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:14:43,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:14:43,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:14:43,185 INFO L87 Difference]: Start difference. First operand 157 states and 197 transitions. Second operand has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-24 23:14:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:14:44,056 INFO L93 Difference]: Finished difference Result 266 states and 338 transitions. [2023-11-24 23:14:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 23:14:44,057 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 98 [2023-11-24 23:14:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:14:44,061 INFO L225 Difference]: With dead ends: 266 [2023-11-24 23:14:44,062 INFO L226 Difference]: Without dead ends: 159 [2023-11-24 23:14:44,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 23:14:44,065 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 23:14:44,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1014 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 23:14:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-24 23:14:44,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-11-24 23:14:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 47 states have call successors, (47), 19 states have call predecessors, (47), 21 states have return successors, (50), 47 states have call predecessors, (50), 46 states have call successors, (50) [2023-11-24 23:14:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2023-11-24 23:14:44,091 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 98 [2023-11-24 23:14:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:14:44,091 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2023-11-24 23:14:44,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-11-24 23:14:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2023-11-24 23:14:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-24 23:14:44,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:44,095 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:44,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 23:14:44,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:44,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:44,096 INFO L85 PathProgramCache]: Analyzing trace with hash 414002530, now seen corresponding path program 1 times [2023-11-24 23:14:44,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:44,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874495090] [2023-11-24 23:14:44,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:44,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:14:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-24 23:14:45,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:14:45,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874495090] [2023-11-24 23:14:45,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874495090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:45,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:14:45,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 23:14:45,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492500390] [2023-11-24 23:14:45,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:45,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 23:14:45,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:14:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 23:14:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-24 23:14:45,637 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand has 11 states, 8 states have (on average 5.75) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-24 23:14:47,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:14:47,015 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2023-11-24 23:14:47,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:14:47,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 5.75) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) Word has length 104 [2023-11-24 23:14:47,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:14:47,019 INFO L225 Difference]: With dead ends: 273 [2023-11-24 23:14:47,020 INFO L226 Difference]: Without dead ends: 164 [2023-11-24 23:14:47,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-11-24 23:14:47,022 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 13 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:14:47,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1311 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-24 23:14:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-24 23:14:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2023-11-24 23:14:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 94 states have internal predecessors, (106), 47 states have call successors, (47), 19 states have call predecessors, (47), 22 states have return successors, (51), 48 states have call predecessors, (51), 46 states have call successors, (51) [2023-11-24 23:14:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2023-11-24 23:14:47,043 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 104 [2023-11-24 23:14:47,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:14:47,043 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2023-11-24 23:14:47,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 5.75) internal successors, (46), 10 states have internal predecessors, (46), 5 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 5 states have call predecessors, (23), 5 states have call successors, (23) [2023-11-24 23:14:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2023-11-24 23:14:47,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-24 23:14:47,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:47,046 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:47,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 23:14:47,046 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:47,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:47,047 INFO L85 PathProgramCache]: Analyzing trace with hash -807313651, now seen corresponding path program 1 times [2023-11-24 23:14:47,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:47,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092252005] [2023-11-24 23:14:47,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:47,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:14:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:14:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-24 23:14:54,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:14:54,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092252005] [2023-11-24 23:14:54,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092252005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:14:54,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:14:54,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2023-11-24 23:14:54,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753036234] [2023-11-24 23:14:54,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:14:54,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 23:14:54,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:14:54,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 23:14:54,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2023-11-24 23:14:54,406 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 26 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 16 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2023-11-24 23:14:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:14:59,919 INFO L93 Difference]: Finished difference Result 258 states and 325 transitions. [2023-11-24 23:14:59,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 23:14:59,919 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 16 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) Word has length 108 [2023-11-24 23:14:59,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:14:59,922 INFO L225 Difference]: With dead ends: 258 [2023-11-24 23:14:59,922 INFO L226 Difference]: Without dead ends: 170 [2023-11-24 23:14:59,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2023-11-24 23:14:59,925 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 201 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 2755 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-24 23:14:59,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1123 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2755 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-11-24 23:14:59,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-24 23:14:59,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2023-11-24 23:14:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 99 states have internal predecessors, (111), 48 states have call successors, (48), 21 states have call predecessors, (48), 23 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2023-11-24 23:14:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 211 transitions. [2023-11-24 23:14:59,967 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 211 transitions. Word has length 108 [2023-11-24 23:14:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:14:59,968 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 211 transitions. [2023-11-24 23:14:59,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 16 states have call successors, (25), 3 states have call predecessors, (25), 6 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2023-11-24 23:14:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 211 transitions. [2023-11-24 23:14:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-24 23:14:59,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:14:59,971 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:14:59,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 23:14:59,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:14:59,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:14:59,972 INFO L85 PathProgramCache]: Analyzing trace with hash -342745260, now seen corresponding path program 1 times [2023-11-24 23:14:59,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:14:59,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762266466] [2023-11-24 23:14:59,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:14:59,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-24 23:15:00,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:00,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762266466] [2023-11-24 23:15:00,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762266466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:15:00,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:15:00,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 23:15:00,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838050804] [2023-11-24 23:15:00,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:15:00,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 23:15:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:15:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 23:15:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:15:00,732 INFO L87 Difference]: Start difference. First operand 169 states and 211 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-11-24 23:15:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:15:01,744 INFO L93 Difference]: Finished difference Result 256 states and 318 transitions. [2023-11-24 23:15:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 23:15:01,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 125 [2023-11-24 23:15:01,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:15:01,747 INFO L225 Difference]: With dead ends: 256 [2023-11-24 23:15:01,747 INFO L226 Difference]: Without dead ends: 169 [2023-11-24 23:15:01,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:15:01,749 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 3 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:15:01,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 601 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-24 23:15:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-24 23:15:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-11-24 23:15:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 97 states have (on average 1.134020618556701) internal successors, (110), 99 states have internal predecessors, (110), 48 states have call successors, (48), 21 states have call predecessors, (48), 23 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2023-11-24 23:15:01,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 210 transitions. [2023-11-24 23:15:01,771 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 210 transitions. Word has length 125 [2023-11-24 23:15:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:15:01,772 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 210 transitions. [2023-11-24 23:15:01,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-11-24 23:15:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 210 transitions. [2023-11-24 23:15:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-24 23:15:01,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:15:01,775 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:15:01,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 23:15:01,776 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:15:01,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:15:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2039249524, now seen corresponding path program 1 times [2023-11-24 23:15:01,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:15:01,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159422775] [2023-11-24 23:15:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:01,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:15:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-24 23:15:03,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:15:03,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159422775] [2023-11-24 23:15:03,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159422775] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:15:03,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688516656] [2023-11-24 23:15:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:15:03,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:15:03,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:15:03,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:15:03,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6c70ff4-3b6f-4930-b53f-5c3acc0ba931/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:15:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:15:04,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 23:15:04,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:15:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-11-24 23:15:04,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:15:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-24 23:15:05,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688516656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:15:05,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208522252] [2023-11-24 23:15:05,260 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2023-11-24 23:15:05,260 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:15:05,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:15:05,271 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:15:05,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs