./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --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 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:32:23,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:32:23,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:32:23,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:32:23,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:32:23,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:32:23,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:32:23,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:32:23,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:32:23,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:32:23,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:32:23,463 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:32:23,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:32:23,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:32:23,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:32:23,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:32:23,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:32:23,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:32:23,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:32:23,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:32:23,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:32:23,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:32:23,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:32:23,486 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:32:23,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:32:23,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:32:23,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:32:23,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:32:23,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:32:23,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:32:23,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:32:23,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:32:23,504 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:32:23,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:32:23,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:32:23,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:32:23,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:32:23,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:32:23,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:32:23,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:32:23,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:32:23,513 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-25 22:32:23,548 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:32:23,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:32:23,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:32:23,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:32:23,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:32:23,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:32:23,553 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:32:23,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:32:23,554 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:32:23,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:32:23,555 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:32:23,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:32:23,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:32:23,556 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:32:23,556 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:32:23,556 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:32:23,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:32:23,557 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:32:23,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:32:23,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:32:23,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:32:23,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:32:23,558 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:32:23,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:32:23,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:32:23,559 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:32:23,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:32:23,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:32:23,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:32:23,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:32:23,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:32:23,561 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:32:23,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:32:23,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:32:23,562 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:32:23,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:32:23,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:32:23,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:32:23,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 884fded8e66f5d1fb48ea41b5fc2a80efc48c733a21e019f076525ed24611a3d [2022-11-25 22:32:23,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:32:23,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:32:23,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:32:23,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:32:23,909 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:32:23,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2022-11-25 22:32:26,981 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:32:27,520 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:32:27,521 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i [2022-11-25 22:32:27,558 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/data/474e77250/fc05acd93f1a4e4a948a7567dcd6ec55/FLAG6ff4a25a4 [2022-11-25 22:32:27,573 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/data/474e77250/fc05acd93f1a4e4a948a7567dcd6ec55 [2022-11-25 22:32:27,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:32:27,583 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:32:27,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:32:27,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:32:27,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:32:27,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:32:27" (1/1) ... [2022-11-25 22:32:27,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14129122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:27, skipping insertion in model container [2022-11-25 22:32:27,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:32:27" (1/1) ... [2022-11-25 22:32:27,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:32:27,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:32:27,981 WARN L237 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_51cdaeb9-5972-4c56-9f2c-3730e01f832b/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2022-11-25 22:32:27,991 WARN L237 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_51cdaeb9-5972-4c56-9f2c-3730e01f832b/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2022-11-25 22:32:29,197 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,198 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,199 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,200 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,201 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,213 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,220 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,222 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,222 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,302 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:32:29,304 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:32:29,305 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:32:29,312 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 22:32:29,322 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 22:32:29,324 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 22:32:29,653 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 22:32:29,657 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 22:32:29,658 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 22:32:29,659 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 22:32:29,660 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 22:32:29,662 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 22:32:29,663 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 22:32:29,663 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 22:32:29,664 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 22:32:29,665 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 22:32:29,665 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 22:32:29,825 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 22:32:29,862 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 22:32:29,872 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:32:29,930 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:32:29,937 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:29,938 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,037 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 22:32:30,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:32:30,097 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:32:30,128 WARN L237 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_51cdaeb9-5972-4c56-9f2c-3730e01f832b/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4492,4505] [2022-11-25 22:32:30,139 WARN L237 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_51cdaeb9-5972-4c56-9f2c-3730e01f832b/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_harness.i[4552,4565] [2022-11-25 22:32:30,181 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,181 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,182 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,182 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,183 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,195 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,199 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,200 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,201 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,209 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:32:30,209 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:32:30,210 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:32:30,213 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 22:32:30,214 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 22:32:30,214 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 22:32:30,232 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 22:32:30,233 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 22:32:30,234 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 22:32:30,235 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 22:32:30,235 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 22:32:30,236 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 22:32:30,237 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 22:32:30,237 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 22:32:30,238 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 22:32:30,238 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 22:32:30,239 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 22:32:30,257 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 22:32:30,278 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 22:32:30,284 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:32:30,308 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:32:30,314 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,315 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:32:30,345 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 22:32:30,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:32:30,642 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:32:30,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30 WrapperNode [2022-11-25 22:32:30,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:32:30,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:32:30,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:32:30,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:32:30,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,872 INFO L138 Inliner]: procedures = 690, calls = 2636, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 870 [2022-11-25 22:32:30,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:32:30,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:32:30,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:32:30,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:32:30,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,951 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:32:30,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:32:30,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:32:30,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:32:30,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (1/1) ... [2022-11-25 22:32:30,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:32:31,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:32:31,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:32:31,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:32:31,080 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-25 22:32:31,080 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-25 22:32:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:32:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-25 22:32:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-25 22:32:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2022-11-25 22:32:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-25 22:32:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-25 22:32:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:32:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-25 22:32:31,083 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-25 22:32:31,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 22:32:31,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 22:32:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 22:32:31,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:32:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 22:32:31,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:32:31,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:32:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 22:32:31,086 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 22:32:31,086 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-25 22:32:31,087 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-25 22:32:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-25 22:32:31,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-25 22:32:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:32:31,088 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:32:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:32:31,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 22:32:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2022-11-25 22:32:31,089 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2022-11-25 22:32:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 22:32:31,089 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-25 22:32:31,090 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-25 22:32:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-25 22:32:31,090 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-25 22:32:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:32:31,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2022-11-25 22:32:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:32:31,433 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:32:31,435 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:32:33,134 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:32:33,400 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:32:33,401 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 22:32:33,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:32:33 BoogieIcfgContainer [2022-11-25 22:32:33,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:32:33,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:32:33,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:32:33,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:32:33,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:32:27" (1/3) ... [2022-11-25 22:32:33,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69289d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:32:33, skipping insertion in model container [2022-11-25 22:32:33,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:32:30" (2/3) ... [2022-11-25 22:32:33,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69289d75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:32:33, skipping insertion in model container [2022-11-25 22:32:33,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:32:33" (3/3) ... [2022-11-25 22:32:33,424 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_harness.i [2022-11-25 22:32:33,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:32:33,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:32:33,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:32:33,518 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=LoopsAndPotentialCycles, 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;@7e7b759a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:32:33,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:32:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 56 states have internal predecessors, (68), 32 states have call successors, (32), 10 states have call predecessors, (32), 10 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-25 22:32:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-25 22:32:33,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:32:33,533 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2022-11-25 22:32:33,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:32:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:32:33,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1678221370, now seen corresponding path program 1 times [2022-11-25 22:32:33,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:32:33,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909533347] [2022-11-25 22:32:33,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:32:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-25 22:32:47,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:32:47,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909533347] [2022-11-25 22:32:47,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909533347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:32:47,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299475681] [2022-11-25 22:32:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:32:47,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:32:47,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:32:47,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:32:47,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51cdaeb9-5972-4c56-9f2c-3730e01f832b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:32:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:32:48,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 2540 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-25 22:32:48,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:32:49,143 INFO L350 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 13 treesize of output 9 [2022-11-25 22:32:58,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:32:58,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 81 treesize of output 65 [2022-11-25 22:32:58,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:32:58,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-25 22:32:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:32:58,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:33:01,180 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-25 22:40:34,217 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.