./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh --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 383b91606ce09b9a994eb030f2dbda7bfbddbf7edfef74a87019ad2186d8765d --- 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-2329fc7 [2022-12-14 16:10:13,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:10:13,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:10:13,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:10:13,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:10:13,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:10:13,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:10:13,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:10:13,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:10:13,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:10:13,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:10:13,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:10:13,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:10:13,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:10:13,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:10:13,423 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:10:13,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:10:13,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:10:13,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:10:13,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:10:13,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:10:13,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:10:13,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:10:13,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:10:13,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:10:13,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:10:13,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:10:13,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:10:13,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:10:13,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:10:13,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:10:13,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:10:13,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:10:13,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:10:13,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:10:13,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:10:13,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:10:13,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:10:13,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:10:13,439 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:10:13,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:10:13,441 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 16:10:13,464 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:10:13,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:10:13,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:10:13,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:10:13,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:10:13,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:10:13,467 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:10:13,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:10:13,467 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:10:13,467 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 16:10:13,468 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:10:13,468 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:10:13,468 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 16:10:13,468 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 16:10:13,469 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:10:13,469 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 16:10:13,469 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 16:10:13,469 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 16:10:13,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:10:13,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 16:10:13,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:10:13,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 16:10:13,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:10:13,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 16:10:13,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 16:10:13,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:10:13,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 16:10:13,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:10:13,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:10:13,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:10:13,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:10:13,472 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 16:10:13,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:10:13,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 16:10:13,472 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 16:10:13,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 16:10:13,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 16:10:13,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:10:13,473 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_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 383b91606ce09b9a994eb030f2dbda7bfbddbf7edfef74a87019ad2186d8765d [2022-12-14 16:10:13,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:10:13,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:10:13,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:10:13,687 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:10:13,687 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:10:13,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i [2022-12-14 16:10:16,268 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:10:16,562 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:10:16,562 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i [2022-12-14 16:10:16,583 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/data/3123bafb6/a355c451537c4ca4bce1f31189cda619/FLAG6ed15ce53 [2022-12-14 16:10:16,840 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/data/3123bafb6/a355c451537c4ca4bce1f31189cda619 [2022-12-14 16:10:16,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:10:16,843 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:10:16,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:10:16,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:10:16,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:10:16,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:10:16" (1/1) ... [2022-12-14 16:10:16,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e0646b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:16, skipping insertion in model container [2022-12-14 16:10:16,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:10:16" (1/1) ... [2022-12-14 16:10:16,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:10:16,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:10:17,077 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_851ec266-0b1a-4e4e-b191-68cf15ce33c4/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i[4494,4507] [2022-12-14 16:10:17,083 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_851ec266-0b1a-4e4e-b191-68cf15ce33c4/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i[4554,4567] [2022-12-14 16:10:17,694 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 16:10:17,699 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,699 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,700 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,700 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,701 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,712 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,712 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,714 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,714 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,716 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,717 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,718 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,718 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:17,771 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 16:10:17,771 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 16:10:17,772 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 16:10:17,775 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 16:10:17,777 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 16:10:17,777 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 16:10:17,987 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 16:10:17,988 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 16:10:17,988 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 16:10:17,989 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 16:10:17,990 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 16:10:17,991 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 16:10:17,992 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 16:10:17,992 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 16:10:17,993 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 16:10:17,993 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 16:10:17,994 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 16:10:18,106 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 16:10:18,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:10:18,135 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:10:18,144 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_851ec266-0b1a-4e4e-b191-68cf15ce33c4/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i[4494,4507] [2022-12-14 16:10:18,145 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_851ec266-0b1a-4e4e-b191-68cf15ce33c4/sv-benchmarks/c/aws-c-common/aws_linked_list_init_harness_negated.i[4554,4567] [2022-12-14 16:10:18,170 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 16:10:18,173 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,173 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,173 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,174 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,174 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,180 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,180 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,181 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,181 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,182 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,182 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,183 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,183 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 16:10:18,188 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 16:10:18,188 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 16:10:18,189 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 16:10:18,192 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 16:10:18,193 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 16:10:18,194 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 16:10:18,218 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 16:10:18,219 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 16:10:18,220 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 16:10:18,221 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 16:10:18,222 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 16:10:18,223 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 16:10:18,223 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 16:10:18,224 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 16:10:18,224 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 16:10:18,225 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 16:10:18,235 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 16:10:18,256 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 16:10:18,271 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:10:18,444 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:10:18,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18 WrapperNode [2022-12-14 16:10:18,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:10:18,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:10:18,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:10:18,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:10:18,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,528 INFO L138 Inliner]: procedures = 679, calls = 1035, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 92 [2022-12-14 16:10:18,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:10:18,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:10:18,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:10:18,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:10:18,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,560 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:10:18,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:10:18,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:10:18,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:10:18,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (1/1) ... [2022-12-14 16:10:18,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:10:18,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:10:18,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:10:18,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:10:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-12-14 16:10:18,628 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-12-14 16:10:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 16:10:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 16:10:18,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 16:10:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 16:10:18,628 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 16:10:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-12-14 16:10:18,628 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-12-14 16:10:18,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 16:10:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 16:10:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:10:18,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:10:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-12-14 16:10:18,629 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-12-14 16:10:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 16:10:18,629 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 16:10:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 16:10:18,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 16:10:18,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 16:10:18,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 16:10:18,814 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:10:18,816 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:10:18,981 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:10:19,059 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:10:19,059 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 16:10:19,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:10:19 BoogieIcfgContainer [2022-12-14 16:10:19,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:10:19,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:10:19,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:10:19,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:10:19,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:10:16" (1/3) ... [2022-12-14 16:10:19,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140fb20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:10:19, skipping insertion in model container [2022-12-14 16:10:19,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:10:18" (2/3) ... [2022-12-14 16:10:19,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@140fb20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:10:19, skipping insertion in model container [2022-12-14 16:10:19,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:10:19" (3/3) ... [2022-12-14 16:10:19,069 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_init_harness_negated.i [2022-12-14 16:10:19,086 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:10:19,086 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 16:10:19,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:10:19,123 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;@5dd42595, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:10:19,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 16:10:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 16:10:19,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 16:10:19,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:19,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:19,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash -2020375399, now seen corresponding path program 1 times [2022-12-14 16:10:19,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:19,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231047386] [2022-12-14 16:10:19,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:10:19,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231047386] [2022-12-14 16:10:19,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231047386] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:19,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:19,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 16:10:19,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038162174] [2022-12-14 16:10:19,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:19,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:10:19,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:10:19,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 16:10:19,761 INFO L87 Difference]: Start difference. First operand has 41 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 16:10:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:19,864 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2022-12-14 16:10:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 16:10:19,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2022-12-14 16:10:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:19,874 INFO L225 Difference]: With dead ends: 83 [2022-12-14 16:10:19,874 INFO L226 Difference]: Without dead ends: 47 [2022-12-14 16:10:19,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:10:19,881 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:19,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 184 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:10:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-14 16:10:19,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-12-14 16:10:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 16:10:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-12-14 16:10:19,920 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 16 [2022-12-14 16:10:19,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:19,920 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-12-14 16:10:19,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 16:10:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-12-14 16:10:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 16:10:19,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:19,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:19,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 16:10:19,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:19,923 INFO L85 PathProgramCache]: Analyzing trace with hash 538116661, now seen corresponding path program 1 times [2022-12-14 16:10:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:19,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308086950] [2022-12-14 16:10:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:19,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:10:20,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:20,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308086950] [2022-12-14 16:10:20,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308086950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:20,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:20,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 16:10:20,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687258309] [2022-12-14 16:10:20,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:20,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 16:10:20,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 16:10:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 16:10:20,047 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 16:10:20,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:20,181 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-12-14 16:10:20,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:10:20,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-12-14 16:10:20,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:20,183 INFO L225 Difference]: With dead ends: 84 [2022-12-14 16:10:20,183 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 16:10:20,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 16:10:20,185 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:20,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 160 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:10:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 16:10:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-14 16:10:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 16:10:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-12-14 16:10:20,195 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2022-12-14 16:10:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:20,195 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-12-14 16:10:20,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 16:10:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-12-14 16:10:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 16:10:20,196 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:20,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:20,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 16:10:20,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1170184183, now seen corresponding path program 1 times [2022-12-14 16:10:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:20,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682991656] [2022-12-14 16:10:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:10:20,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:20,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682991656] [2022-12-14 16:10:20,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682991656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:20,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:20,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 16:10:20,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910588932] [2022-12-14 16:10:20,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:20,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 16:10:20,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:20,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 16:10:20,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 16:10:20,328 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 16:10:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:20,496 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-12-14 16:10:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 16:10:20,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-12-14 16:10:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:20,498 INFO L225 Difference]: With dead ends: 93 [2022-12-14 16:10:20,498 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 16:10:20,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:10:20,499 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 61 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:20,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 170 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:10:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 16:10:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2022-12-14 16:10:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 16:10:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-12-14 16:10:20,508 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 20 [2022-12-14 16:10:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:20,508 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-12-14 16:10:20,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 16:10:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-12-14 16:10:20,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 16:10:20,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:20,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:20,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 16:10:20,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:20,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:20,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1925302219, now seen corresponding path program 1 times [2022-12-14 16:10:20,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:20,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003901223] [2022-12-14 16:10:20,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:20,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:10:20,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:20,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003901223] [2022-12-14 16:10:20,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003901223] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:20,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:20,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 16:10:20,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498573986] [2022-12-14 16:10:20,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:20,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 16:10:20,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:20,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 16:10:20,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 16:10:20,727 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 16:10:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:20,925 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2022-12-14 16:10:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 16:10:20,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-12-14 16:10:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:20,927 INFO L225 Difference]: With dead ends: 93 [2022-12-14 16:10:20,927 INFO L226 Difference]: Without dead ends: 53 [2022-12-14 16:10:20,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:10:20,929 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 54 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:20,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 170 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:10:20,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-14 16:10:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-12-14 16:10:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 16:10:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-12-14 16:10:20,937 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 21 [2022-12-14 16:10:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:20,937 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-12-14 16:10:20,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 16:10:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-12-14 16:10:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 16:10:20,938 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:20,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:20,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 16:10:20,938 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:20,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:20,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1961749134, now seen corresponding path program 1 times [2022-12-14 16:10:20,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:20,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230652458] [2022-12-14 16:10:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:20,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:10:21,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230652458] [2022-12-14 16:10:21,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230652458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:21,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:10:21,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 16:10:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878860540] [2022-12-14 16:10:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:21,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 16:10:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 16:10:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:10:21,116 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 16:10:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:21,194 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-12-14 16:10:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:10:21,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-12-14 16:10:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:21,196 INFO L225 Difference]: With dead ends: 59 [2022-12-14 16:10:21,196 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 16:10:21,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 16:10:21,197 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:21,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 215 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:10:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 16:10:21,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2022-12-14 16:10:21,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 16:10:21,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-12-14 16:10:21,205 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 24 [2022-12-14 16:10:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:21,205 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-12-14 16:10:21,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 16:10:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-12-14 16:10:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 16:10:21,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:21,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:21,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 16:10:21,206 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:21,206 INFO L85 PathProgramCache]: Analyzing trace with hash -314126348, now seen corresponding path program 1 times [2022-12-14 16:10:21,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:21,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345859969] [2022-12-14 16:10:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:21,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:10:21,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:10:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345859969] [2022-12-14 16:10:21,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345859969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:10:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280757504] [2022-12-14 16:10:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:21,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:10:21,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:10:21,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:10:21,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 16:10:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:10:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-14 16:10:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:10:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:10:24,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:10:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 16:10:24,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280757504] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:10:24,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1670389721] [2022-12-14 16:10:24,562 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 16:10:24,562 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:10:24,565 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:10:24,568 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:10:24,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:10:24,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,649 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 16:10:24,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-12-14 16:10:24,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,699 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 16:10:24,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-12-14 16:10:24,724 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_init with input of size 113 for LOIs [2022-12-14 16:10:24,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 93 [2022-12-14 16:10:24,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-12-14 16:10:24,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:24,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 95 [2022-12-14 16:10:25,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2022-12-14 16:10:25,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2022-12-14 16:10:25,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 95 [2022-12-14 16:10:25,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-12-14 16:10:25,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 93 [2022-12-14 16:10:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 42 [2022-12-14 16:10:25,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-12-14 16:10:25,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 87 [2022-12-14 16:10:25,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 87 [2022-12-14 16:10:25,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 93 [2022-12-14 16:10:25,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 20 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 95 [2022-12-14 16:10:25,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-12-14 16:10:25,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 16:10:25,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2022-12-14 16:10:25,766 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 140 for LOIs [2022-12-14 16:10:25,828 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 133 for LOIs [2022-12-14 16:10:26,613 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 107 for LOIs [2022-12-14 16:10:26,632 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-12-14 16:10:26,700 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:10:34,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1670389721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:10:34,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 16:10:34,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [10, 10, 6] total 42 [2022-12-14 16:10:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603717672] [2022-12-14 16:10:34,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:10:34,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 16:10:34,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:10:34,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 16:10:34,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 16:10:34,035 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 16:10:38,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:10:38,226 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2022-12-14 16:10:38,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 16:10:38,227 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.125) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-12-14 16:10:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:10:38,228 INFO L225 Difference]: With dead ends: 119 [2022-12-14 16:10:38,228 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 16:10:38,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=268, Invalid=1988, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 16:10:38,230 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:10:38,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 134 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 16:10:38,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 16:10:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2022-12-14 16:10:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-12-14 16:10:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2022-12-14 16:10:38,253 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 26 [2022-12-14 16:10:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:10:38,254 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2022-12-14 16:10:38,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.125) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 16:10:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2022-12-14 16:10:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 16:10:38,254 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:10:38,255 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 16:10:38,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:10:38,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 16:10:38,457 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:10:38,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:10:38,458 INFO L85 PathProgramCache]: Analyzing trace with hash -694288424, now seen corresponding path program 1 times [2022-12-14 16:10:38,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:10:38,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157892561] [2022-12-14 16:10:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:10:38,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:10:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 16:10:38,492 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 16:10:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 16:10:38,522 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 16:10:38,522 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 16:10:38,523 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 16:10:38,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 16:10:38,527 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:10:38,529 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 16:10:38,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 04:10:38 BoogieIcfgContainer [2022-12-14 16:10:38,551 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 16:10:38,552 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 16:10:38,552 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 16:10:38,552 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 16:10:38,552 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:10:19" (3/4) ... [2022-12-14 16:10:38,553 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 16:10:38,591 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 16:10:38,591 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 16:10:38,592 INFO L158 Benchmark]: Toolchain (without parser) took 21748.45ms. Allocated memory was 165.7MB in the beginning and 287.3MB in the end (delta: 121.6MB). Free memory was 124.6MB in the beginning and 122.9MB in the end (delta: 1.7MB). Peak memory consumption was 124.3MB. Max. memory is 16.1GB. [2022-12-14 16:10:38,592 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 115.3MB. Free memory was 80.1MB in the beginning and 80.1MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 16:10:38,592 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1600.62ms. Allocated memory is still 165.7MB. Free memory was 124.6MB in the beginning and 119.5MB in the end (delta: 5.1MB). Peak memory consumption was 96.2MB. Max. memory is 16.1GB. [2022-12-14 16:10:38,592 INFO L158 Benchmark]: Boogie Procedure Inliner took 82.90ms. Allocated memory is still 165.7MB. Free memory was 119.5MB in the beginning and 114.2MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 16:10:38,592 INFO L158 Benchmark]: Boogie Preprocessor took 35.40ms. Allocated memory is still 165.7MB. Free memory was 114.2MB in the beginning and 112.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 16:10:38,593 INFO L158 Benchmark]: RCFGBuilder took 496.67ms. Allocated memory is still 165.7MB. Free memory was 112.1MB in the beginning and 80.7MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2022-12-14 16:10:38,593 INFO L158 Benchmark]: TraceAbstraction took 19487.78ms. Allocated memory was 165.7MB in the beginning and 287.3MB in the end (delta: 121.6MB). Free memory was 79.7MB in the beginning and 126.0MB in the end (delta: -46.3MB). Peak memory consumption was 76.3MB. Max. memory is 16.1GB. [2022-12-14 16:10:38,593 INFO L158 Benchmark]: Witness Printer took 39.51ms. Allocated memory is still 287.3MB. Free memory was 126.0MB in the beginning and 122.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 16:10:38,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 115.3MB. Free memory was 80.1MB in the beginning and 80.1MB in the end (delta: 24.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1600.62ms. Allocated memory is still 165.7MB. Free memory was 124.6MB in the beginning and 119.5MB in the end (delta: 5.1MB). Peak memory consumption was 96.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 82.90ms. Allocated memory is still 165.7MB. Free memory was 119.5MB in the beginning and 114.2MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.40ms. Allocated memory is still 165.7MB. Free memory was 114.2MB in the beginning and 112.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 496.67ms. Allocated memory is still 165.7MB. Free memory was 112.1MB in the beginning and 80.7MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * TraceAbstraction took 19487.78ms. Allocated memory was 165.7MB in the beginning and 287.3MB in the end (delta: 121.6MB). Free memory was 79.7MB in the beginning and 126.0MB in the end (delta: -46.3MB). Peak memory consumption was 76.3MB. Max. memory is 16.1GB. * Witness Printer took 39.51ms. Allocated memory is still 287.3MB. Free memory was 126.0MB in the beginning and 122.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 223]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6913-L6918] static struct aws_allocator s_can_fail_allocator_static = { .mem_acquire = s_can_fail_malloc_allocator, .mem_release = s_can_fail_free_allocator, .mem_realloc = s_can_fail_realloc_allocator, .mem_calloc = s_can_fail_calloc_allocator, }; [L7358] static __thread int tl_last_error = 0; [L7387] CALL aws_linked_list_init_harness() [L7376] struct aws_linked_list list; VAL [list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L7382] CALL aws_linked_list_init(&list) VAL [list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4771] CALL assume_abort_if_not((list)) VAL [\old(cond)=1, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L211] COND FALSE !(!cond) [L4771] RET assume_abort_if_not((list)) VAL [list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4772] list->head.next = &list->tail [L4773-L4774] list->head.prev = ((void *)0) [L4776] list->tail.prev = &list->head [L4777-L4778] list->tail.next = ((void *)0) VAL [list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4780] CALL, EXPR aws_linked_list_is_valid(list) VAL [list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694] EXPR list && list->head.next [L4694] EXPR list->head.next [L4694] EXPR list && list->head.next [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694] EXPR list->head.prev [L4694-L4695] EXPR list && list->head.next && list->head.prev == ((void *)0) [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4696] EXPR list->tail.prev [L4694-L4696] EXPR list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4696] EXPR list->tail.next [L4694-L4697] list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) VAL [list={6:0}, list={6:0}, list && list->head.next=1, list && list->head.next && list->head.prev == ((void *)0)=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev=1, list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0)=1, list->head.next={6:16}, list->head.prev={0:0}, list->tail.next={0:0}, list->tail.prev={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4694-L4697] COND TRUE list && list->head.next && list->head.prev == ((void *)0) && list->tail.prev && list->tail.next == ((void *)0) [L4700] CALL, EXPR aws_linked_list_is_valid_deep(list) [L4734] COND FALSE !(!list) [L4740] const struct aws_linked_list_node *temp = &list->head; [L4743-L4746] _Bool head_reaches_tail = 0 ; VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4751] COND FALSE !(temp == &list->tail) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] CALL, EXPR aws_linked_list_node_next_is_valid(temp) VAL [node={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4718] EXPR node && node->next [L4718] EXPR node->next [L4718] EXPR node && node->next [L4718] EXPR node && node->next && node->next->prev == node [L4718] EXPR node->next [L4718] EXPR node->next->prev [L4718] EXPR node && node->next && node->next->prev == node [L4718] return node && node->next && node->next->prev == node; [L4756] RET, EXPR aws_linked_list_node_next_is_valid(temp) VAL [aws_linked_list_node_next_is_valid(temp)=1, head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:0}, tl_last_error=0] [L4756] COND FALSE !(!aws_linked_list_node_next_is_valid(temp)) [L4762] EXPR temp->next [L4762] temp = temp->next [L4750] COND TRUE \read(*temp) VAL [head_reaches_tail=0, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4751] COND TRUE temp == &list->tail [L4752-L4753] head_reaches_tail = 1 VAL [head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4764] return head_reaches_tail; VAL [\result=1, head_reaches_tail=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, temp={6:16}, tl_last_error=0] [L4700] RET, EXPR aws_linked_list_is_valid_deep(list) [L4700] return aws_linked_list_is_valid_deep(list); [L4780] RET, EXPR aws_linked_list_is_valid(list) VAL [aws_linked_list_is_valid(list)=1, list={6:0}, list={6:0}, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L4780] CALL __VERIFIER_assert(!((aws_linked_list_is_valid(list)))) VAL [\old(cond)=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] COND TRUE !cond VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] [L223] reach_error() VAL [\old(cond)=0, cond=0, s_can_fail_allocator_static={4:0}, tl_last_error=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.4s, OverallIterations: 7, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 241 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 225 mSDsluCounter, 1033 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 839 mSDsCounter, 56 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1128 IncrementalHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 56 mSolverCounterUnsat, 194 mSDtfsCounter, 1128 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 10.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=6, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 33 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 178 NumberOfCodeBlocks, 178 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 169 ConstructedInterpolants, 3 QuantifiedInterpolants, 2783 SizeOfPredicates, 21 NumberOfNonLiveVariables, 222 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 32, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 40, TOOLS_POST_TIME: 0.8s, TOOLS_POST_CALL_APPLICATIONS: 19, TOOLS_POST_CALL_TIME: 0.7s, TOOLS_POST_RETURN_APPLICATIONS: 14, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 73, TOOLS_QUANTIFIERELIM_TIME: 1.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 103, FLUID_YES_ANSWERS: 2, DOMAIN_JOIN_APPLICATIONS: 14, DOMAIN_JOIN_TIME: 0.2s, DOMAIN_ALPHA_APPLICATIONS: 2, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 32, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 0.4s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.4s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 14, CALL_SUMMARIZER_CACHE_MISSES: 3, CALL_SUMMARIZER_OVERALL_TIME: 0.2s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 279, DAG_COMPRESSION_RETAINED_NODES: 90, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 16:10:38,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_851ec266-0b1a-4e4e-b191-68cf15ce33c4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE