./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS --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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- 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-8393723 [2022-11-19 06:34:09,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:34:09,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:34:09,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:34:09,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:34:09,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:34:09,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:34:09,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:34:09,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:34:09,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:34:09,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:34:09,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:34:09,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:34:09,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:34:09,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:34:09,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:34:09,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:34:09,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:34:09,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:34:09,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:34:09,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:34:09,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:34:09,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:34:09,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:34:09,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:34:09,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:34:09,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:34:09,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:34:09,531 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:34:09,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:34:09,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:34:09,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:34:09,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:34:09,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:34:09,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:34:09,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:34:09,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:34:09,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:34:09,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:34:09,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:34:09,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:34:09,543 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 06:34:09,594 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:34:09,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:34:09,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:34:09,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:34:09,600 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:34:09,600 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:34:09,600 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:34:09,601 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:34:09,601 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:34:09,601 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:34:09,603 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:34:09,603 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:34:09,603 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:34:09,604 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:34:09,604 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:34:09,604 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:34:09,605 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:34:09,605 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:34:09,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:34:09,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:34:09,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:34:09,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:34:09,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:34:09,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:34:09,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:34:09,610 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:34:09,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:34:09,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:34:09,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:34:09,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:34:09,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:34:09,612 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:34:09,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:34:09,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:34:09,613 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:34:09,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:34:09,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:34:09,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:34:09,614 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_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-11-19 06:34:10,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:34:10,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:34:10,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:34:10,049 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:34:10,050 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:34:10,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-19 06:34:10,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/data/0fdb4f1c6/eed853dbdf8c4a44af58b5cdf0dfec52/FLAGd6492c6ba [2022-11-19 06:34:11,063 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:34:11,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-19 06:34:11,115 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/data/0fdb4f1c6/eed853dbdf8c4a44af58b5cdf0dfec52/FLAGd6492c6ba [2022-11-19 06:34:11,620 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/data/0fdb4f1c6/eed853dbdf8c4a44af58b5cdf0dfec52 [2022-11-19 06:34:11,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:34:11,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:34:11,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:34:11,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:34:11,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:34:11,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:34:11" (1/1) ... [2022-11-19 06:34:11,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181b0e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:11, skipping insertion in model container [2022-11-19 06:34:11,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:34:11" (1/1) ... [2022-11-19 06:34:11,651 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:34:11,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:34:12,087 WARN L234 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_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-19 06:34:12,096 WARN L234 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_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-19 06:34:13,019 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,024 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,026 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,029 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,032 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,051 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,052 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,054 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,055 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,058 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,059 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,060 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,061 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,516 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 06:34:13,523 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 06:34:13,527 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 06:34:13,529 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 06:34:13,534 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 06:34:13,537 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 06:34:13,538 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 06:34:13,540 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 06:34:13,542 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 06:34:13,546 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 06:34:13,742 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 06:34:13,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:13,789 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:34:13,804 WARN L234 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_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-19 06:34:13,805 WARN L234 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_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-19 06:34:13,883 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,899 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,900 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,901 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,902 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,910 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,911 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,912 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,921 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,922 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,923 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,924 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:13,924 WARN L1568 CHandler]: Possible shadowing of function index [2022-11-19 06:34:14,031 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-19 06:34:14,036 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-19 06:34:14,037 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-19 06:34:14,072 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-19 06:34:14,073 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-19 06:34:14,074 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-19 06:34:14,075 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-19 06:34:14,075 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-19 06:34:14,076 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-19 06:34:14,076 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-19 06:34:14,132 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-19 06:34:14,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:34:14,398 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:34:14,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14 WrapperNode [2022-11-19 06:34:14,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:34:14,400 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:14,400 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:34:14,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:34:14,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,616 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 141 [2022-11-19 06:34:14,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:34:14,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:34:14,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:34:14,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:34:14,632 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,641 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:34:14,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:34:14,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:34:14,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:34:14,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (1/1) ... [2022-11-19 06:34:14,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:34:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:14,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:34:14,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:34:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:34:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:34:14,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:34:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-19 06:34:14,802 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-19 06:34:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:34:14,802 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-19 06:34:14,802 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-19 06:34:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:34:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:34:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:34:14,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:34:14,803 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 06:34:14,803 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 06:34:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:34:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:34:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 06:34:14,804 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-19 06:34:14,805 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-19 06:34:14,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:34:15,163 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:34:15,166 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:34:15,579 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:34:15,741 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:34:15,741 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 06:34:15,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:15 BoogieIcfgContainer [2022-11-19 06:34:15,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:34:15,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:34:15,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:34:15,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:34:15,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:34:11" (1/3) ... [2022-11-19 06:34:15,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a8f7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:15, skipping insertion in model container [2022-11-19 06:34:15,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:34:14" (2/3) ... [2022-11-19 06:34:15,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a8f7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:34:15, skipping insertion in model container [2022-11-19 06:34:15,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:34:15" (3/3) ... [2022-11-19 06:34:15,756 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2022-11-19 06:34:15,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:34:15,780 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:34:15,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:34:15,851 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;@1ec86be1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:34:15,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:34:15,857 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 06:34:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 06:34:15,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:15,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:15,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash -176466560, now seen corresponding path program 1 times [2022-11-19 06:34:15,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:15,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068935197] [2022-11-19 06:34:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:15,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:34:16,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:16,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068935197] [2022-11-19 06:34:16,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068935197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:16,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823493949] [2022-11-19 06:34:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:16,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:16,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:16,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:16,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:34:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:17,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-19 06:34:17,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:17,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:34:17,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:34:17,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:17,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:17,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-19 06:34:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:17,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:17,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:17,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-19 06:34:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:34:20,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:34:20,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823493949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:20,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:34:20,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-19 06:34:20,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519272224] [2022-11-19 06:34:20,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:20,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:34:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:20,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:34:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:34:20,844 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:34:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:21,467 INFO L93 Difference]: Finished difference Result 119 states and 174 transitions. [2022-11-19 06:34:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:34:21,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-19 06:34:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:21,483 INFO L225 Difference]: With dead ends: 119 [2022-11-19 06:34:21,483 INFO L226 Difference]: Without dead ends: 80 [2022-11-19 06:34:21,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:34:21,503 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 21 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:21,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 219 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 89 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-19 06:34:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-19 06:34:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2022-11-19 06:34:21,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-19 06:34:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-11-19 06:34:21,586 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 37 [2022-11-19 06:34:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:21,587 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-11-19 06:34:21,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:34:21,588 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-11-19 06:34:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 06:34:21,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:21,592 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:21,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:21,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 06:34:21,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1924856341, now seen corresponding path program 1 times [2022-11-19 06:34:21,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:21,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217082723] [2022-11-19 06:34:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:21,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:34:22,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:22,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217082723] [2022-11-19 06:34:22,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217082723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:22,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075319589] [2022-11-19 06:34:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:22,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:22,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:22,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:34:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:22,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-19 06:34:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:22,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:34:22,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:34:22,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:22,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:22,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-19 06:34:22,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:22,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 06:34:22,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:22,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:22,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-19 06:34:22,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:22,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-19 06:34:23,080 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 06:34:23,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-11-19 06:34:23,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:23,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:23,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:23,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-11-19 06:34:23,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:23,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:23,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2022-11-19 06:34:23,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:23,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:23,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-11-19 06:34:23,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 06:34:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:23,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-11-19 06:34:23,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:34:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:34:26,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:32,449 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16)) (.cse2 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))))))) is different from false [2022-11-19 06:34:32,611 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse6 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse7 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse2 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse2 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (let ((.cse5 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse5) 0))) (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse5) 0))) (= v_ArrVal_212 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse6) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse7) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse8 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse8 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse6) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse9 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse9 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse7) 0)) (= v_ArrVal_212 0))))) is different from false [2022-11-19 06:34:32,711 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:34:32,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-19 06:34:32,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:34:32,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 137 [2022-11-19 06:34:32,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 128 [2022-11-19 06:34:32,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 126 [2022-11-19 06:34:32,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:34:32,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-19 06:34:32,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:34:32,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 516 treesize of output 444 [2022-11-19 06:34:32,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 322 treesize of output 314 [2022-11-19 06:34:32,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 310 [2022-11-19 06:34:33,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 06:34:33,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 06:34:33,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:34:33,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 72 [2022-11-19 06:34:33,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:34:33,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 79 [2022-11-19 06:34:33,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:34:33,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-19 06:34:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:33,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2022-11-19 06:34:33,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,277 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 06:34:33,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 24 [2022-11-19 06:34:33,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:34:33,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,314 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 06:34:33,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-19 06:34:33,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,335 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 06:34:33,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-19 06:34:33,344 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-19 06:34:33,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:33,361 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 06:34:33,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-19 06:34:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-19 06:34:33,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075319589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:33,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1750493572] [2022-11-19 06:34:33,503 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:34:33,504 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:33,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:33,514 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:33,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:33,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:33,622 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:34:33,623 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 46 [2022-11-19 06:34:33,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:33,703 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:34:33,703 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 [2022-11-19 06:34:34,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:34:34,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:34:34,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:34:34,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:34:34,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,258 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 06:34:34,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-19 06:34:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:34:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:34:34,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:34,385 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 06:34:34,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 06:34:34,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,491 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:34:34,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:34:34,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:34,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:34:34,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:34:34,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:34:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:34:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-19 06:34:34,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:34:34,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:34:34,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:34:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:34:34,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:34:34,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:34:34,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:34,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:34:35,685 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-19 06:34:35,966 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-19 06:34:36,036 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:34:36,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:34:39,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1750493572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:39,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:34:39,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2022-11-19 06:34:39,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989789877] [2022-11-19 06:34:39,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:39,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:34:39,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:34:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=777, Unknown=2, NotChecked=114, Total=992 [2022-11-19 06:34:39,464 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:34:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:40,089 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-11-19 06:34:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:34:40,089 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-19 06:34:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:40,092 INFO L225 Difference]: With dead ends: 100 [2022-11-19 06:34:40,092 INFO L226 Difference]: Without dead ends: 52 [2022-11-19 06:34:40,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=108, Invalid=828, Unknown=2, NotChecked=118, Total=1056 [2022-11-19 06:34:40,094 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:40,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 344 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-11-19 06:34:40,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-19 06:34:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-11-19 06:34:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 06:34:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2022-11-19 06:34:40,109 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 38 [2022-11-19 06:34:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:40,110 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2022-11-19 06:34:40,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:34:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2022-11-19 06:34:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 06:34:40,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:40,111 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:40,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:40,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:40,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1266222812, now seen corresponding path program 1 times [2022-11-19 06:34:40,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:40,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576592813] [2022-11-19 06:34:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:40,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:34:40,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576592813] [2022-11-19 06:34:40,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576592813] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:40,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281207715] [2022-11-19 06:34:40,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:40,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:40,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:40,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:34:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:40,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:34:40,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:34:40,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:34:40,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281207715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:40,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:34:40,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-19 06:34:40,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615210400] [2022-11-19 06:34:40,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:40,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:34:40,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:40,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:34:40,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:34:40,817 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:34:41,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:41,002 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2022-11-19 06:34:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:34:41,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2022-11-19 06:34:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:41,004 INFO L225 Difference]: With dead ends: 88 [2022-11-19 06:34:41,004 INFO L226 Difference]: Without dead ends: 53 [2022-11-19 06:34:41,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:34:41,005 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:41,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 149 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:34:41,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-19 06:34:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-19 06:34:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-19 06:34:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-11-19 06:34:41,026 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 39 [2022-11-19 06:34:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:41,027 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-11-19 06:34:41,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:34:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-11-19 06:34:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 06:34:41,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:41,037 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:41,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:41,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:41,245 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:41,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:41,245 INFO L85 PathProgramCache]: Analyzing trace with hash -693180958, now seen corresponding path program 1 times [2022-11-19 06:34:41,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:41,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665974747] [2022-11-19 06:34:41,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:41,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:41,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:34:41,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:41,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665974747] [2022-11-19 06:34:41,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665974747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:41,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635113802] [2022-11-19 06:34:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:41,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:41,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:41,451 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:41,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:34:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:34:41,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:34:41,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:34:41,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635113802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:41,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:34:41,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-19 06:34:41,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182750246] [2022-11-19 06:34:41,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:34:41,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:34:41,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:34:41,734 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:34:41,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:41,978 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2022-11-19 06:34:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:34:41,979 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-19 06:34:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:41,980 INFO L225 Difference]: With dead ends: 105 [2022-11-19 06:34:41,980 INFO L226 Difference]: Without dead ends: 65 [2022-11-19 06:34:41,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:34:41,981 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 66 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:41,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 175 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:34:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-19 06:34:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-11-19 06:34:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-19 06:34:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-19 06:34:41,999 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2022-11-19 06:34:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:42,000 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-19 06:34:42,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:34:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-19 06:34:42,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 06:34:42,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:42,001 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:42,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:42,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:42,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash 938537906, now seen corresponding path program 1 times [2022-11-19 06:34:42,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:42,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921558911] [2022-11-19 06:34:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:42,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:34:42,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921558911] [2022-11-19 06:34:42,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921558911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:42,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671636721] [2022-11-19 06:34:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:42,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:42,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:42,497 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:42,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:34:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:42,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:34:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:34:42,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:34:42,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671636721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:34:42,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:34:42,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-19 06:34:42,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469494827] [2022-11-19 06:34:42,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:34:42,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:34:42,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:34:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:34:42,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:34:42,744 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:34:42,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:34:42,810 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2022-11-19 06:34:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:34:42,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-19 06:34:42,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:34:42,814 INFO L225 Difference]: With dead ends: 106 [2022-11-19 06:34:42,814 INFO L226 Difference]: Without dead ends: 64 [2022-11-19 06:34:42,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:34:42,825 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:34:42,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:34:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-19 06:34:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-11-19 06:34:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-19 06:34:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2022-11-19 06:34:42,852 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 42 [2022-11-19 06:34:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:34:42,852 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2022-11-19 06:34:42,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:34:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2022-11-19 06:34:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 06:34:42,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:34:42,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:34:42,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:34:43,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:43,061 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:34:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:34:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1523962277, now seen corresponding path program 1 times [2022-11-19 06:34:43,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:34:43,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366764039] [2022-11-19 06:34:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:43,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:34:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:34:43,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:34:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366764039] [2022-11-19 06:34:43,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366764039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:34:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432674617] [2022-11-19 06:34:43,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:34:43,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:34:43,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:34:43,276 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:34:43,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:34:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:34:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-19 06:34:43,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:34:43,556 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:34:43,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 06:34:43,574 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:34:43,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-19 06:34:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:34:49,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:34:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:34:53,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432674617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:34:53,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701130437] [2022-11-19 06:34:53,996 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 06:34:53,996 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:34:53,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:34:53,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:34:53,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:34:54,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,070 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:34:54,070 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 [2022-11-19 06:34:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 06:34:54,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:34:54,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:34:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:34:54,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:34:54,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:34:54,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:34:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:34:54,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:34:54,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:34:55,389 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 127 for LOIs [2022-11-19 06:34:56,015 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 169 for LOIs [2022-11-19 06:34:56,129 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:34:56,150 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-19 06:34:56,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:35:04,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [701130437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:35:04,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:35:04,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 12, 8] total 39 [2022-11-19 06:35:04,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649359057] [2022-11-19 06:35:04,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:35:04,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:35:04,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:35:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:35:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 06:35:04,290 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:35:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:35:07,340 INFO L93 Difference]: Finished difference Result 140 states and 193 transitions. [2022-11-19 06:35:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 06:35:07,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-19 06:35:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:35:07,343 INFO L225 Difference]: With dead ends: 140 [2022-11-19 06:35:07,343 INFO L226 Difference]: Without dead ends: 95 [2022-11-19 06:35:07,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 06:35:07,345 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 53 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:35:07,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 398 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 409 Invalid, 0 Unknown, 89 Unchecked, 1.2s Time] [2022-11-19 06:35:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-19 06:35:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-11-19 06:35:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 59 states have internal predecessors, (68), 24 states have call successors, (24), 9 states have call predecessors, (24), 11 states have return successors, (33), 22 states have call predecessors, (33), 23 states have call successors, (33) [2022-11-19 06:35:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2022-11-19 06:35:07,383 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 45 [2022-11-19 06:35:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:35:07,384 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2022-11-19 06:35:07,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:35:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2022-11-19 06:35:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:35:07,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:35:07,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:35:07,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 06:35:07,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:35:07,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:35:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:35:07,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1772458512, now seen corresponding path program 1 times [2022-11-19 06:35:07,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:35:07,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914492000] [2022-11-19 06:35:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:35:07,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:35:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:35:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:35:07,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:35:07,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914492000] [2022-11-19 06:35:07,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914492000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:35:07,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819248375] [2022-11-19 06:35:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:35:07,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:35:07,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:35:07,910 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:35:07,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:35:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:35:08,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-19 06:35:08,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:35:08,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 06:35:08,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:08,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:35:08,380 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 06:35:08,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-11-19 06:35:08,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:08,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-11-19 06:35:08,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:08,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-19 06:35:08,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-19 06:35:08,508 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| Int) (v_DerPreprocessor_13 (Array Int Int)) (v_DerPreprocessor_14 (Array Int Int))) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51|))) (let ((.cse1 (select .cse0 0))) (and (= (select .cse0 24) .cse1) (= .cse1 (select v_DerPreprocessor_14 24)) (not (= .cse1 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51|) (<= (+ .cse1 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_13) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_14) .cse1 v_DerPreprocessor_13) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_14) .cse1) (select |c_#memory_$Pointer$.base| .cse1)))))) is different from true [2022-11-19 06:35:22,093 WARN L233 SmtUtils]: Spent 9.80s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:35:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 6 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-19 06:35:31,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:35:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:35:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819248375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:35:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503637012] [2022-11-19 06:35:36,646 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 06:35:36,646 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:35:36,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:35:36,647 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:35:36,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:35:36,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:36,711 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:35:36,712 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 46 [2022-11-19 06:35:36,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:36,777 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:35:36,777 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 [2022-11-19 06:35:37,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:35:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:35:37,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:35:37,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:35:37,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,243 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:35:37,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:35:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:35:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:37,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:35:37,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:35:37,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:35:37,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-19 06:35:37,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:37,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:37,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:37,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:37,986 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-19 06:35:37,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-11-19 06:35:38,336 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-19 06:35:38,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 641 treesize of output 652 [2022-11-19 06:35:38,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:38,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:38,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:38,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:38,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:38,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:38,676 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-19 06:35:38,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 686 treesize of output 689 [2022-11-19 06:35:38,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:38,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:35:38,929 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-19 06:35:38,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 646 treesize of output 664 [2022-11-19 06:35:38,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:35:38,997 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-19 06:35:38,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 678 treesize of output 631 [2022-11-19 06:35:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:35:39,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 631 [2022-11-19 06:36:02,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:36:02,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:02,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:36:02,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:02,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 06:36:02,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:02,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:02,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 06:36:02,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:02,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:36:02,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:36:02,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:02,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:02,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:36:02,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:02,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:36:02,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:02,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:36:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:02,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:36:03,246 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 50 for LOIs [2022-11-19 06:36:03,684 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 154 for LOIs [2022-11-19 06:36:03,742 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:36:03,762 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-19 06:36:03,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:36:10,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [503637012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:36:10,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:36:10,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 52 [2022-11-19 06:36:10,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068775706] [2022-11-19 06:36:10,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:36:10,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:36:10,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:36:10,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:36:10,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2271, Unknown=108, NotChecked=98, Total=2652 [2022-11-19 06:36:10,878 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:36:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:36:12,375 INFO L93 Difference]: Finished difference Result 158 states and 208 transitions. [2022-11-19 06:36:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 06:36:12,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-11-19 06:36:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:36:12,377 INFO L225 Difference]: With dead ends: 158 [2022-11-19 06:36:12,377 INFO L226 Difference]: Without dead ends: 107 [2022-11-19 06:36:12,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=190, Invalid=2458, Unknown=112, NotChecked=102, Total=2862 [2022-11-19 06:36:12,380 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:36:12,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 241 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 0 Unknown, 276 Unchecked, 0.7s Time] [2022-11-19 06:36:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-19 06:36:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-11-19 06:36:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 70 states have internal predecessors, (82), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (35), 24 states have call predecessors, (35), 25 states have call successors, (35) [2022-11-19 06:36:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 143 transitions. [2022-11-19 06:36:12,429 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 143 transitions. Word has length 46 [2022-11-19 06:36:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:36:12,429 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 143 transitions. [2022-11-19 06:36:12,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:36:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 143 transitions. [2022-11-19 06:36:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:36:12,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:36:12,431 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:36:12,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:36:12,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:36:12,638 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:36:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:36:12,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2001458783, now seen corresponding path program 1 times [2022-11-19 06:36:12,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:36:12,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176823850] [2022-11-19 06:36:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:36:12,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:36:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:36:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:36:13,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:36:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176823850] [2022-11-19 06:36:13,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176823850] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:36:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105817907] [2022-11-19 06:36:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:36:13,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:36:13,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:36:13,447 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:36:13,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:36:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:36:13,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-19 06:36:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:36:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:36:18,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:36:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:36:18,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105817907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:36:18,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295295538] [2022-11-19 06:36:18,679 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:36:18,679 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:36:18,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:36:18,680 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:36:18,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:36:18,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:18,760 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:36:18,763 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 [2022-11-19 06:36:18,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:18,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 06:36:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:36:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:36:19,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:36:19,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:36:19,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:36:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:36:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:36:19,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:19,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:36:19,906 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 122 for LOIs [2022-11-19 06:36:20,852 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 172 for LOIs [2022-11-19 06:36:20,920 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:36:20,939 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:36:21,011 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:36:30,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1295295538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:36:30,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:36:30,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-19 06:36:30,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989395952] [2022-11-19 06:36:30,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:36:30,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 06:36:30,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:36:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 06:36:30,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1162, Unknown=2, NotChecked=0, Total=1332 [2022-11-19 06:36:30,353 INFO L87 Difference]: Start difference. First operand 107 states and 143 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:36:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:36:31,520 INFO L93 Difference]: Finished difference Result 185 states and 240 transitions. [2022-11-19 06:36:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 06:36:31,521 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-11-19 06:36:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:36:31,522 INFO L225 Difference]: With dead ends: 185 [2022-11-19 06:36:31,522 INFO L226 Difference]: Without dead ends: 116 [2022-11-19 06:36:31,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=188, Invalid=1292, Unknown=2, NotChecked=0, Total=1482 [2022-11-19 06:36:31,524 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:36:31,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 243 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 167 Invalid, 0 Unknown, 37 Unchecked, 0.5s Time] [2022-11-19 06:36:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-19 06:36:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-19 06:36:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 77 states have internal predecessors, (90), 27 states have call successors, (27), 13 states have call predecessors, (27), 15 states have return successors, (37), 25 states have call predecessors, (37), 26 states have call successors, (37) [2022-11-19 06:36:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 154 transitions. [2022-11-19 06:36:31,567 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 154 transitions. Word has length 47 [2022-11-19 06:36:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:36:31,568 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 154 transitions. [2022-11-19 06:36:31,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:36:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 154 transitions. [2022-11-19 06:36:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 06:36:31,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:36:31,570 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:36:31,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:36:31,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:36:31,777 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:36:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:36:31,777 INFO L85 PathProgramCache]: Analyzing trace with hash -288172042, now seen corresponding path program 1 times [2022-11-19 06:36:31,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:36:31,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262446624] [2022-11-19 06:36:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:36:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:36:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:36:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:36:32,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:36:32,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262446624] [2022-11-19 06:36:32,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262446624] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:36:32,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62081933] [2022-11-19 06:36:32,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:36:32,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:36:32,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:36:32,575 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:36:32,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:36:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:36:32,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-19 06:36:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:36:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:36:35,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:36:37,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 06:36:37,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62081933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:36:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402727080] [2022-11-19 06:36:37,496 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:36:37,496 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:36:37,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:36:37,497 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:36:37,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:36:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,582 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:36:37,583 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 [2022-11-19 06:36:37,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 06:36:37,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:36:37,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:36:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:36:37,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:36:37,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:37,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,035 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:36:38,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:36:38,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-19 06:36:38,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:36:38,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:36:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:38,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:36:38,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:36:38,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:38,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:38,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:38,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:38,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:38,924 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-19 06:36:38,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-19 06:36:39,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:39,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:39,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:39,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:39,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:39,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:39,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:39,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:39,318 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-19 06:36:39,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 692 treesize of output 695 [2022-11-19 06:36:39,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:36:39,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:36:39,680 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-19 06:36:39,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 652 treesize of output 682 [2022-11-19 06:36:39,843 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-19 06:36:39,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-11-19 06:36:39,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:36:39,917 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-19 06:36:39,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-11-19 06:36:39,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-19 06:37:06,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:37:06,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:06,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:37:06,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:06,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 06:37:06,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:06,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-19 06:37:06,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:06,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-19 06:37:06,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:37:06,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:06,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:37:06,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:06,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:37:06,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:06,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:37:06,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:06,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:37:07,004 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-19 06:37:07,879 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 154 for LOIs [2022-11-19 06:37:07,928 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:37:07,945 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:37:08,006 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:14,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1402727080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:14,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:37:14,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-19 06:37:14,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734869361] [2022-11-19 06:37:14,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:14,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 06:37:14,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:14,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 06:37:14,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 06:37:14,894 INFO L87 Difference]: Start difference. First operand 116 states and 154 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:37:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:16,110 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2022-11-19 06:37:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 06:37:16,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-19 06:37:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:16,114 INFO L225 Difference]: With dead ends: 178 [2022-11-19 06:37:16,114 INFO L226 Difference]: Without dead ends: 125 [2022-11-19 06:37:16,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 06:37:16,115 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:16,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 214 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 384 Invalid, 0 Unknown, 177 Unchecked, 0.9s Time] [2022-11-19 06:37:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-19 06:37:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-11-19 06:37:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.2278481012658229) internal successors, (97), 84 states have internal predecessors, (97), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (39), 26 states have call predecessors, (39), 27 states have call successors, (39) [2022-11-19 06:37:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 164 transitions. [2022-11-19 06:37:16,168 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 164 transitions. Word has length 48 [2022-11-19 06:37:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:16,169 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 164 transitions. [2022-11-19 06:37:16,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:37:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 164 transitions. [2022-11-19 06:37:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 06:37:16,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:16,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:16,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 06:37:16,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:16,378 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:16,378 INFO L85 PathProgramCache]: Analyzing trace with hash -963369005, now seen corresponding path program 1 times [2022-11-19 06:37:16,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:16,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095215875] [2022-11-19 06:37:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:16,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 06:37:16,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095215875] [2022-11-19 06:37:16,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095215875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:37:16,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715788111] [2022-11-19 06:37:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:16,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:16,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:16,599 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:16,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:37:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-19 06:37:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:17,030 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-19 06:37:17,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-19 06:37:17,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-19 06:37:17,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 06:37:17,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 19 [2022-11-19 06:37:17,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:37:17,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-19 06:37:33,773 WARN L233 SmtUtils]: Spent 12.73s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:37:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:37:37,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:37:42,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715788111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:42,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071638236] [2022-11-19 06:37:42,549 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:37:42,550 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:42,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:42,551 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:42,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:42,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,617 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:37:42,618 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 46 [2022-11-19 06:37:42,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,679 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:37:42,679 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 [2022-11-19 06:37:42,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:37:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:37:42,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:42,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:37:42,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:37:43,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:37:43,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:37:43,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:37:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:43,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:37:44,631 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 125 for LOIs [2022-11-19 06:37:44,702 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 145 for LOIs [2022-11-19 06:37:46,314 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 06:37:46,316 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:37:46,336 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:37:46,412 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:00,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5200#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) (not (= |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7| 3)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) 16) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) 0) |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) 0) 16) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) 24) |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) 24) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) 16) 0) (not (= |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7| 0)) (not (= |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7| 2)) (<= 0 |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7|) (not (= |v_ULTIMATE.start_aws_linked_list_begin_#in~list#1.base_BEFORE_CALL_7| 4)))) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= 32 (select |#length| 2)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:00,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:00,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:38:00,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 17, 11] total 29 [2022-11-19 06:38:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510322277] [2022-11-19 06:38:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-19 06:38:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-19 06:38:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=2718, Unknown=1, NotChecked=0, Total=3080 [2022-11-19 06:38:00,743 INFO L87 Difference]: Start difference. First operand 125 states and 164 transitions. Second operand has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-19 06:38:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:03,773 INFO L93 Difference]: Finished difference Result 292 states and 438 transitions. [2022-11-19 06:38:03,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-19 06:38:03,774 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) Word has length 48 [2022-11-19 06:38:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:03,778 INFO L225 Difference]: With dead ends: 292 [2022-11-19 06:38:03,779 INFO L226 Difference]: Without dead ends: 217 [2022-11-19 06:38:03,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=482, Invalid=4209, Unknown=1, NotChecked=0, Total=4692 [2022-11-19 06:38:03,781 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 68 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:03,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 748 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 610 Invalid, 0 Unknown, 235 Unchecked, 1.0s Time] [2022-11-19 06:38:03,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-19 06:38:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 196. [2022-11-19 06:38:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 124 states have (on average 1.2580645161290323) internal successors, (156), 133 states have internal predecessors, (156), 47 states have call successors, (47), 17 states have call predecessors, (47), 24 states have return successors, (91), 45 states have call predecessors, (91), 46 states have call successors, (91) [2022-11-19 06:38:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 294 transitions. [2022-11-19 06:38:03,864 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 294 transitions. Word has length 48 [2022-11-19 06:38:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:03,864 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 294 transitions. [2022-11-19 06:38:03,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2022-11-19 06:38:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 294 transitions. [2022-11-19 06:38:03,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 06:38:03,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:03,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:03,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:04,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:38:04,075 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1615843155, now seen corresponding path program 1 times [2022-11-19 06:38:04,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:04,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818792415] [2022-11-19 06:38:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 06:38:04,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818792415] [2022-11-19 06:38:04,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818792415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:04,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141323424] [2022-11-19 06:38:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:04,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:04,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:04,318 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:04,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:38:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:04,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:38:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 06:38:04,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:38:04,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141323424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:04,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:38:04,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-19 06:38:04,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498459886] [2022-11-19 06:38:04,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:04,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:38:04,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:04,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:38:04,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:38:04,727 INFO L87 Difference]: Start difference. First operand 196 states and 294 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:38:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:05,035 INFO L93 Difference]: Finished difference Result 299 states and 454 transitions. [2022-11-19 06:38:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:38:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-19 06:38:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:05,038 INFO L225 Difference]: With dead ends: 299 [2022-11-19 06:38:05,039 INFO L226 Difference]: Without dead ends: 196 [2022-11-19 06:38:05,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 06:38:05,040 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:05,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 166 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:38:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-19 06:38:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-11-19 06:38:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 124 states have (on average 1.2338709677419355) internal successors, (153), 133 states have internal predecessors, (153), 47 states have call successors, (47), 17 states have call predecessors, (47), 24 states have return successors, (91), 45 states have call predecessors, (91), 46 states have call successors, (91) [2022-11-19 06:38:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 291 transitions. [2022-11-19 06:38:05,135 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 291 transitions. Word has length 52 [2022-11-19 06:38:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:05,136 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 291 transitions. [2022-11-19 06:38:05,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:38:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 291 transitions. [2022-11-19 06:38:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-19 06:38:05,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:05,138 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:05,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:05,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 06:38:05,346 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:05,347 INFO L85 PathProgramCache]: Analyzing trace with hash 961107576, now seen corresponding path program 1 times [2022-11-19 06:38:05,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145865637] [2022-11-19 06:38:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:05,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:38:05,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:05,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145865637] [2022-11-19 06:38:05,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145865637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:05,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456308074] [2022-11-19 06:38:05,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:05,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:05,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:05,554 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:05,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:38:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:05,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:38:05,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:38:05,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:38:05,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456308074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:05,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:38:05,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-19 06:38:05,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613313968] [2022-11-19 06:38:05,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:05,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:38:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:05,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:38:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:38:05,944 INFO L87 Difference]: Start difference. First operand 196 states and 291 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:38:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:06,306 INFO L93 Difference]: Finished difference Result 309 states and 463 transitions. [2022-11-19 06:38:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:38:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2022-11-19 06:38:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:06,309 INFO L225 Difference]: With dead ends: 309 [2022-11-19 06:38:06,310 INFO L226 Difference]: Without dead ends: 205 [2022-11-19 06:38:06,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:38:06,312 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 54 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:06,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 197 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:38:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-19 06:38:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2022-11-19 06:38:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 126 states have (on average 1.2222222222222223) internal successors, (154), 135 states have internal predecessors, (154), 48 states have call successors, (48), 17 states have call predecessors, (48), 24 states have return successors, (93), 46 states have call predecessors, (93), 47 states have call successors, (93) [2022-11-19 06:38:06,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 295 transitions. [2022-11-19 06:38:06,449 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 295 transitions. Word has length 55 [2022-11-19 06:38:06,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:06,452 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 295 transitions. [2022-11-19 06:38:06,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 06:38:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 295 transitions. [2022-11-19 06:38:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 06:38:06,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:06,463 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:06,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:06,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:06,672 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:06,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1875676065, now seen corresponding path program 1 times [2022-11-19 06:38:06,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:06,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445743418] [2022-11-19 06:38:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:06,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-19 06:38:06,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:06,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445743418] [2022-11-19 06:38:06,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445743418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:06,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131809247] [2022-11-19 06:38:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:06,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:06,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:06,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:06,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 06:38:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-19 06:38:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 06:38:16,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 06:38:22,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131809247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115959983] [2022-11-19 06:38:22,774 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 06:38:22,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:22,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:22,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:22,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:22,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:22,855 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:38:22,855 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 [2022-11-19 06:38:22,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:22,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 06:38:23,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:38:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:38:23,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:38:23,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:38:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:38:23,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:38:23,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:38:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:23,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:38:23,982 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 122 for LOIs [2022-11-19 06:38:24,949 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 169 for LOIs [2022-11-19 06:38:25,020 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:38:25,037 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:38:25,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:34,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2115959983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:34,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:38:34,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 11] total 45 [2022-11-19 06:38:34,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585795798] [2022-11-19 06:38:34,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:34,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:38:34,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:38:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1753, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 06:38:34,368 INFO L87 Difference]: Start difference. First operand 199 states and 295 transitions. Second operand has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:38:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:38,899 INFO L93 Difference]: Finished difference Result 287 states and 410 transitions. [2022-11-19 06:38:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 06:38:38,900 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 59 [2022-11-19 06:38:38,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:38,902 INFO L225 Difference]: With dead ends: 287 [2022-11-19 06:38:38,902 INFO L226 Difference]: Without dead ends: 198 [2022-11-19 06:38:38,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 126 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=331, Invalid=2119, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 06:38:38,904 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 111 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:38,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 172 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 446 Invalid, 0 Unknown, 96 Unchecked, 1.5s Time] [2022-11-19 06:38:38,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-19 06:38:38,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2022-11-19 06:38:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 132 states have internal predecessors, (150), 48 states have call successors, (48), 17 states have call predecessors, (48), 23 states have return successors, (92), 46 states have call predecessors, (92), 47 states have call successors, (92) [2022-11-19 06:38:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 290 transitions. [2022-11-19 06:38:38,985 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 290 transitions. Word has length 59 [2022-11-19 06:38:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:38,985 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 290 transitions. [2022-11-19 06:38:38,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:38:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 290 transitions. [2022-11-19 06:38:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 06:38:38,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:38,987 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:38,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:39,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 06:38:39,194 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:39,195 INFO L85 PathProgramCache]: Analyzing trace with hash -113358028, now seen corresponding path program 1 times [2022-11-19 06:38:39,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:39,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494039204] [2022-11-19 06:38:39,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:39,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:39,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 06:38:39,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:39,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494039204] [2022-11-19 06:38:39,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494039204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:39,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305505155] [2022-11-19 06:38:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:39,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:39,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:39,479 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:39,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 06:38:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-19 06:38:39,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:39,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-19 06:38:39,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:39,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:38:40,048 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 06:38:40,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 104 [2022-11-19 06:38:40,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:40,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 82 [2022-11-19 06:38:40,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-19 06:38:40,156 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_62 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| Int) (v_DerPreprocessor_61 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|))) (let ((.cse0 (select .cse1 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_62) .cse0 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_62) .cse0)) (= .cse0 (select .cse1 24)) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|) (= (select v_DerPreprocessor_62 24) .cse0))))) is different from true [2022-11-19 06:38:40,849 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_62 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| Int) (v_DerPreprocessor_61 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|))) (let ((.cse0 (select .cse1 0))) (and (= .cse0 (select v_DerPreprocessor_62 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|) (= .cse0 (select .cse1 24)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|) (not (= .cse0 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| v_DerPreprocessor_62) .cse0 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| v_DerPreprocessor_62) .cse0) (select |c_#memory_$Pointer$.base| .cse0)))))) (exists ((v_DerPreprocessor_63 (Array Int Int)) (v_DerPreprocessor_64 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|))) (let ((.cse2 (select .cse3 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_64) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_63) .cse2 v_DerPreprocessor_64) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_63) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (= .cse2 (select v_DerPreprocessor_63 24)) (not (= .cse2 0)) (= .cse2 (select .cse3 24)) (<= (+ 2 .cse2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|)))))) is different from true [2022-11-19 06:38:41,329 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_63 (Array Int Int)) (v_DerPreprocessor_64 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|))) (let ((.cse0 (select .cse1 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_64) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_63) .cse0 v_DerPreprocessor_64) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_63) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select v_DerPreprocessor_63 24)) (not (= .cse0 0)) (= .cse0 (select .cse1 24)) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|))))) (exists ((v_DerPreprocessor_65 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| Int) (v_DerPreprocessor_66 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|))) (let ((.cse2 (select .cse3 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|) (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_66) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| v_DerPreprocessor_65) .cse2 v_DerPreprocessor_66) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| v_DerPreprocessor_65) .cse2)) (= .cse2 (select .cse3 24)) (= .cse2 (select v_DerPreprocessor_65 24)) (<= (+ .cse2 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|) (not (= .cse2 0)))))) (exists ((v_DerPreprocessor_62 (Array Int Int)) (v_DerPreprocessor_61 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46| Int)) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46|))) (let ((.cse4 (select .cse5 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46|) (= (select v_DerPreprocessor_62 24) .cse4) (not (= .cse4 0)) (<= (+ 2 .cse4) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46|) (= (select .cse5 24) .cse4) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46| v_DerPreprocessor_62) .cse4 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46| v_DerPreprocessor_62) .cse4) (select |c_#memory_$Pointer$.base| .cse4))))))) is different from true [2022-11-19 06:39:26,160 WARN L233 SmtUtils]: Spent 39.62s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:39:30,516 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46| Int) (v_DerPreprocessor_67 (Array Int Int)) (v_DerPreprocessor_68 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46|))) (let ((.cse0 (select .cse1 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46|) (not (= .cse0 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_68) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46| v_DerPreprocessor_67) .cse0 v_DerPreprocessor_68) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46| v_DerPreprocessor_67) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46|) (= (select .cse1 24) .cse0) (= .cse0 (select v_DerPreprocessor_67 24)))))) (exists ((v_DerPreprocessor_63 (Array Int Int)) (v_DerPreprocessor_64 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|))) (let ((.cse2 (select .cse3 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_64) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_63) .cse2 v_DerPreprocessor_64) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_63) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (= .cse2 (select v_DerPreprocessor_63 24)) (not (= .cse2 0)) (= .cse2 (select .cse3 24)) (<= (+ 2 .cse2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|))))) (exists ((v_DerPreprocessor_65 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| Int) (v_DerPreprocessor_66 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|))) (let ((.cse4 (select .cse5 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_66) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| v_DerPreprocessor_65) .cse4 v_DerPreprocessor_66) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| v_DerPreprocessor_65) .cse4)) (= .cse4 (select .cse5 24)) (= .cse4 (select v_DerPreprocessor_65 24)) (<= (+ .cse4 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|) (not (= .cse4 0)))))) (exists ((v_DerPreprocessor_62 (Array Int Int)) (v_DerPreprocessor_61 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| Int)) (let ((.cse8 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|))) (let ((.cse7 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|)) (.cse6 (select .cse8 0))) (and (not (= .cse6 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) (= (select .cse7 8) 0) (= .cse6 (select .cse8 24)) (= (select .cse8 8) 0) (= (select .cse7 16) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| v_DerPreprocessor_62) .cse6 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| v_DerPreprocessor_62) .cse6) (select |c_#memory_$Pointer$.base| .cse6)) (= (select v_DerPreprocessor_62 24) .cse6) (= (select .cse8 16) 0) (<= (+ 2 .cse6) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|)))))) is different from true [2022-11-19 06:39:31,502 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46| Int) (v_DerPreprocessor_67 (Array Int Int)) (v_DerPreprocessor_68 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46|))) (let ((.cse0 (select .cse1 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46|) (not (= .cse0 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_68) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46| v_DerPreprocessor_67) .cse0 v_DerPreprocessor_68) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46| v_DerPreprocessor_67) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_46|) (= (select .cse1 24) .cse0) (= .cse0 (select v_DerPreprocessor_67 24)))))) (exists ((v_DerPreprocessor_63 (Array Int Int)) (v_DerPreprocessor_64 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|))) (let ((.cse2 (select .cse3 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_64) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_63) .cse2 v_DerPreprocessor_64) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155| v_DerPreprocessor_63) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (= .cse2 (select v_DerPreprocessor_63 24)) (not (= .cse2 0)) (= .cse2 (select .cse3 24)) (<= (+ 2 .cse2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_155|))))) (exists ((v_DerPreprocessor_65 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| Int) (v_DerPreprocessor_66 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|))) (let ((.cse4 (select .cse5 0))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_66) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| v_DerPreprocessor_65) .cse4 v_DerPreprocessor_66) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156| v_DerPreprocessor_65) .cse4)) (= .cse4 (select .cse5 24)) (= .cse4 (select v_DerPreprocessor_65 24)) (<= (+ .cse4 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_156|) (not (= .cse4 0)))))) (exists ((v_DerPreprocessor_70 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_48| Int) (v_DerPreprocessor_69 (Array Int Int))) (let ((.cse6 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_48|))) (let ((.cse7 (select .cse6 0)) (.cse8 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_48|))) (and (= (select .cse6 24) .cse7) (<= (+ .cse7 2) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_48|) (= (select .cse6 8) 0) (= (select |c_#memory_$Pointer$.base| .cse7) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse7 v_DerPreprocessor_70) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_48| v_DerPreprocessor_69) .cse7 v_DerPreprocessor_70) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_48| v_DerPreprocessor_69) .cse7)) (= .cse7 (select v_DerPreprocessor_69 24)) (= (select .cse8 16) 0) (not (= .cse7 0)) (= (select .cse8 8) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_48|) (= (select .cse6 16) 0))))) (exists ((v_DerPreprocessor_62 (Array Int Int)) (v_DerPreprocessor_61 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| Int)) (let ((.cse11 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|))) (let ((.cse10 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|)) (.cse9 (select .cse11 0))) (and (not (= .cse9 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|) (= (select .cse10 8) 0) (= .cse9 (select .cse11 24)) (= (select .cse11 8) 0) (= (select .cse10 16) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse9 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| v_DerPreprocessor_62) .cse9 v_DerPreprocessor_61) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47| v_DerPreprocessor_62) .cse9) (select |c_#memory_$Pointer$.base| .cse9)) (= (select v_DerPreprocessor_62 24) .cse9) (= (select .cse11 16) 0) (<= (+ 2 .cse9) |v_ULTIMATE.start_aws_linked_list_begin_~list#1.base_BEFORE_CALL_47|)))))) is different from true [2022-11-19 06:39:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 5 refuted. 2 times theorem prover too weak. 6 trivial. 26 not checked. [2022-11-19 06:39:33,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:39:40,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305505155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:40,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [386604667] [2022-11-19 06:39:40,395 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-19 06:39:40,395 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:40,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:40,396 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:40,396 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,476 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:39:40,476 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 [2022-11-19 06:39:40,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 06:39:40,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:39:40,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:39:40,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:39:40,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:39:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:40,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:40,914 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 06:39:40,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 06:39:40,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:40,987 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 06:39:40,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 06:39:41,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,118 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:39:41,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:39:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:39:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:39:41,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-19 06:39:41,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:39:41,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:39:41,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 06:39:41,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 06:39:41,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:41,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 06:39:41,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:39:41,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:39:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:39:41,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:39:41,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:41,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:39:42,586 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 44 for LOIs [2022-11-19 06:39:43,518 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 155 for LOIs [2022-11-19 06:39:43,582 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:39:43,605 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:39:43,710 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:39:54,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [386604667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:39:54,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:39:54,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 25, 7] total 53 [2022-11-19 06:39:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043918463] [2022-11-19 06:39:54,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:39:54,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:39:54,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:39:54,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2071, Unknown=28, NotChecked=480, Total=2756 [2022-11-19 06:39:54,353 INFO L87 Difference]: Start difference. First operand 196 states and 290 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:39:56,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:56,486 INFO L93 Difference]: Finished difference Result 271 states and 385 transitions. [2022-11-19 06:39:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 06:39:56,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2022-11-19 06:39:56,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:56,489 INFO L225 Difference]: With dead ends: 271 [2022-11-19 06:39:56,489 INFO L226 Difference]: Without dead ends: 209 [2022-11-19 06:39:56,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=209, Invalid=2435, Unknown=28, NotChecked=520, Total=3192 [2022-11-19 06:39:56,491 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 48 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:56,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 167 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 281 Invalid, 0 Unknown, 163 Unchecked, 0.8s Time] [2022-11-19 06:39:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-19 06:39:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2022-11-19 06:39:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 122 states have (on average 1.180327868852459) internal successors, (144), 131 states have internal predecessors, (144), 48 states have call successors, (48), 17 states have call predecessors, (48), 23 states have return successors, (77), 45 states have call predecessors, (77), 47 states have call successors, (77) [2022-11-19 06:39:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 269 transitions. [2022-11-19 06:39:56,596 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 269 transitions. Word has length 60 [2022-11-19 06:39:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:56,597 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 269 transitions. [2022-11-19 06:39:56,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:39:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 269 transitions. [2022-11-19 06:39:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 06:39:56,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:56,599 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:39:56,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 06:39:56,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 06:39:56,807 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:56,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:56,807 INFO L85 PathProgramCache]: Analyzing trace with hash -129172476, now seen corresponding path program 1 times [2022-11-19 06:39:56,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:56,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593797047] [2022-11-19 06:39:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:56,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 06:39:57,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:57,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593797047] [2022-11-19 06:39:57,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593797047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:39:57,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611456625] [2022-11-19 06:39:57,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:57,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:57,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:57,087 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:57,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 06:39:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:57,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 06:39:57,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-19 06:39:57,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-19 06:39:57,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611456625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [433253975] [2022-11-19 06:39:57,950 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:39:57,950 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:57,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:57,950 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:57,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,049 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:39:58,049 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 [2022-11-19 06:39:58,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-19 06:39:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:39:58,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:39:58,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:39:58,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:39:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:39:58,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:58,544 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 06:39:58,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 06:39:58,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:58,620 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 06:39:58,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 06:39:58,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:39:58,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,786 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-19 06:39:58,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-19 06:39:58,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:58,940 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:39:58,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:39:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:59,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:39:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:59,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 06:39:59,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:59,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-19 06:39:59,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:59,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 06:39:59,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:39:59,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:39:59,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:59,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:39:59,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:59,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:39:59,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:59,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:59,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:39:59,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:59,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:40:01,792 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-19 06:40:01,816 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 06:40:02,636 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 06:40:02,637 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:40:02,655 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:40:02,719 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:11,891 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10430#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133| 16)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133| 24)) 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_135|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_133| 24))))) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:40:11,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:11,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:11,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-11-19 06:40:11,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825888251] [2022-11-19 06:40:11,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:11,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 06:40:11,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:11,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 06:40:11,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 06:40:11,893 INFO L87 Difference]: Start difference. First operand 194 states and 269 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-19 06:40:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:12,368 INFO L93 Difference]: Finished difference Result 296 states and 434 transitions. [2022-11-19 06:40:12,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:40:12,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2022-11-19 06:40:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:12,379 INFO L225 Difference]: With dead ends: 296 [2022-11-19 06:40:12,379 INFO L226 Difference]: Without dead ends: 209 [2022-11-19 06:40:12,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 06:40:12,385 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:12,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 472 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:40:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-19 06:40:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2022-11-19 06:40:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 131 states have internal predecessors, (142), 48 states have call successors, (48), 17 states have call predecessors, (48), 23 states have return successors, (73), 45 states have call predecessors, (73), 47 states have call successors, (73) [2022-11-19 06:40:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 263 transitions. [2022-11-19 06:40:12,512 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 263 transitions. Word has length 63 [2022-11-19 06:40:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:12,514 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 263 transitions. [2022-11-19 06:40:12,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-19 06:40:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 263 transitions. [2022-11-19 06:40:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-19 06:40:12,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:12,519 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:12,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:12,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:12,738 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:12,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1966738942, now seen corresponding path program 1 times [2022-11-19 06:40:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:12,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116843125] [2022-11-19 06:40:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 06:40:13,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:13,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116843125] [2022-11-19 06:40:13,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116843125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:13,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707114271] [2022-11-19 06:40:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:13,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:13,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:13,068 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:13,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 06:40:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:13,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-19 06:40:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:15,695 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_66| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_66|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_66| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_66|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_66|) 0)))) is different from true [2022-11-19 06:40:16,825 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:40:16,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2022-11-19 06:40:16,834 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-19 06:40:16,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2022-11-19 06:40:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-11-19 06:40:16,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:17,654 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-19 06:40:17,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-11-19 06:40:17,670 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-19 06:40:17,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2022-11-19 06:40:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 06:40:17,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707114271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:17,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791414778] [2022-11-19 06:40:17,711 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:40:17,711 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:17,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:17,712 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:17,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:17,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,792 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:40:17,792 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 46 [2022-11-19 06:40:17,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,876 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:40:17,877 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 [2022-11-19 06:40:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:40:18,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:40:18,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:40:18,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:40:18,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,311 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 06:40:18,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-19 06:40:18,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,432 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:40:18,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:40:18,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-19 06:40:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:40:18,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:40:18,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:40:18,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:40:18,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:40:18,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:40:18,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 06:40:18,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:40:18,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:40:18,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:40:18,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:40:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:40:18,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:18,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:40:21,374 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-19 06:40:21,395 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-19 06:40:22,231 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-19 06:40:22,233 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:40:22,266 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:40:22,333 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:33,158 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11603#(and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155| 24))) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_157|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_155|))) (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:40:33,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:33,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:33,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17, 14] total 30 [2022-11-19 06:40:33,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324846875] [2022-11-19 06:40:33,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:33,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 06:40:33,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:33,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 06:40:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2833, Unknown=1, NotChecked=108, Total=3192 [2022-11-19 06:40:33,161 INFO L87 Difference]: Start difference. First operand 194 states and 263 transitions. Second operand has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-19 06:40:36,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:36,017 INFO L93 Difference]: Finished difference Result 351 states and 498 transitions. [2022-11-19 06:40:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 06:40:36,018 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 65 [2022-11-19 06:40:36,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:36,019 INFO L225 Difference]: With dead ends: 351 [2022-11-19 06:40:36,020 INFO L226 Difference]: Without dead ends: 244 [2022-11-19 06:40:36,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=566, Invalid=6747, Unknown=1, NotChecked=168, Total=7482 [2022-11-19 06:40:36,023 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 156 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:36,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 561 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 910 Invalid, 0 Unknown, 292 Unchecked, 1.1s Time] [2022-11-19 06:40:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-19 06:40:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 214. [2022-11-19 06:40:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 138 states have (on average 1.1594202898550725) internal successors, (160), 145 states have internal predecessors, (160), 49 states have call successors, (49), 21 states have call predecessors, (49), 26 states have return successors, (66), 47 states have call predecessors, (66), 48 states have call successors, (66) [2022-11-19 06:40:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 275 transitions. [2022-11-19 06:40:36,109 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 275 transitions. Word has length 65 [2022-11-19 06:40:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:36,109 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 275 transitions. [2022-11-19 06:40:36,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-19 06:40:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 275 transitions. [2022-11-19 06:40:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 06:40:36,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:36,111 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:36,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-19 06:40:36,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:40:36,312 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:36,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:36,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1776148813, now seen corresponding path program 1 times [2022-11-19 06:40:36,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:36,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306064614] [2022-11-19 06:40:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:36,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 06:40:39,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:39,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306064614] [2022-11-19 06:40:39,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306064614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:39,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256536549] [2022-11-19 06:40:39,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:39,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:39,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:39,239 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:39,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 06:40:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-19 06:40:39,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:40:44,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:41:45,109 INFO L321 Elim1Store]: treesize reduction 17, result has 80.5 percent of original size [2022-11-19 06:41:45,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 131 [2022-11-19 06:41:45,773 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-11-19 06:41:45,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 150 [2022-11-19 06:41:49,835 INFO L321 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2022-11-19 06:41:49,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 1 [2022-11-19 06:41:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:41:50,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256536549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:41:50,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2026374518] [2022-11-19 06:41:50,953 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:41:50,954 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:41:50,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:41:50,954 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:41:50,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:41:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,247 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:41:51,247 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 46 [2022-11-19 06:41:51,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,560 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:41:51,561 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 [2022-11-19 06:41:51,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:41:51,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:41:51,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:41:51,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:51,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:41:52,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:41:52,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:41:52,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-19 06:41:52,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:41:52,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:42:02,546 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 141 for LOIs [2022-11-19 06:42:02,806 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 157 for LOIs [2022-11-19 06:42:04,109 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-11-19 06:42:04,152 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:42:04,171 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:42:04,235 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:02,791 WARN L233 SmtUtils]: Spent 5.25s on a formula simplification. DAG size of input: 218 DAG size of output: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:08,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12981#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 8) 0) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|)) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 1) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 24) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 16) 0) (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 0) 16) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98| 0)) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_98|))) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:08,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:08,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:08,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 21] total 55 [2022-11-19 06:43:08,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419424277] [2022-11-19 06:43:08,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:08,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-19 06:43:08,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:08,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-19 06:43:08,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=6320, Unknown=8, NotChecked=0, Total=6806 [2022-11-19 06:43:08,940 INFO L87 Difference]: Start difference. First operand 214 states and 275 transitions. Second operand has 55 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 45 states have internal predecessors, (102), 17 states have call successors, (29), 3 states have call predecessors, (29), 15 states have return successors, (29), 19 states have call predecessors, (29), 16 states have call successors, (29) [2022-11-19 06:43:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:55,707 INFO L93 Difference]: Finished difference Result 511 states and 769 transitions. [2022-11-19 06:43:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-19 06:43:55,708 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 45 states have internal predecessors, (102), 17 states have call successors, (29), 3 states have call predecessors, (29), 15 states have return successors, (29), 19 states have call predecessors, (29), 16 states have call successors, (29) Word has length 67 [2022-11-19 06:43:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:55,712 INFO L225 Difference]: With dead ends: 511 [2022-11-19 06:43:55,712 INFO L226 Difference]: Without dead ends: 431 [2022-11-19 06:43:55,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 141 SyntacticMatches, 12 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5416 ImplicationChecksByTransitivity, 122.2s TimeCoverageRelationStatistics Valid=1321, Invalid=15701, Unknown=8, NotChecked=0, Total=17030 [2022-11-19 06:43:55,717 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 470 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 3229 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 4028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 3229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:55,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1235 Invalid, 4028 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [454 Valid, 3229 Invalid, 0 Unknown, 345 Unchecked, 18.7s Time] [2022-11-19 06:43:55,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-19 06:43:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 322. [2022-11-19 06:43:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 219 states have internal predecessors, (237), 75 states have call successors, (75), 29 states have call predecessors, (75), 38 states have return successors, (107), 73 states have call predecessors, (107), 74 states have call successors, (107) [2022-11-19 06:43:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 419 transitions. [2022-11-19 06:43:55,858 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 419 transitions. Word has length 67 [2022-11-19 06:43:55,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:55,859 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 419 transitions. [2022-11-19 06:43:55,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 45 states have (on average 2.2666666666666666) internal successors, (102), 45 states have internal predecessors, (102), 17 states have call successors, (29), 3 states have call predecessors, (29), 15 states have return successors, (29), 19 states have call predecessors, (29), 16 states have call successors, (29) [2022-11-19 06:43:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 419 transitions. [2022-11-19 06:43:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-19 06:43:55,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:55,860 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:55,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:56,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 06:43:56,061 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:56,061 INFO L85 PathProgramCache]: Analyzing trace with hash -584048548, now seen corresponding path program 1 times [2022-11-19 06:43:56,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:56,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426429952] [2022-11-19 06:43:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:56,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 06:43:56,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:56,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426429952] [2022-11-19 06:43:56,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426429952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:56,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:56,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 06:43:56,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812629652] [2022-11-19 06:43:56,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:56,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:43:56,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:56,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:43:56,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:43:56,660 INFO L87 Difference]: Start difference. First operand 322 states and 419 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-19 06:43:57,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:57,838 INFO L93 Difference]: Finished difference Result 350 states and 463 transitions. [2022-11-19 06:43:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:43:57,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 71 [2022-11-19 06:43:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:57,841 INFO L225 Difference]: With dead ends: 350 [2022-11-19 06:43:57,841 INFO L226 Difference]: Without dead ends: 348 [2022-11-19 06:43:57,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-19 06:43:57,842 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:57,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 288 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:43:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-19 06:43:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 339. [2022-11-19 06:43:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 217 states have (on average 1.1336405529953917) internal successors, (246), 230 states have internal predecessors, (246), 80 states have call successors, (80), 30 states have call predecessors, (80), 41 states have return successors, (125), 78 states have call predecessors, (125), 79 states have call successors, (125) [2022-11-19 06:43:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 451 transitions. [2022-11-19 06:43:58,046 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 451 transitions. Word has length 71 [2022-11-19 06:43:58,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:58,047 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 451 transitions. [2022-11-19 06:43:58,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-19 06:43:58,047 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 451 transitions. [2022-11-19 06:43:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-19 06:43:58,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:58,049 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:58,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 06:43:58,049 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:58,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1576518315, now seen corresponding path program 1 times [2022-11-19 06:43:58,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:58,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147039171] [2022-11-19 06:43:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:58,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 06:44:11,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147039171] [2022-11-19 06:44:11,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147039171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093974580] [2022-11-19 06:44:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:11,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:11,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:11,897 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:11,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_594bb3e9-d36b-46f2-aff6-f71aa9968ae7/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 06:44:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:12,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 152 conjunts are in the unsatisfiable core [2022-11-19 06:44:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:13,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:44:13,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:44:13,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:13,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-19 06:44:13,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:13,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-19 06:44:13,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:13,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-19 06:44:13,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:13,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-19 06:44:14,287 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-19 06:44:14,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 134 [2022-11-19 06:44:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:14,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 113 [2022-11-19 06:44:14,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:14,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:14,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2022-11-19 06:44:14,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-19 06:44:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:14,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-19 06:45:34,427 WARN L233 SmtUtils]: Spent 35.55s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:46:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 29 refuted. 1 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 06:46:49,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:47:09,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093974580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:47:09,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [105438331] [2022-11-19 06:47:09,028 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-19 06:47:09,028 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:47:09,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:47:09,029 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:47:09,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:47:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:09,329 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-19 06:47:09,329 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 46 [2022-11-19 06:47:09,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:09,653 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-19 06:47:09,654 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 [2022-11-19 06:47:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:09,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-19 06:47:09,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:09,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:09,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:09,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:09,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:47:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:09,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-19 06:47:10,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-19 06:47:10,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-19 06:47:10,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,569 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 06:47:10,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-19 06:47:10,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:47:10,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-19 06:47:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:10,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:47:10,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:10,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-19 06:47:11,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:11,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:11,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:11,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:11,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:11,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:11,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:11,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:11,875 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-19 06:47:11,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-19 06:47:12,104 INFO L217 Elim1Store]: Index analysis took 180 ms [2022-11-19 06:47:12,523 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-19 06:47:12,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 645 treesize of output 656 [2022-11-19 06:47:12,784 INFO L217 Elim1Store]: Index analysis took 197 ms [2022-11-19 06:47:13,346 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-19 06:47:13,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 648 treesize of output 666 [2022-11-19 06:47:13,505 INFO L217 Elim1Store]: Index analysis took 110 ms [2022-11-19 06:47:13,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:13,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:13,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:13,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:13,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:13,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:13,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:14,357 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-19 06:47:14,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 676 treesize of output 685 [2022-11-19 06:47:14,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:14,505 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-19 06:47:14,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-11-19 06:47:14,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:14,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-19 06:47:34,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:34,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:47:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:47:35,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:47:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-19 06:47:35,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:47:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-19 06:47:35,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:47:35,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 06:47:35,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:47:35,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-19 06:47:35,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-19 06:47:35,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:47:35,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-19 06:47:36,634 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2022-11-19 06:47:36,685 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-19 06:47:37,484 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-19 06:47:37,490 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-19 06:47:37,511 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-19 06:47:37,577 INFO L180 IcfgInterpreter]: Interpretation finished