./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW --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 ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- 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-4e7fbc6 [2022-11-23 15:04:17,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:04:18,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:04:18,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:04:18,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:04:18,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:04:18,031 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:04:18,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:04:18,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:04:18,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:04:18,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:04:18,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:04:18,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:04:18,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:04:18,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:04:18,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:04:18,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:04:18,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:04:18,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:04:18,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:04:18,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:04:18,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:04:18,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:04:18,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:04:18,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:04:18,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:04:18,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:04:18,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:04:18,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:04:18,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:04:18,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:04:18,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:04:18,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:04:18,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:04:18,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:04:18,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:04:18,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:04:18,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:04:18,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:04:18,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:04:18,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:04:18,081 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:04:18,112 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:04:18,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:04:18,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:04:18,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:04:18,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:04:18,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:04:18,115 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:04:18,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:04:18,116 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:04:18,116 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:04:18,117 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:04:18,117 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:04:18,118 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:04:18,118 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:04:18,118 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:04:18,119 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:04:18,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:04:18,120 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:04:18,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:04:18,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:04:18,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:04:18,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:04:18,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:04:18,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:04:18,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:04:18,124 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:04:18,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:04:18,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:04:18,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:04:18,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:04:18,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:04:18,126 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:04:18,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:04:18,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:04:18,127 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:04:18,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:04:18,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:04:18,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:04:18,129 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_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2022-11-23 15:04:18,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:04:18,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:04:18,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:04:18,503 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:04:18,503 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:04:18,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-23 15:04:22,065 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:04:22,675 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:04:22,676 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2022-11-23 15:04:22,715 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/data/2d988da08/a6c2bb7bfdf34516955f06c7cde46c22/FLAGc8e7ca841 [2022-11-23 15:04:22,736 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/data/2d988da08/a6c2bb7bfdf34516955f06c7cde46c22 [2022-11-23 15:04:22,742 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:04:22,746 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:04:22,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:04:22,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:04:22,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:04:22,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:22" (1/1) ... [2022-11-23 15:04:22,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f0c38ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:22, skipping insertion in model container [2022-11-23 15:04:22,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:22" (1/1) ... [2022-11-23 15:04:22,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:04:22,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:04:23,250 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-23 15:04:23,259 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-23 15:04:24,459 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,460 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,461 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,462 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,464 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,483 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,484 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,487 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,488 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,491 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,498 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,499 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:24,500 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,043 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 15:04:25,044 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 15:04:25,046 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 15:04:25,076 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 15:04:25,078 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 15:04:25,078 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 15:04:25,079 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 15:04:25,080 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 15:04:25,081 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 15:04:25,082 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 15:04:25,302 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 15:04:25,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:04:25,354 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:04:25,371 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2022-11-23 15:04:25,371 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2022-11-23 15:04:25,422 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,423 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,423 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,424 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,425 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,434 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,435 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,437 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,437 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,439 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,440 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,441 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,441 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:04:25,490 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 15:04:25,499 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 15:04:25,500 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 15:04:25,502 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 15:04:25,510 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 15:04:25,511 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 15:04:25,512 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 15:04:25,514 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 15:04:25,516 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 15:04:25,517 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 15:04:25,573 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 15:04:25,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:04:25,900 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:04:25,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25 WrapperNode [2022-11-23 15:04:25,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:04:25,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:04:25,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:04:25,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:04:25,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,091 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-11-23 15:04:26,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:04:26,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:04:26,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:04:26,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:04:26,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:04:26,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:04:26,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:04:26,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:04:26,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (1/1) ... [2022-11-23 15:04:26,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:04:26,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:26,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:04:26,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:04:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:04:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:04:26,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:04:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-23 15:04:26,295 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-23 15:04:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:04:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-23 15:04:26,296 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-23 15:04:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:04:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:04:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:04:26,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:04:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:04:26,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:04:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:04:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:04:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:04:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-23 15:04:26,300 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-23 15:04:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:04:26,711 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:04:26,713 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:04:27,050 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:04:27,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:04:27,202 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:04:27,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:27 BoogieIcfgContainer [2022-11-23 15:04:27,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:04:27,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:04:27,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:04:27,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:04:27,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:04:22" (1/3) ... [2022-11-23 15:04:27,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7890241c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:27, skipping insertion in model container [2022-11-23 15:04:27,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:25" (2/3) ... [2022-11-23 15:04:27,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7890241c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:27, skipping insertion in model container [2022-11-23 15:04:27,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:27" (3/3) ... [2022-11-23 15:04:27,216 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2022-11-23 15:04:27,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:04:27,241 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:04:27,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:04:27,335 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;@152b70f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:04:27,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:04:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 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) [2022-11-23 15:04:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 15:04:27,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:27,358 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] [2022-11-23 15:04:27,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:04:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:27,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1338419167, now seen corresponding path program 1 times [2022-11-23 15:04:27,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:27,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150235149] [2022-11-23 15:04:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:27,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:04:28,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:28,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150235149] [2022-11-23 15:04:28,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150235149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:04:28,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046699625] [2022-11-23 15:04:28,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:28,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:28,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:28,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:04:28,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:04:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:28,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-23 15:04:28,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:29,049 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 [2022-11-23 15:04:29,069 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 [2022-11-23 15:04:29,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:29,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:29,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:29,202 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 [2022-11-23 15:04:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:29,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:29,234 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 [2022-11-23 15:04:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:04:31,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:04:31,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046699625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:31,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:04:31,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-11-23 15:04:31,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205181471] [2022-11-23 15:04:31,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:31,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:04:31,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:31,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:04:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:04:31,355 INFO L87 Difference]: Start difference. First operand has 45 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 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 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 15:04:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:32,354 INFO L93 Difference]: Finished difference Result 121 states and 170 transitions. [2022-11-23 15:04:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:04:32,357 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-11-23 15:04:32,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:32,368 INFO L225 Difference]: With dead ends: 121 [2022-11-23 15:04:32,368 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 15:04:32,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:04:32,376 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 46 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:32,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 211 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 15:04:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 15:04:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-11-23 15:04:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 47 states have internal predecessors, (58), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-23 15:04:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2022-11-23 15:04:32,452 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 37 [2022-11-23 15:04:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:32,453 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2022-11-23 15:04:32,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 15:04:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2022-11-23 15:04:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 15:04:32,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:32,457 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] [2022-11-23 15:04:32,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 15:04:32,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 15:04:32,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:04:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:32,672 INFO L85 PathProgramCache]: Analyzing trace with hash 2113362132, now seen corresponding path program 1 times [2022-11-23 15:04:32,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:32,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436115110] [2022-11-23 15:04:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:32,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:04:33,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:33,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436115110] [2022-11-23 15:04:33,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436115110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:04:33,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274963805] [2022-11-23 15:04:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:33,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:04:33,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:33,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:04:33,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:04:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:33,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-23 15:04:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:04:33,461 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 18 treesize of output 19 [2022-11-23 15:04:33,489 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 [2022-11-23 15:04:33,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,590 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 [2022-11-23 15:04:33,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,600 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 [2022-11-23 15:04:33,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,637 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 [2022-11-23 15:04:33,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,647 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 32 treesize of output 30 [2022-11-23 15:04:33,791 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-23 15:04:33,791 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 [2022-11-23 15:04:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,810 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 [2022-11-23 15:04:33,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,831 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 [2022-11-23 15:04:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:33,842 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 [2022-11-23 15:04:33,870 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 [2022-11-23 15:04:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:04:35,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:04:40,653 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse2 (+ 8 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse1) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0))))))) is different from false [2022-11-23 15:04:40,801 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 16 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|)) (.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse2 (+ 8 |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_212 Int)) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0)) (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse4 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse6 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset|) 0))))) (forall ((v_ArrVal_212 Int)) (let ((.cse8 (+ |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.offset| 24))) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse7 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse7 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse8) 0))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse0 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse8) 0)))))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse9 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse9 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base|) .cse2) 0)))))) is different from false [2022-11-23 15:04:40,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:04:40,899 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 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-23 15:04:40,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:04:40,953 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 193 treesize of output 167 [2022-11-23 15:04:40,963 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 156 treesize of output 148 [2022-11-23 15:04:40,975 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 73 treesize of output 69 [2022-11-23 15:04:41,052 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 7 treesize of output 3 [2022-11-23 15:04:41,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:04:41,090 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 76 treesize of output 80 [2022-11-23 15:04:41,208 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-23 15:04:41,208 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 [2022-11-23 15:04:41,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:04:41,244 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 [2022-11-23 15:04:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:41,260 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 42 treesize of output 34 [2022-11-23 15:04:41,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:04:41,278 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 [2022-11-23 15:04:41,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:41,288 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 86 treesize of output 68 [2022-11-23 15:04:41,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,307 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-23 15:04:41,308 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 61 treesize of output 44 [2022-11-23 15:04:41,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 20 treesize of output 18 [2022-11-23 15:04:41,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-23 15:04:41,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,365 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-23 15:04:41,366 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 [2022-11-23 15:04:41,374 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-23 15:04:41,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:41,387 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-23 15:04:41,388 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 [2022-11-23 15:04:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-23 15:04:41,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274963805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:04:41,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1752372357] [2022-11-23 15:04:41,549 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-23 15:04:41,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:04:41,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:04:41,561 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:04:41,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:04:41,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:41,701 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:04:41,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-23 15:04:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:41,795 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:04:41,795 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 [2022-11-23 15:04:42,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,169 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 [2022-11-23 15:04:42,203 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 [2022-11-23 15:04:42,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,236 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 [2022-11-23 15:04:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,267 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 [2022-11-23 15:04:42,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,468 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-23 15:04:42,468 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 [2022-11-23 15:04:42,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,512 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 [2022-11-23 15:04:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:42,551 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 [2022-11-23 15:04:42,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,598 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 [2022-11-23 15:04:42,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,622 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 [2022-11-23 15:04:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:42,670 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 [2022-11-23 15:04:43,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:43,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:43,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:43,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:43,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:43,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:43,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:43,542 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-23 15:04:43,543 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 [2022-11-23 15:04:44,185 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-23 15:04:44,186 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 650 treesize of output 680 [2022-11-23 15:04:44,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:44,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:44,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:44,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:44,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:44,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:44,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:44,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:44,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:44,732 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-23 15:04:44,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 14 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 678 treesize of output 687 [2022-11-23 15:04:44,932 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-23 15:04:44,933 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 [2022-11-23 15:04:45,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:45,036 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-23 15:04:45,037 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 [2022-11-23 15:04:45,080 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 [2022-11-23 15:04:55,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:55,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2022-11-23 15:04:55,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:55,947 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 [2022-11-23 15:04:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:55,983 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 [2022-11-23 15:04:56,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:04:56,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:56,006 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 [2022-11-23 15:04:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:56,033 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 [2022-11-23 15:04:56,050 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 [2022-11-23 15:04:56,067 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 [2022-11-23 15:04:56,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:56,098 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 [2022-11-23 15:04:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:56,114 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 [2022-11-23 15:04:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:56,137 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 [2022-11-23 15:04:56,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:04:56,161 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 [2022-11-23 15:04:56,724 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-23 15:04:57,004 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-11-23 15:04:57,072 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:04:57,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:05:01,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1752372357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:01,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:05:01,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 9, 8] total 30 [2022-11-23 15:05:01,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540780] [2022-11-23 15:05:01,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:01,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:05:01,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:01,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:05:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=666, Unknown=6, NotChecked=106, Total=870 [2022-11-23 15:05:01,021 INFO L87 Difference]: Start difference. First operand 79 states and 106 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) [2022-11-23 15:05:03,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:03,543 INFO L93 Difference]: Finished difference Result 142 states and 188 transitions. [2022-11-23 15:05:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 15:05:03,544 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 [2022-11-23 15:05:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:03,546 INFO L225 Difference]: With dead ends: 142 [2022-11-23 15:05:03,546 INFO L226 Difference]: Without dead ends: 105 [2022-11-23 15:05:03,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=113, Invalid=819, Unknown=6, NotChecked=118, Total=1056 [2022-11-23 15:05:03,549 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:03,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 195 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 15:05:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-23 15:05:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2022-11-23 15:05:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 66 states have internal predecessors, (86), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-23 15:05:03,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2022-11-23 15:05:03,601 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 38 [2022-11-23 15:05:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:03,601 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2022-11-23 15:05:03,601 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) [2022-11-23 15:05:03,602 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2022-11-23 15:05:03,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 15:05:03,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:03,613 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] [2022-11-23 15:05:03,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:03,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:03,821 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:03,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:03,822 INFO L85 PathProgramCache]: Analyzing trace with hash -303925925, now seen corresponding path program 1 times [2022-11-23 15:05:03,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:03,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420027161] [2022-11-23 15:05:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:03,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:05:04,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420027161] [2022-11-23 15:05:04,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420027161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:05:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67405400] [2022-11-23 15:05:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:04,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:04,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:04,073 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:05:04,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:05:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:05:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:05:04,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:05:04,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67405400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:04,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:05:04,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-23 15:05:04,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244857687] [2022-11-23 15:05:04,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:04,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:05:04,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:05:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:05:04,379 INFO L87 Difference]: Start difference. First operand 103 states and 137 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) [2022-11-23 15:05:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:04,604 INFO L93 Difference]: Finished difference Result 209 states and 279 transitions. [2022-11-23 15:05:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:05:04,605 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 [2022-11-23 15:05:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:04,612 INFO L225 Difference]: With dead ends: 209 [2022-11-23 15:05:04,612 INFO L226 Difference]: Without dead ends: 113 [2022-11-23 15:05:04,617 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 [2022-11-23 15:05:04,621 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 32 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:04,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 144 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:05:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-23 15:05:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2022-11-23 15:05:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-23 15:05:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2022-11-23 15:05:04,682 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 39 [2022-11-23 15:05:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:04,682 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2022-11-23 15:05:04,683 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) [2022-11-23 15:05:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2022-11-23 15:05:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 15:05:04,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:04,688 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] [2022-11-23 15:05:04,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 15:05:04,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 15:05:04,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash 840951937, now seen corresponding path program 1 times [2022-11-23 15:05:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:04,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787476222] [2022-11-23 15:05:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:04,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:05:05,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:05,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787476222] [2022-11-23 15:05:05,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787476222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:05:05,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059048409] [2022-11-23 15:05:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:05,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:05,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:05,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:05:05,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:05:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:05,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:05:05,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:05:05,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:05:05,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059048409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:05,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:05:05,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-23 15:05:05,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496646839] [2022-11-23 15:05:05,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:05,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:05:05,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:05:05,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-23 15:05:05,510 INFO L87 Difference]: Start difference. First operand 103 states and 135 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) [2022-11-23 15:05:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:05,841 INFO L93 Difference]: Finished difference Result 251 states and 339 transitions. [2022-11-23 15:05:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:05:05,842 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 [2022-11-23 15:05:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:05,848 INFO L225 Difference]: With dead ends: 251 [2022-11-23 15:05:05,848 INFO L226 Difference]: Without dead ends: 153 [2022-11-23 15:05:05,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-23 15:05:05,853 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 62 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:05,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 167 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:05:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-23 15:05:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2022-11-23 15:05:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.323076923076923) internal successors, (86), 68 states have internal predecessors, (86), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-23 15:05:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2022-11-23 15:05:05,928 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 41 [2022-11-23 15:05:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:05,929 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2022-11-23 15:05:05,929 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) [2022-11-23 15:05:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2022-11-23 15:05:05,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 15:05:05,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:05,932 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] [2022-11-23 15:05:05,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:06,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:06,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1878159694, now seen corresponding path program 1 times [2022-11-23 15:05:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:06,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370563837] [2022-11-23 15:05:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:06,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:05:06,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:06,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370563837] [2022-11-23 15:05:06,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370563837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:05:06,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122631390] [2022-11-23 15:05:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:06,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:06,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:06,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:05:06,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:05:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:06,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 15:05:06,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:05:06,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:05:06,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122631390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:06,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:05:06,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-23 15:05:06,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172578052] [2022-11-23 15:05:06,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:06,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:05:06,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:06,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:05:06,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:05:06,688 INFO L87 Difference]: Start difference. First operand 105 states and 137 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) [2022-11-23 15:05:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:06,786 INFO L93 Difference]: Finished difference Result 225 states and 311 transitions. [2022-11-23 15:05:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:05:06,787 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 [2022-11-23 15:05:06,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:06,788 INFO L225 Difference]: With dead ends: 225 [2022-11-23 15:05:06,789 INFO L226 Difference]: Without dead ends: 133 [2022-11-23 15:05:06,789 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 [2022-11-23 15:05:06,790 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:06,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:05:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-23 15:05:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2022-11-23 15:05:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.323943661971831) internal successors, (94), 74 states have internal predecessors, (94), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-23 15:05:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 145 transitions. [2022-11-23 15:05:06,834 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 145 transitions. Word has length 42 [2022-11-23 15:05:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:06,834 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 145 transitions. [2022-11-23 15:05:06,834 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) [2022-11-23 15:05:06,835 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 145 transitions. [2022-11-23 15:05:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 15:05:06,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:06,836 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] [2022-11-23 15:05:06,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:05:07,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:07,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:07,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1695628998, now seen corresponding path program 1 times [2022-11-23 15:05:07,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:07,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210187477] [2022-11-23 15:05:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:07,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:07,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:05:07,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:07,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210187477] [2022-11-23 15:05:07,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210187477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:05:07,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145571231] [2022-11-23 15:05:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:07,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:07,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:07,353 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:05:07,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 15:05:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:07,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 15:05:07,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:07,748 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-23 15:05:07,749 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 [2022-11-23 15:05:07,772 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:05:07,772 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 [2022-11-23 15:05:07,783 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 [2022-11-23 15:05:07,794 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 [2022-11-23 15:05:07,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:05:07,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 13 [2022-11-23 15:05:07,830 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 [2022-11-23 15:05:23,057 WARN L233 SmtUtils]: Spent 13.07s 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) [2022-11-23 15:05:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:05:26,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:05:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:05:31,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145571231] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:05:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849060866] [2022-11-23 15:05:31,120 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-23 15:05:31,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:05:31,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:05:31,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:05:31,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:05:31,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,199 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:05:31,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-23 15:05:31,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,296 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:05:31,297 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 [2022-11-23 15:05:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,638 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 [2022-11-23 15:05:31,673 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 [2022-11-23 15:05:31,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,698 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 [2022-11-23 15:05:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,735 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 [2022-11-23 15:05:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,802 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 [2022-11-23 15:05:31,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,845 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 [2022-11-23 15:05:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,896 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 [2022-11-23 15:05:31,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:31,932 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 [2022-11-23 15:05:32,840 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 130 for LOIs [2022-11-23 15:05:33,607 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-23 15:05:33,706 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:05:33,730 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-23 15:05:33,810 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:05:41,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [849060866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:05:41,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:05:41,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-23 15:05:41,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790227956] [2022-11-23 15:05:41,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:05:41,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:05:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:05:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:05:41,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 15:05:41,655 INFO L87 Difference]: Start difference. First operand 111 states and 145 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) [2022-11-23 15:05:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:05:46,202 INFO L93 Difference]: Finished difference Result 172 states and 221 transitions. [2022-11-23 15:05:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 15:05:46,203 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 [2022-11-23 15:05:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:05:46,205 INFO L225 Difference]: With dead ends: 172 [2022-11-23 15:05:46,205 INFO L226 Difference]: Without dead ends: 121 [2022-11-23 15:05:46,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 15:05:46,207 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:05:46,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 362 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 15:05:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-23 15:05:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-11-23 15:05:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.32) internal successors, (99), 79 states have internal predecessors, (99), 27 states have call successors, (27), 13 states have call predecessors, (27), 15 states have return successors, (27), 25 states have call predecessors, (27), 25 states have call successors, (27) [2022-11-23 15:05:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 153 transitions. [2022-11-23 15:05:46,251 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 153 transitions. Word has length 45 [2022-11-23 15:05:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:05:46,252 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 153 transitions. [2022-11-23 15:05:46,252 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) [2022-11-23 15:05:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 153 transitions. [2022-11-23 15:05:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 15:05:46,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:05:46,253 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] [2022-11-23 15:05:46,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 15:05:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:46,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:05:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:05:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1964135121, now seen corresponding path program 1 times [2022-11-23 15:05:46,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:05:46,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993284028] [2022-11-23 15:05:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:46,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:05:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-23 15:05:46,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:05:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993284028] [2022-11-23 15:05:46,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993284028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:05:46,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443327750] [2022-11-23 15:05:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:05:46,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:05:46,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:05:46,770 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:05:46,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 15:05:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:05:47,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-23 15:05:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:05:47,166 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 [2022-11-23 15:05:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:47,172 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 [2022-11-23 15:05:47,231 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-23 15:05:47,231 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 [2022-11-23 15:05:47,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:47,237 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 [2022-11-23 15:05:47,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:05:47,246 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 15 treesize of output 17 [2022-11-23 15:05:47,255 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 [2022-11-23 15:05:47,365 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))) (let ((.cse0 (select .cse1 24))) (and (not (= .cse0 0)) (= (select .cse1 0) .cse0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select v_DerPreprocessor_21 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|) (<= (+ 2 .cse0) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))))) is different from true [2022-11-23 15:05:59,425 WARN L233 SmtUtils]: Spent 8.71s 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) [2022-11-23 15:06:01,892 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| Int) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|)) (.cse0 (select .cse2 24))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 8) 0) (not (= .cse0 0)) (= (select .cse1 16) 0) (= (select .cse2 8) 0) (= .cse0 (select v_DerPreprocessor_23 24)) (= .cse0 (select .cse2 0)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|) (= (select .cse2 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| Int) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|))) (let ((.cse3 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|)) (.cse4 (select .cse5 24))) (and (= (select .cse3 16) 0) (= .cse4 (select v_DerPreprocessor_25 24)) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_25) .cse4 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_25) .cse4)) (= (select .cse5 16) 0) (= .cse4 (select .cse5 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|) (= (select .cse3 8) 0) (<= (+ 2 .cse4) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|) (= (select .cse5 8) 0) (not (= .cse4 0)))))) (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| Int)) (let ((.cse7 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))) (let ((.cse6 (select .cse7 24))) (and (not (= .cse6 0)) (= (select .cse7 0) .cse6) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse6 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse6 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse6) (select |c_#memory_$Pointer$.base| .cse6)) (= .cse6 (select v_DerPreprocessor_21 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|) (<= (+ 2 .cse6) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|)))))) is different from true [2022-11-23 15:06:02,689 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| Int) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|)) (.cse0 (select .cse2 24))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49| v_DerPreprocessor_23) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 8) 0) (not (= .cse0 0)) (= (select .cse1 16) 0) (= (select .cse2 8) 0) (= .cse0 (select v_DerPreprocessor_23 24)) (= .cse0 (select .cse2 0)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|) (= (select .cse2 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_49|))))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| Int) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|))) (let ((.cse3 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|)) (.cse4 (select .cse5 24))) (and (= (select .cse3 16) 0) (= .cse4 (select v_DerPreprocessor_25 24)) (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_25) .cse4 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3| v_DerPreprocessor_25) .cse4)) (= (select .cse5 16) 0) (= .cse4 (select .cse5 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|) (= (select .cse3 8) 0) (<= (+ 2 .cse4) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_3|) (= (select .cse5 8) 0) (not (= .cse4 0)))))) (exists ((v_DerPreprocessor_26 (Array Int Int)) (v_DerPreprocessor_27 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4| Int)) (let ((.cse6 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4|))) (let ((.cse7 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4|)) (.cse8 (select .cse6 24))) (and (= (select .cse6 8) 0) (= (select .cse7 8) 0) (= (select .cse7 16) 0) (= (select .cse6 16) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse8 v_DerPreprocessor_26) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4| v_DerPreprocessor_27) .cse8 v_DerPreprocessor_26) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4| v_DerPreprocessor_27) .cse8) (select |c_#memory_$Pointer$.base| .cse8)) (= .cse8 (select .cse6 0)) (<= (+ 2 .cse8) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4|) (= (select v_DerPreprocessor_27 24) .cse8) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_4|) (not (= .cse8 0)))))) (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| Int)) (let ((.cse10 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|))) (let ((.cse9 (select .cse10 24))) (and (not (= .cse9 0)) (= (select .cse10 0) .cse9) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse9 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse9 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48| v_DerPreprocessor_21) .cse9) (select |c_#memory_$Pointer$.base| .cse9)) (= .cse9 (select v_DerPreprocessor_21 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|) (<= (+ 2 .cse9) |v_ULTIMATE.start_aws_linked_list_rend_harness_~#list~0#1.base_BEFORE_CALL_48|)))))) is different from true [2022-11-23 15:06:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-11-23 15:06:06,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:06:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:06:10,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443327750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:06:10,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338010962] [2022-11-23 15:06:10,841 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-23 15:06:10,841 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:06:10,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:06:10,842 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:06:10,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:06:10,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:10,908 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:06:10,908 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 [2022-11-23 15:06:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:10,930 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 [2022-11-23 15:06:11,175 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 [2022-11-23 15:06:11,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,194 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 [2022-11-23 15:06:11,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,218 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 [2022-11-23 15:06:11,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,251 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 [2022-11-23 15:06:11,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:06:11,330 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:06:11,331 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 [2022-11-23 15:06:11,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,366 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 [2022-11-23 15:06:11,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,462 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-23 15:06:11,462 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 [2022-11-23 15:06:11,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:06:11,502 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 [2022-11-23 15:06:11,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,538 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 [2022-11-23 15:06:11,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,560 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 [2022-11-23 15:06:11,625 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 [2022-11-23 15:06:11,644 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 [2022-11-23 15:06:11,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:06:11,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,670 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 [2022-11-23 15:06:11,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,693 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 [2022-11-23 15:06:11,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,717 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 [2022-11-23 15:06:11,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,740 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 [2022-11-23 15:06:11,796 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 [2022-11-23 15:06:11,819 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 [2022-11-23 15:06:11,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,842 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 [2022-11-23 15:06:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,873 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 [2022-11-23 15:06:11,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,908 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 [2022-11-23 15:06:11,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:06:11,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,928 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 [2022-11-23 15:06:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,969 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 [2022-11-23 15:06:11,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:11,982 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 [2022-11-23 15:06:12,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:12,004 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 [2022-11-23 15:06:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:12,042 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 [2022-11-23 15:06:13,098 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-23 15:06:13,596 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-23 15:06:13,667 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:06:13,690 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-23 15:06:13,785 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:06:21,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1338010962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:21,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:06:21,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 52 [2022-11-23 15:06:21,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178099919] [2022-11-23 15:06:21,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:21,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:06:21,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:21,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:06:21,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2109, Unknown=74, NotChecked=288, Total=2652 [2022-11-23 15:06:21,395 INFO L87 Difference]: Start difference. First operand 118 states and 153 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) [2022-11-23 15:06:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:25,783 INFO L93 Difference]: Finished difference Result 178 states and 229 transitions. [2022-11-23 15:06:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:06:25,784 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 [2022-11-23 15:06:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:25,785 INFO L225 Difference]: With dead ends: 178 [2022-11-23 15:06:25,785 INFO L226 Difference]: Without dead ends: 125 [2022-11-23 15:06:25,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=233, Invalid=2668, Unknown=81, NotChecked=324, Total=3306 [2022-11-23 15:06:25,787 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 34 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:25,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 206 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 15:06:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-23 15:06:25,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-23 15:06:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 82 states have internal predecessors, (103), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-23 15:06:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 159 transitions. [2022-11-23 15:06:25,843 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 159 transitions. Word has length 46 [2022-11-23 15:06:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:25,843 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 159 transitions. [2022-11-23 15:06:25,844 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) [2022-11-23 15:06:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 159 transitions. [2022-11-23 15:06:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 15:06:25,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:25,845 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] [2022-11-23 15:06:25,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:26,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 15:06:26,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash -850872160, now seen corresponding path program 1 times [2022-11-23 15:06:26,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:26,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520320838] [2022-11-23 15:06:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:26,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:06:26,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:26,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520320838] [2022-11-23 15:06:26,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520320838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:06:26,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24899371] [2022-11-23 15:06:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:26,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:26,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:26,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:26,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 15:06:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:27,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 15:06:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:29,987 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 15:06:29,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:06:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:06:30,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24899371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:06:30,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975671743] [2022-11-23 15:06:30,401 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-23 15:06:30,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:06:30,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:06:30,402 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:06:30,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:06:30,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,476 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:06:30,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-23 15:06:30,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,554 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:06:30,554 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 [2022-11-23 15:06:30,809 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 [2022-11-23 15:06:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,833 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 [2022-11-23 15:06:30,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,864 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 [2022-11-23 15:06:30,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,891 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 [2022-11-23 15:06:30,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,952 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 [2022-11-23 15:06:30,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:30,986 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 [2022-11-23 15:06:31,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,019 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 [2022-11-23 15:06:31,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:31,059 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 [2022-11-23 15:06:31,936 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 128 for LOIs [2022-11-23 15:06:33,019 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 173 for LOIs [2022-11-23 15:06:33,087 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:06:33,103 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 15:06:33,162 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:06:41,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1975671743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:06:41,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:06:41,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-23 15:06:41,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344318173] [2022-11-23 15:06:41,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:06:41,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 15:06:41,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:06:41,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 15:06:41,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 15:06:41,194 INFO L87 Difference]: Start difference. First operand 123 states and 159 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) [2022-11-23 15:06:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:06:47,158 INFO L93 Difference]: Finished difference Result 191 states and 243 transitions. [2022-11-23 15:06:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 15:06:47,159 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 [2022-11-23 15:06:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:06:47,160 INFO L225 Difference]: With dead ends: 191 [2022-11-23 15:06:47,160 INFO L226 Difference]: Without dead ends: 133 [2022-11-23 15:06:47,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 15:06:47,162 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 130 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:06:47,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 204 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 15:06:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-23 15:06:47,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2022-11-23 15:06:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 83 states have internal predecessors, (104), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-23 15:06:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2022-11-23 15:06:47,227 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 47 [2022-11-23 15:06:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:06:47,227 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2022-11-23 15:06:47,228 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) [2022-11-23 15:06:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2022-11-23 15:06:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 15:06:47,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:06:47,229 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] [2022-11-23 15:06:47,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:06:47,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 15:06:47,436 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:06:47,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:06:47,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1509868147, now seen corresponding path program 1 times [2022-11-23 15:06:47,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:06:47,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097164474] [2022-11-23 15:06:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:47,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:06:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:06:47,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:06:47,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097164474] [2022-11-23 15:06:47,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097164474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:06:47,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213880488] [2022-11-23 15:06:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:06:47,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:06:47,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:06:47,661 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:06:47,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 15:06:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:06:47,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-23 15:06:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:06:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:06:53,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:06:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 15:06:58,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213880488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:06:58,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018544891] [2022-11-23 15:06:58,093 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-23 15:06:58,094 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:06:58,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:06:58,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:06:58,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:06:58,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,189 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:06:58,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-23 15:06:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,259 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:06:58,260 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 [2022-11-23 15:06:58,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,506 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 [2022-11-23 15:06:58,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,532 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 [2022-11-23 15:06:58,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,562 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 [2022-11-23 15:06:58,588 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 [2022-11-23 15:06:58,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,640 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 [2022-11-23 15:06:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,671 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 [2022-11-23 15:06:58,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,709 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 [2022-11-23 15:06:58,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:06:58,736 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 [2022-11-23 15:07:00,258 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-11-23 15:07:00,335 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-23 15:07:01,027 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-23 15:07:01,029 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:07:01,044 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 15:07:01,115 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:15,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5587#(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$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24))) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 4)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 1) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 2)) (not (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| 3)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24) 0) (= |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 24)) |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~rval~3#1.base_BEFORE_CALL_3|) 16) 0))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:07:15,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:15,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:07:15,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 11] total 26 [2022-11-23 15:07:15,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98406733] [2022-11-23 15:07:15,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:15,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 15:07:15,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 15:07:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 15:07:15,174 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-23 15:07:17,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:07:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:22,303 INFO L93 Difference]: Finished difference Result 460 states and 620 transitions. [2022-11-23 15:07:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 15:07:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 48 [2022-11-23 15:07:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:22,308 INFO L225 Difference]: With dead ends: 460 [2022-11-23 15:07:22,308 INFO L226 Difference]: Without dead ends: 353 [2022-11-23 15:07:22,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 94 SyntacticMatches, 10 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2022-11-23 15:07:22,312 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 224 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 187 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:22,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 348 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 950 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 15:07:22,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-23 15:07:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 186. [2022-11-23 15:07:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 121 states have (on average 1.2396694214876034) internal successors, (150), 128 states have internal predecessors, (150), 40 states have call successors, (40), 20 states have call predecessors, (40), 24 states have return successors, (43), 37 states have call predecessors, (43), 37 states have call successors, (43) [2022-11-23 15:07:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 233 transitions. [2022-11-23 15:07:22,457 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 233 transitions. Word has length 48 [2022-11-23 15:07:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:22,458 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 233 transitions. [2022-11-23 15:07:22,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 10 states have call successors, (22), 4 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-23 15:07:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 233 transitions. [2022-11-23 15:07:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 15:07:22,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:22,460 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:07:22,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:22,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:22,669 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:22,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:22,669 INFO L85 PathProgramCache]: Analyzing trace with hash 557997523, now seen corresponding path program 1 times [2022-11-23 15:07:22,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:22,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187784640] [2022-11-23 15:07:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:22,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:07:22,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:22,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187784640] [2022-11-23 15:07:22,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187784640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:07:22,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148350028] [2022-11-23 15:07:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:22,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:22,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:22,946 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:22,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 15:07:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 15:07:23,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 15:07:23,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 15:07:23,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148350028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:23,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086392983] [2022-11-23 15:07:23,590 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-23 15:07:23,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:23,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:23,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:23,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:23,680 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:07:23,680 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 [2022-11-23 15:07:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:23,703 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 [2022-11-23 15:07:23,966 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 [2022-11-23 15:07:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:23,986 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 [2022-11-23 15:07:24,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,015 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 [2022-11-23 15:07:24,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,043 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 [2022-11-23 15:07:24,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,106 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 [2022-11-23 15:07:24,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,137 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 [2022-11-23 15:07:24,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,166 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 [2022-11-23 15:07:24,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:24,205 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 [2022-11-23 15:07:34,391 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-23 15:07:34,673 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-23 15:07:35,418 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-23 15:07:35,420 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:07:35,435 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 15:07:35,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:07:54,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6985#(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) (= 31 (select |#length| 2)) (= |#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) (= (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|)) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31| Int)) (and (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24)) 0) 16) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24) 0) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 16) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 1) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24)) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 16) 0) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_31|) 8) 0))) (= (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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:07:54,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:07:54,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:07:54,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 6] total 14 [2022-11-23 15:07:54,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722247011] [2022-11-23 15:07:54,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:07:54,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:07:54,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:07:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:07:54,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 15:07:54,883 INFO L87 Difference]: Start difference. First operand 186 states and 233 transitions. Second operand has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-23 15:07:55,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:07:55,438 INFO L93 Difference]: Finished difference Result 392 states and 488 transitions. [2022-11-23 15:07:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:07:55,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 64 [2022-11-23 15:07:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:07:55,441 INFO L225 Difference]: With dead ends: 392 [2022-11-23 15:07:55,441 INFO L226 Difference]: Without dead ends: 234 [2022-11-23 15:07:55,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 152 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 15:07:55,443 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:07:55,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 524 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:07:55,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-23 15:07:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 195. [2022-11-23 15:07:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 127 states have (on average 1.2283464566929134) internal successors, (156), 137 states have internal predecessors, (156), 40 states have call successors, (40), 20 states have call predecessors, (40), 27 states have return successors, (46), 37 states have call predecessors, (46), 37 states have call successors, (46) [2022-11-23 15:07:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 242 transitions. [2022-11-23 15:07:55,575 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 242 transitions. Word has length 64 [2022-11-23 15:07:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:07:55,575 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 242 transitions. [2022-11-23 15:07:55,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (13), 2 states have call predecessors, (13), 7 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-23 15:07:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 242 transitions. [2022-11-23 15:07:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-23 15:07:55,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:07:55,577 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2022-11-23 15:07:55,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 15:07:55,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 15:07:55,783 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:07:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:07:55,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1356635027, now seen corresponding path program 1 times [2022-11-23 15:07:55,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:07:55,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62628774] [2022-11-23 15:07:55,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:55,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:07:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 15:07:56,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:07:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62628774] [2022-11-23 15:07:56,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62628774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:07:56,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722180116] [2022-11-23 15:07:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:07:56,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:07:56,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:07:56,630 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:07:56,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 15:07:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:07:56,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 15:07:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:07:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:07:57,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:07:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-23 15:07:57,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722180116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:07:57,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901389123] [2022-11-23 15:07:57,580 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-23 15:07:57,580 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:07:57,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:07:57,581 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:07:57,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:07:57,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:57,691 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:07:57,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-23 15:07:57,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:57,776 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:07:57,777 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 [2022-11-23 15:07:58,047 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 [2022-11-23 15:07:58,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,072 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 [2022-11-23 15:07:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,102 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 [2022-11-23 15:07:58,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,128 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 [2022-11-23 15:07:58,188 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 [2022-11-23 15:07:58,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,214 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 [2022-11-23 15:07:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,254 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 [2022-11-23 15:07:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:07:58,288 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 [2022-11-23 15:07:59,852 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-23 15:07:59,967 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 17 for LOIs [2022-11-23 15:08:00,609 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-23 15:08:00,611 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:08:00,631 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 15:08:00,692 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:08:14,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8291#(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))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 24) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 16) 0) (not (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0) 16) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 8) 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 1) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) (not (= 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_64|) 0)) 16) 0))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 31 (select |#length| 2)) (= |#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) (= (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 [2022-11-23 15:08:14,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:08:14,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:08:14,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-11-23 15:08:14,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712960859] [2022-11-23 15:08:14,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:08:14,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 15:08:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:08:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 15:08:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2517, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 15:08:14,394 INFO L87 Difference]: Start difference. First operand 195 states and 242 transitions. Second operand has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-23 15:08:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:08:16,806 INFO L93 Difference]: Finished difference Result 496 states and 624 transitions. [2022-11-23 15:08:16,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 15:08:16,807 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) Word has length 66 [2022-11-23 15:08:16,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:08:16,811 INFO L225 Difference]: With dead ends: 496 [2022-11-23 15:08:16,811 INFO L226 Difference]: Without dead ends: 318 [2022-11-23 15:08:16,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=523, Invalid=5483, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 15:08:16,814 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 155 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:08:16,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 537 Invalid, 1392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 15:08:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-23 15:08:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 203. [2022-11-23 15:08:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 134 states have (on average 1.2313432835820894) internal successors, (165), 143 states have internal predecessors, (165), 41 states have call successors, (41), 20 states have call predecessors, (41), 27 states have return successors, (47), 39 states have call predecessors, (47), 38 states have call successors, (47) [2022-11-23 15:08:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 253 transitions. [2022-11-23 15:08:16,981 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 253 transitions. Word has length 66 [2022-11-23 15:08:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:08:16,981 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 253 transitions. [2022-11-23 15:08:16,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-23 15:08:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 253 transitions. [2022-11-23 15:08:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 15:08:16,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:08:16,983 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] [2022-11-23 15:08:16,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 15:08:17,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 15:08:17,191 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:08:17,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:08:17,191 INFO L85 PathProgramCache]: Analyzing trace with hash -277742896, now seen corresponding path program 2 times [2022-11-23 15:08:17,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:08:17,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005160832] [2022-11-23 15:08:17,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:08:17,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:08:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:08:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 15:08:19,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:08:19,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005160832] [2022-11-23 15:08:19,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005160832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:08:19,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278465057] [2022-11-23 15:08:19,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:08:19,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:08:19,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:08:19,883 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:08:19,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 15:08:20,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:08:20,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:08:20,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-23 15:08:20,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:08:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 15:08:22,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:08:29,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:08:29,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 15:08:29,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2022-11-23 15:08:29,965 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-23 15:08:29,965 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 36 [2022-11-23 15:08:31,342 INFO L321 Elim1Store]: treesize reduction 13, result has 85.1 percent of original size [2022-11-23 15:08:31,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 120 [2022-11-23 15:08:31,538 INFO L321 Elim1Store]: treesize reduction 4, result has 94.5 percent of original size [2022-11-23 15:08:31,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 146 [2022-11-23 15:08:34,682 INFO L321 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2022-11-23 15:08:34,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 1 [2022-11-23 15:08:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 15:08:35,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278465057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:08:35,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627777719] [2022-11-23 15:08:35,108 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-23 15:08:35,109 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:08:35,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:08:35,109 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:08:35,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:08:35,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,204 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:08:35,204 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 [2022-11-23 15:08:35,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,226 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 [2022-11-23 15:08:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,521 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 [2022-11-23 15:08:35,546 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 [2022-11-23 15:08:35,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,570 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 [2022-11-23 15:08:35,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,604 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 [2022-11-23 15:08:35,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,674 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 [2022-11-23 15:08:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,701 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 [2022-11-23 15:08:35,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,732 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 [2022-11-23 15:08:35,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:08:35,768 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 [2022-11-23 15:08:45,928 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-23 15:08:46,157 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-23 15:08:46,870 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-23 15:08:46,911 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:08:46,931 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 15:08:46,991 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:09:10,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9827#(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) (= 31 (select |#length| 2)) (= |#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) (exists ((|v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 1) (<= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (= 16 (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24)) 0)) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 16) 0) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_rend_~list#1.base_BEFORE_CALL_57|))) (= (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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:09:10,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:09:10,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:09:10,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 22] total 52 [2022-11-23 15:09:10,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683038439] [2022-11-23 15:09:10,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:09:10,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-23 15:09:10,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:10,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-23 15:09:10,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=5888, Unknown=0, NotChecked=0, Total=6320 [2022-11-23 15:09:10,801 INFO L87 Difference]: Start difference. First operand 203 states and 253 transitions. Second operand has 52 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 44 states have internal predecessors, (95), 19 states have call successors, (30), 4 states have call predecessors, (30), 13 states have return successors, (28), 16 states have call predecessors, (28), 17 states have call successors, (28) [2022-11-23 15:09:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:30,024 INFO L93 Difference]: Finished difference Result 626 states and 819 transitions. [2022-11-23 15:09:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-23 15:09:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 44 states have internal predecessors, (95), 19 states have call successors, (30), 4 states have call predecessors, (30), 13 states have return successors, (28), 16 states have call predecessors, (28), 17 states have call successors, (28) Word has length 67 [2022-11-23 15:09:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:30,029 INFO L225 Difference]: With dead ends: 626 [2022-11-23 15:09:30,029 INFO L226 Difference]: Without dead ends: 462 [2022-11-23 15:09:30,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5792 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=1965, Invalid=18915, Unknown=0, NotChecked=0, Total=20880 [2022-11-23 15:09:30,036 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 647 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 3476 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 4285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 3476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:30,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 882 Invalid, 4285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 3476 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 15:09:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-23 15:09:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 336. [2022-11-23 15:09:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 230 states have (on average 1.208695652173913) internal successors, (278), 243 states have internal predecessors, (278), 64 states have call successors, (64), 30 states have call predecessors, (64), 41 states have return successors, (79), 62 states have call predecessors, (79), 60 states have call successors, (79) [2022-11-23 15:09:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 421 transitions. [2022-11-23 15:09:30,306 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 421 transitions. Word has length 67 [2022-11-23 15:09:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:30,307 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 421 transitions. [2022-11-23 15:09:30,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 44 states have internal predecessors, (95), 19 states have call successors, (30), 4 states have call predecessors, (30), 13 states have return successors, (28), 16 states have call predecessors, (28), 17 states have call successors, (28) [2022-11-23 15:09:30,308 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 421 transitions. [2022-11-23 15:09:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 15:09:30,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:30,309 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] [2022-11-23 15:09:30,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:09:30,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 15:09:30,517 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:30,517 INFO L85 PathProgramCache]: Analyzing trace with hash -573706957, now seen corresponding path program 1 times [2022-11-23 15:09:30,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:30,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140150120] [2022-11-23 15:09:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:30,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-23 15:09:30,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:30,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140150120] [2022-11-23 15:09:30,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140150120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:09:30,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:09:30,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 15:09:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376646175] [2022-11-23 15:09:30,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:09:30,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:09:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:09:30,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:09:30,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:09:30,817 INFO L87 Difference]: Start difference. First operand 336 states and 421 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-11-23 15:09:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:09:31,345 INFO L93 Difference]: Finished difference Result 389 states and 479 transitions. [2022-11-23 15:09:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:09:31,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 70 [2022-11-23 15:09:31,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:09:31,349 INFO L225 Difference]: With dead ends: 389 [2022-11-23 15:09:31,349 INFO L226 Difference]: Without dead ends: 387 [2022-11-23 15:09:31,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:09:31,352 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:09:31,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 283 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:09:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-23 15:09:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 363. [2022-11-23 15:09:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 248 states have (on average 1.1935483870967742) internal successors, (296), 264 states have internal predecessors, (296), 67 states have call successors, (67), 33 states have call predecessors, (67), 47 states have return successors, (85), 65 states have call predecessors, (85), 63 states have call successors, (85) [2022-11-23 15:09:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 448 transitions. [2022-11-23 15:09:31,663 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 448 transitions. Word has length 70 [2022-11-23 15:09:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:09:31,665 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 448 transitions. [2022-11-23 15:09:31,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-11-23 15:09:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 448 transitions. [2022-11-23 15:09:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 15:09:31,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:09:31,670 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 3, 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] [2022-11-23 15:09:31,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:09:31,671 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:09:31,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:09:31,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1081195759, now seen corresponding path program 3 times [2022-11-23 15:09:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:09:31,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504198177] [2022-11-23 15:09:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:09:31,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:09:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:09:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 15:09:33,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:09:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504198177] [2022-11-23 15:09:33,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504198177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:09:33,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337980723] [2022-11-23 15:09:33,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:09:33,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:09:33,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:09:33,700 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:09:33,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 15:09:34,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:09:34,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:09:34,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-23 15:09:34,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:09:34,182 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:09:34,183 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 [2022-11-23 15:09:34,203 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:09:34,203 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 [2022-11-23 15:09:59,583 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:09:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 15:09:59,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:10:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-23 15:10:00,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337980723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:10:00,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [66970840] [2022-11-23 15:10:00,913 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-23 15:10:00,913 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:10:00,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:10:00,913 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:10:00,914 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:10:00,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:00,977 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:10:00,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-23 15:10:00,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,050 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:10:01,051 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 [2022-11-23 15:10:01,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,269 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 [2022-11-23 15:10:01,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,312 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 [2022-11-23 15:10:01,335 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 [2022-11-23 15:10:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,362 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 [2022-11-23 15:10:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,428 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 [2022-11-23 15:10:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,465 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 [2022-11-23 15:10:01,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,493 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 [2022-11-23 15:10:01,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:10:01,519 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 [2022-11-23 15:10:11,923 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 145 for LOIs [2022-11-23 15:10:12,149 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-23 15:10:12,893 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-23 15:10:12,937 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:10:12,953 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 15:10:13,012 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:10:35,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12960#(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) (= 31 (select |#length| 2)) (= |#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) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 0)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 1) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 2)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 4)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 3)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 32))) (= |__VERIFIER_assert_#in~cond| 0) (= (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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:10:35,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:10:35,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:10:35,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 39 [2022-11-23 15:10:35,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4592195] [2022-11-23 15:10:35,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:10:35,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 15:10:35,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:10:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 15:10:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=3991, Unknown=7, NotChecked=0, Total=4422 [2022-11-23 15:10:35,355 INFO L87 Difference]: Start difference. First operand 363 states and 448 transitions. Second operand has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-23 15:10:55,664 WARN L233 SmtUtils]: Spent 20.07s on a formula simplification. DAG size of input: 45 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:05,826 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:15,962 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:26,089 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:46,240 WARN L233 SmtUtils]: Spent 20.09s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:56,595 WARN L233 SmtUtils]: Spent 10.04s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:11:59,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:03,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:05,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:25,733 WARN L233 SmtUtils]: Spent 20.09s on a formula simplification. DAG size of input: 54 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:12:27,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:29,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:33,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:40,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:48,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:12:58,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:10,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:12,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:14,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:16,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:18,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:20,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:32,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:34,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:36,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:38,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:40,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:42,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:44,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:47,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:49,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:51,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:53,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:57,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:13:59,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:01,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:03,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:05,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:07,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:10,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:12,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:14,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:16,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:18,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:20,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:22,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:24,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:26,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:28,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:30,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:32,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:34,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:36,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 15:14:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:36,728 INFO L93 Difference]: Finished difference Result 571 states and 685 transitions. [2022-11-23 15:14:36,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 15:14:36,729 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) Word has length 73 [2022-11-23 15:14:36,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:36,731 INFO L225 Difference]: With dead ends: 571 [2022-11-23 15:14:36,732 INFO L226 Difference]: Without dead ends: 336 [2022-11-23 15:14:36,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 168 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 194.2s TimeCoverageRelationStatistics Valid=934, Invalid=7779, Unknown=29, NotChecked=0, Total=8742 [2022-11-23 15:14:36,735 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 471 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 212 mSolverCounterUnsat, 46 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 46 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:36,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 935 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1805 Invalid, 46 Unknown, 0 Unchecked, 95.0s Time] [2022-11-23 15:14:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-23 15:14:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 228. [2022-11-23 15:14:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 155 states have (on average 1.135483870967742) internal successors, (176), 162 states have internal predecessors, (176), 41 states have call successors, (41), 26 states have call predecessors, (41), 31 states have return successors, (46), 39 states have call predecessors, (46), 38 states have call successors, (46) [2022-11-23 15:14:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 263 transitions. [2022-11-23 15:14:36,883 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 263 transitions. Word has length 73 [2022-11-23 15:14:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:36,884 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 263 transitions. [2022-11-23 15:14:36,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 37 states have internal predecessors, (105), 20 states have call successors, (33), 4 states have call predecessors, (33), 8 states have return successors, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2022-11-23 15:14:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 263 transitions. [2022-11-23 15:14:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-23 15:14:36,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:36,886 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:14:36,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:14:37,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 15:14:37,089 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash -79775404, now seen corresponding path program 1 times [2022-11-23 15:14:37,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569855157] [2022-11-23 15:14:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:37,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-23 15:14:37,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569855157] [2022-11-23 15:14:37,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569855157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:14:37,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:14:37,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:14:37,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536820562] [2022-11-23 15:14:37,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:14:37,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:14:37,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:14:37,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:14:37,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:14:37,433 INFO L87 Difference]: Start difference. First operand 228 states and 263 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 15:14:37,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:14:37,700 INFO L93 Difference]: Finished difference Result 242 states and 276 transitions. [2022-11-23 15:14:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:14:37,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2022-11-23 15:14:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:14:37,702 INFO L225 Difference]: With dead ends: 242 [2022-11-23 15:14:37,703 INFO L226 Difference]: Without dead ends: 240 [2022-11-23 15:14:37,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:14:37,707 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:14:37,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 157 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:14:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-23 15:14:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-11-23 15:14:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 164 states have (on average 1.1280487804878048) internal successors, (185), 171 states have internal predecessors, (185), 41 states have call successors, (41), 29 states have call predecessors, (41), 34 states have return successors, (46), 39 states have call predecessors, (46), 38 states have call successors, (46) [2022-11-23 15:14:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 272 transitions. [2022-11-23 15:14:37,892 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 272 transitions. Word has length 76 [2022-11-23 15:14:37,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:14:37,893 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 272 transitions. [2022-11-23 15:14:37,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 15:14:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 272 transitions. [2022-11-23 15:14:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 15:14:37,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:14:37,895 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 3, 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] [2022-11-23 15:14:37,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 15:14:37,895 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:14:37,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:14:37,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1977405740, now seen corresponding path program 1 times [2022-11-23 15:14:37,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:14:37,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762847547] [2022-11-23 15:14:37,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:37,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:14:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-23 15:14:38,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:14:38,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762847547] [2022-11-23 15:14:38,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762847547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:14:38,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417407074] [2022-11-23 15:14:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:14:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:14:38,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:14:38,907 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:14:38,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:14:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:14:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-23 15:14:39,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:00,346 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:15:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 74 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 15:15:00,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:15:01,246 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-23 15:15:01,246 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 [2022-11-23 15:15:01,257 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-23 15:15:01,257 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 [2022-11-23 15:15:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 15:15:01,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417407074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:15:01,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290785651] [2022-11-23 15:15:01,290 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-23 15:15:01,291 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:15:01,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:15:01,291 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:15:01,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:15:01,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,361 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-23 15:15:01,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-23 15:15:01,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,425 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:15:01,426 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 [2022-11-23 15:15:01,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,629 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 [2022-11-23 15:15:01,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,659 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 [2022-11-23 15:15:01,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,683 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 [2022-11-23 15:15:01,711 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 [2022-11-23 15:15:01,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:01,780 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-23 15:15:01,780 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 [2022-11-23 15:15:01,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,816 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 [2022-11-23 15:15:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,930 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-23 15:15:01,930 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 [2022-11-23 15:15:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,960 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 [2022-11-23 15:15:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:01,999 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 [2022-11-23 15:15:02,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:02,036 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 [2022-11-23 15:15:02,100 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 [2022-11-23 15:15:02,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,125 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 [2022-11-23 15:15:02,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:02,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,149 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 [2022-11-23 15:15:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,177 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 [2022-11-23 15:15:02,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,199 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 [2022-11-23 15:15:02,221 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 [2022-11-23 15:15:02,263 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 [2022-11-23 15:15:02,274 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 [2022-11-23 15:15:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,297 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 [2022-11-23 15:15:02,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:15:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,319 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 [2022-11-23 15:15:02,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,342 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 [2022-11-23 15:15:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,368 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 [2022-11-23 15:15:02,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,416 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 [2022-11-23 15:15:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,430 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 [2022-11-23 15:15:02,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,444 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 [2022-11-23 15:15:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:15:02,472 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 [2022-11-23 15:15:04,877 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-23 15:15:04,898 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-23 15:15:05,606 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-23 15:15:05,608 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:15:05,625 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 15:15:05,682 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:15:14,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15402#(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) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_183| 16)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_185|))) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:15:14,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:15:14,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 15:15:14,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 14] total 31 [2022-11-23 15:15:14,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192847633] [2022-11-23 15:15:14,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 15:15:14,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 15:15:14,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 15:15:14,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3054, Unknown=7, NotChecked=0, Total=3306 [2022-11-23 15:15:14,753 INFO L87 Difference]: Start difference. First operand 240 states and 272 transitions. Second operand has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 14 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 12 states have call predecessors, (27), 14 states have call successors, (27) [2022-11-23 15:15:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:16,768 INFO L93 Difference]: Finished difference Result 433 states and 499 transitions. [2022-11-23 15:15:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 15:15:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 14 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 12 states have call predecessors, (27), 14 states have call successors, (27) Word has length 79 [2022-11-23 15:15:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:16,771 INFO L225 Difference]: With dead ends: 433 [2022-11-23 15:15:16,771 INFO L226 Difference]: Without dead ends: 269 [2022-11-23 15:15:16,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 180 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=364, Invalid=4051, Unknown=7, NotChecked=0, Total=4422 [2022-11-23 15:15:16,773 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 223 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:16,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 681 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 15:15:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-23 15:15:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 240. [2022-11-23 15:15:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 164 states have (on average 1.1219512195121952) internal successors, (184), 171 states have internal predecessors, (184), 41 states have call successors, (41), 29 states have call predecessors, (41), 34 states have return successors, (46), 39 states have call predecessors, (46), 38 states have call successors, (46) [2022-11-23 15:15:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 271 transitions. [2022-11-23 15:15:16,967 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 271 transitions. Word has length 79 [2022-11-23 15:15:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:16,967 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 271 transitions. [2022-11-23 15:15:16,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 14 states have call successors, (28), 4 states have call predecessors, (28), 8 states have return successors, (27), 12 states have call predecessors, (27), 14 states have call successors, (27) [2022-11-23 15:15:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 271 transitions. [2022-11-23 15:15:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 15:15:16,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:16,969 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-23 15:15:16,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:17,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 15:15:17,184 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1751529687, now seen corresponding path program 1 times [2022-11-23 15:15:17,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:17,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616756406] [2022-11-23 15:15:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:17,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-23 15:15:17,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:17,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616756406] [2022-11-23 15:15:17,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616756406] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:17,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:15:17,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 15:15:17,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464022496] [2022-11-23 15:15:17,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:17,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:15:17,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:17,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:15:17,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:15:17,734 INFO L87 Difference]: Start difference. First operand 240 states and 271 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:15:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:18,157 INFO L93 Difference]: Finished difference Result 254 states and 284 transitions. [2022-11-23 15:15:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:15:18,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 82 [2022-11-23 15:15:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:18,159 INFO L225 Difference]: With dead ends: 254 [2022-11-23 15:15:18,159 INFO L226 Difference]: Without dead ends: 248 [2022-11-23 15:15:18,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:15:18,161 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:18,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 202 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:15:18,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-23 15:15:18,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2022-11-23 15:15:18,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 165 states have (on average 1.103030303030303) internal successors, (182), 170 states have internal predecessors, (182), 40 states have call successors, (40), 31 states have call predecessors, (40), 34 states have return successors, (45), 38 states have call predecessors, (45), 38 states have call successors, (45) [2022-11-23 15:15:18,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2022-11-23 15:15:18,366 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 82 [2022-11-23 15:15:18,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:18,366 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2022-11-23 15:15:18,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-23 15:15:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2022-11-23 15:15:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-23 15:15:18,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:18,369 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 4, 3, 3, 3, 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] [2022-11-23 15:15:18,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 15:15:18,370 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:18,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1211099987, now seen corresponding path program 1 times [2022-11-23 15:15:18,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:18,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622593508] [2022-11-23 15:15:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:18,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-23 15:15:18,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622593508] [2022-11-23 15:15:18,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622593508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:18,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4229247] [2022-11-23 15:15:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:18,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:18,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:18,714 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:18,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 15:15:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:19,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 15:15:19,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 15:15:19,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:15:19,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4229247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:19,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:15:19,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-23 15:15:19,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180801634] [2022-11-23 15:15:19,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:19,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:15:19,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:15:19,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:15:19,257 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:15:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:19,634 INFO L93 Difference]: Finished difference Result 405 states and 454 transitions. [2022-11-23 15:15:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:15:19,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2022-11-23 15:15:19,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:19,636 INFO L225 Difference]: With dead ends: 405 [2022-11-23 15:15:19,636 INFO L226 Difference]: Without dead ends: 249 [2022-11-23 15:15:19,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:15:19,638 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:19,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 204 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:15:19,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-23 15:15:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 240. [2022-11-23 15:15:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 165 states have (on average 1.103030303030303) internal successors, (182), 170 states have internal predecessors, (182), 40 states have call successors, (40), 31 states have call predecessors, (40), 34 states have return successors, (45), 38 states have call predecessors, (45), 38 states have call successors, (45) [2022-11-23 15:15:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2022-11-23 15:15:19,847 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 83 [2022-11-23 15:15:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:19,847 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2022-11-23 15:15:19,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 9.0) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 15:15:19,848 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2022-11-23 15:15:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-23 15:15:19,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:19,852 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 3, 3, 3, 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] [2022-11-23 15:15:19,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:20,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 15:15:20,061 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:20,061 INFO L85 PathProgramCache]: Analyzing trace with hash -171176915, now seen corresponding path program 2 times [2022-11-23 15:15:20,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:20,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785619908] [2022-11-23 15:15:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:20,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 80 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 15:15:21,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:21,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785619908] [2022-11-23 15:15:21,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785619908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:21,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276160601] [2022-11-23 15:15:21,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:15:21,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:21,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:21,401 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:21,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 15:15:21,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 15:15:21,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:15:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 15:15:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-23 15:15:22,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:15:22,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276160601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:15:22,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:15:22,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 21 [2022-11-23 15:15:22,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655697214] [2022-11-23 15:15:22,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:15:22,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:15:22,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:15:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:15:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:15:22,009 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-23 15:15:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:15:22,372 INFO L93 Difference]: Finished difference Result 404 states and 453 transitions. [2022-11-23 15:15:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:15:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 85 [2022-11-23 15:15:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:15:22,375 INFO L225 Difference]: With dead ends: 404 [2022-11-23 15:15:22,375 INFO L226 Difference]: Without dead ends: 248 [2022-11-23 15:15:22,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2022-11-23 15:15:22,377 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:15:22,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 239 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:15:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-23 15:15:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 241. [2022-11-23 15:15:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 166 states have (on average 1.1024096385542168) internal successors, (183), 171 states have internal predecessors, (183), 40 states have call successors, (40), 31 states have call predecessors, (40), 34 states have return successors, (45), 38 states have call predecessors, (45), 38 states have call successors, (45) [2022-11-23 15:15:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 268 transitions. [2022-11-23 15:15:22,546 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 268 transitions. Word has length 85 [2022-11-23 15:15:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:15:22,546 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 268 transitions. [2022-11-23 15:15:22,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.4) internal successors, (37), 6 states have internal predecessors, (37), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-23 15:15:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 268 transitions. [2022-11-23 15:15:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 15:15:22,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:15:22,548 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 6, 6, 6, 5, 3, 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] [2022-11-23 15:15:22,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 15:15:22,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:22,755 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:15:22,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:15:22,755 INFO L85 PathProgramCache]: Analyzing trace with hash -400229854, now seen corresponding path program 2 times [2022-11-23 15:15:22,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:15:22,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953212768] [2022-11-23 15:15:22,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:15:22,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:15:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:15:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 30 proven. 68 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-23 15:15:28,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:15:28,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953212768] [2022-11-23 15:15:28,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953212768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:15:28,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436487796] [2022-11-23 15:15:28,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:15:28,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:15:28,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:15:28,139 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:15:28,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a810532f-0e41-4cad-b481-c6819fb8d94c/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 15:15:28,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 15:15:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:15:28,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 146 conjunts are in the unsatisfiable core [2022-11-23 15:15:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:15:28,739 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 7 treesize of output 3 [2022-11-23 15:15:28,766 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-23 15:15:28,766 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 21 treesize of output 25 [2022-11-23 15:15:29,046 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-23 15:15:29,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-23 15:15:29,088 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-23 15:15:29,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-23 15:15:29,099 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 10 treesize of output 9 [2022-11-23 15:15:29,114 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 [2022-11-23 15:15:29,129 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 [2022-11-23 15:15:29,143 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 [2022-11-23 15:15:29,280 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 76 treesize of output 19 [2022-11-23 15:15:29,286 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 7 treesize of output 3 [2022-11-23 15:15:29,361 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-23 15:15:29,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 101 [2022-11-23 15:15:29,369 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 94 treesize of output 66 [2022-11-23 15:15:29,381 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 7 treesize of output 3 [2022-11-23 15:16:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 94 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:16:02,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:16:55,761 WARN L233 SmtUtils]: Spent 25.09s on a formula simplification. DAG size of input: 65 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:16:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 64 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-23 15:16:58,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436487796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:16:58,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [765027488] [2022-11-23 15:16:58,298 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-23 15:16:58,298 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:16:58,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:16:58,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:16:58,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:16:58,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,407 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 15:16:58,407 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 [2022-11-23 15:16:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,428 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 [2022-11-23 15:16:58,651 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 [2022-11-23 15:16:58,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,674 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 [2022-11-23 15:16:58,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,704 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 [2022-11-23 15:16:58,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,743 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 [2022-11-23 15:16:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,918 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-23 15:16:58,919 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 [2022-11-23 15:16:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:16:58,956 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 [2022-11-23 15:16:58,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:58,990 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 [2022-11-23 15:16:59,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,031 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 [2022-11-23 15:16:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,077 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 [2022-11-23 15:16:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,105 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 [2022-11-23 15:16:59,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:16:59,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:16:59,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:16:59,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:16:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:16:59,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:16:59,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:16:59,861 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-23 15:16:59,861 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 666 treesize of output 675 [2022-11-23 15:17:00,358 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-23 15:17:00,359 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 650 treesize of output 680 [2022-11-23 15:17:00,635 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-23 15:17:00,635 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 643 treesize of output 654 [2022-11-23 15:17:00,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:00,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:00,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:00,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:00,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:00,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:00,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:00,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:00,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:00,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:01,125 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-23 15:17:01,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 14 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 [2022-11-23 15:17:01,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:01,211 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-23 15:17:01,212 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 [2022-11-23 15:17:01,246 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 [2022-11-23 15:17:37,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:37,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 [2022-11-23 15:17:38,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:17:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:38,156 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 [2022-11-23 15:17:38,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:38,178 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 [2022-11-23 15:17:38,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:38,214 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 [2022-11-23 15:17:38,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:38,238 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 [2022-11-23 15:17:38,254 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 [2022-11-23 15:17:38,278 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 [2022-11-23 15:17:38,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:38,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:38,312 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 [2022-11-23 15:17:38,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:38,335 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 [2022-11-23 15:17:38,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:38,353 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 [2022-11-23 15:17:38,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:17:38,378 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 [2022-11-23 15:17:39,988 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 54 for LOIs [2022-11-23 15:17:40,049 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-23 15:17:40,794 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-11-23 15:17:40,840 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-23 15:17:40,862 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-23 15:17:40,929 INFO L180 IcfgInterpreter]: Interpretation finished