./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9 --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 a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 --- 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-6b4ec56 [2022-11-20 19:45:26,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:45:26,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:45:26,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:45:26,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:45:26,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:45:26,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:45:26,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:45:26,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:45:26,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:45:26,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:45:26,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:45:26,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:45:26,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:45:26,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:45:26,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:45:26,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:45:26,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:45:26,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:45:26,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:45:26,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:45:26,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:45:26,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:45:26,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:45:26,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:45:26,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:45:26,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:45:26,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:45:26,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:45:26,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:45:26,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:45:26,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:45:26,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:45:26,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:45:26,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:45:26,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:45:26,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:45:26,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:45:26,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:45:26,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:45:26,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:45:26,187 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 19:45:26,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:45:26,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:45:26,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:45:26,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:45:26,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:45:26,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:45:26,229 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:45:26,230 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:45:26,230 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:45:26,230 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:45:26,231 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:45:26,231 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:45:26,232 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:45:26,232 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:45:26,232 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:45:26,232 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:45:26,232 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:45:26,233 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:45:26,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:45:26,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:45:26,234 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:45:26,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:45:26,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:45:26,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:45:26,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:45:26,235 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:45:26,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:45:26,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:45:26,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:45:26,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:45:26,237 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:45:26,237 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:45:26,237 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:45:26,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:45:26,238 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:45:26,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:45:26,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:45:26,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:45:26,238 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_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa15b0860d2357f9ad3c8c6bab1d80cf83a6734355dc0b05c55121c837273 [2022-11-20 19:45:26,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:45:26,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:45:26,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:45:26,557 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:45:26,557 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:45:26,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-20 19:45:29,624 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:45:30,133 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:45:30,134 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i [2022-11-20 19:45:30,164 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/data/5c0f94f72/0764b3e02b324b1e895845da1937e196/FLAG9f136c730 [2022-11-20 19:45:30,183 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/data/5c0f94f72/0764b3e02b324b1e895845da1937e196 [2022-11-20 19:45:30,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:45:30,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:45:30,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:45:30,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:45:30,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:45:30,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:45:30" (1/1) ... [2022-11-20 19:45:30,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cfc13ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:30, skipping insertion in model container [2022-11-20 19:45:30,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:45:30" (1/1) ... [2022-11-20 19:45:30,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:45:30,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:45:30,540 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_41d99a51-115c-4893-a89c-5bf891c2fdec/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-20 19:45:30,548 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_41d99a51-115c-4893-a89c-5bf891c2fdec/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-20 19:45:31,586 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,587 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,588 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,589 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,590 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,606 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,608 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,610 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,611 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,617 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,625 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,626 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:31,627 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,092 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 19:45:32,093 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 19:45:32,095 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 19:45:32,096 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 19:45:32,098 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 19:45:32,100 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 19:45:32,101 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 19:45:32,102 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 19:45:32,109 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 19:45:32,110 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 19:45:32,321 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 19:45:32,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:45:32,370 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:45:32,388 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_41d99a51-115c-4893-a89c-5bf891c2fdec/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4493,4506] [2022-11-20 19:45:32,392 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_41d99a51-115c-4893-a89c-5bf891c2fdec/sv-benchmarks/c/aws-c-common/aws_linked_list_end_harness.i[4553,4566] [2022-11-20 19:45:32,497 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,499 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,503 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,508 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,509 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,516 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,525 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,526 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,527 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,528 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,532 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,533 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,533 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:45:32,591 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 19:45:32,592 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 19:45:32,593 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 19:45:32,594 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 19:45:32,600 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 19:45:32,601 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 19:45:32,602 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 19:45:32,603 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 19:45:32,604 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 19:45:32,604 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 19:45:32,650 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 19:45:32,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:45:32,938 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:45:32,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32 WrapperNode [2022-11-20 19:45:32,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:45:32,942 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:45:32,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:45:32,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:45:32,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,029 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,102 INFO L138 Inliner]: procedures = 679, calls = 1039, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 135 [2022-11-20 19:45:33,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:45:33,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:45:33,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:45:33,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:45:33,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,183 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:45:33,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:45:33,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:45:33,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:45:33,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (1/1) ... [2022-11-20 19:45:33,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:45:33,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:33,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:45:33,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:45:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:45:33,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 19:45:33,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 19:45:33,289 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-20 19:45:33,289 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-20 19:45:33,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-20 19:45:33,290 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-20 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:45:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 19:45:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:45:33,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:45:33,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 19:45:33,292 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 19:45:33,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:45:33,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 19:45:33,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 19:45:33,293 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-20 19:45:33,293 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-20 19:45:33,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:45:33,587 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:45:33,589 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:45:33,929 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:45:34,105 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:45:34,106 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 19:45:34,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:45:34 BoogieIcfgContainer [2022-11-20 19:45:34,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:45:34,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:45:34,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:45:34,116 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:45:34,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:45:30" (1/3) ... [2022-11-20 19:45:34,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dc81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:45:34, skipping insertion in model container [2022-11-20 19:45:34,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:45:32" (2/3) ... [2022-11-20 19:45:34,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dc81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:45:34, skipping insertion in model container [2022-11-20 19:45:34,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:45:34" (3/3) ... [2022-11-20 19:45:34,123 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_end_harness.i [2022-11-20 19:45:34,143 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:45:34,144 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:45:34,189 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:45:34,195 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;@4e3bab70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:45:34,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:45:34,199 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) [2022-11-20 19:45:34,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 19:45:34,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:34,209 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] [2022-11-20 19:45:34,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:34,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:34,215 INFO L85 PathProgramCache]: Analyzing trace with hash -901301471, now seen corresponding path program 1 times [2022-11-20 19:45:34,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:34,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255834278] [2022-11-20 19:45:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:34,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:45:35,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:35,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255834278] [2022-11-20 19:45:35,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255834278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:45:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353754863] [2022-11-20 19:45:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:35,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:35,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:35,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:45:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 19:45:35,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:35,538 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 [2022-11-20 19:45:35,552 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 [2022-11-20 19:45:35,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:35,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:35,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:35,636 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 [2022-11-20 19:45:35,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:35,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:35,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:35,660 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 [2022-11-20 19:45:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:38,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:38,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:38,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:38,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:38,296 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-20 19:45:38,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 8 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 132 treesize of output 78 [2022-11-20 19:45:38,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:38,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:38,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:38,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:38,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:38,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:38,328 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 19:45:38,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 4 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 73 treesize of output 31 [2022-11-20 19:45:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:45:38,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:38,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353754863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:38,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:45:38,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-20 19:45:38,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418317677] [2022-11-20 19:45:38,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:38,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 19:45:38,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:38,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 19:45:38,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-20 19:45:38,385 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 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 19:45:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:38,911 INFO L93 Difference]: Finished difference Result 115 states and 170 transitions. [2022-11-20 19:45:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 19:45:38,913 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-20 19:45:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:38,922 INFO L225 Difference]: With dead ends: 115 [2022-11-20 19:45:38,924 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 19:45:38,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:45:38,930 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:38,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 249 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 121 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-11-20 19:45:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 19:45:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2022-11-20 19:45:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-11-20 19:45:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 71 transitions. [2022-11-20 19:45:39,005 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 71 transitions. Word has length 37 [2022-11-20 19:45:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:39,006 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 71 transitions. [2022-11-20 19:45:39,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 19:45:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 71 transitions. [2022-11-20 19:45:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 19:45:39,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:39,010 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] [2022-11-20 19:45:39,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:39,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:39,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2094600787, now seen corresponding path program 1 times [2022-11-20 19:45:39,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:39,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123907833] [2022-11-20 19:45:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:39,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:45:39,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123907833] [2022-11-20 19:45:39,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123907833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:45:39,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229284801] [2022-11-20 19:45:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:39,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:39,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:39,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:39,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:45:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:39,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-20 19:45:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:39,898 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 [2022-11-20 19:45:39,913 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 [2022-11-20 19:45:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:39,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:39,991 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 [2022-11-20 19:45:39,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,000 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 [2022-11-20 19:45:40,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,026 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 [2022-11-20 19:45:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,039 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 [2022-11-20 19:45:40,160 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-20 19:45:40,161 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 [2022-11-20 19:45:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,175 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 [2022-11-20 19:45:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,191 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 46 treesize of output 39 [2022-11-20 19:45:40,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,200 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 [2022-11-20 19:45:40,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-20 19:45:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:40,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-11-20 19:45:40,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:45:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:45:42,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:48,055 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 8)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse1 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16))) (and (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0)))) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0))))) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$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$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (store (store |c_#memory_$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_end_harness_~#list~0#1.base|) .cse1) 0)) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0))))) is different from false [2022-11-20 19:45:48,214 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16)) (.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 8))) (and (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse0 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse3) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse5) 0)) (= v_ArrVal_212 0))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse6 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse6 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|) 0))))) (forall ((v_ArrVal_212 Int)) (let ((.cse7 (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 24))) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_223 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int))) (not (= (select (select (store (store .cse4 v_ArrVal_212 v_ArrVal_224) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse4 v_ArrVal_212 v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_223)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse7) 0))) (= v_ArrVal_212 0) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (not (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_212)))) (store (store .cse8 v_ArrVal_212 v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse8 v_ArrVal_212 v_ArrVal_228) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_212))) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) .cse7) 0)))))) (forall ((v_ArrVal_212 Int)) (or (not (< v_ArrVal_212 |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_228 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |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_end_harness_~#list~0#1.base|) .cse5) 0)) (= v_ArrVal_212 0))) (or (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base| 0))))) is different from false [2022-11-20 19:45:48,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:48,296 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 62 treesize of output 55 [2022-11-20 19:45:48,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:48,334 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 153 treesize of output 149 [2022-11-20 19:45:48,353 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 136 treesize of output 128 [2022-11-20 19:45:48,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 124 [2022-11-20 19:45:48,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:48,397 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 62 treesize of output 55 [2022-11-20 19:45:48,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:48,421 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 348 treesize of output 310 [2022-11-20 19:45:48,445 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 [2022-11-20 19:45:48,499 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 148 treesize of output 144 [2022-11-20 19:45:48,661 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 8 treesize of output 4 [2022-11-20 19:45:48,674 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 8 treesize of output 4 [2022-11-20 19:45:48,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:48,724 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 54 treesize of output 70 [2022-11-20 19:45:48,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:48,769 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 65 treesize of output 75 [2022-11-20 19:45:48,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:48,869 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 [2022-11-20 19:45:48,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:48,885 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 63 treesize of output 55 [2022-11-20 19:45:48,909 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:48,909 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 [2022-11-20 19:45:48,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:48,928 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 126 treesize of output 104 [2022-11-20 19:45:48,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:48,940 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 31 treesize of output 29 [2022-11-20 19:45:48,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:48,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:48,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:48,964 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 19:45:48,965 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 47 treesize of output 39 [2022-11-20 19:45:48,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:48,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:48,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:48,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:48,989 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 71 treesize of output 57 [2022-11-20 19:45:48,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:49,002 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 20 treesize of output 18 [2022-11-20 19:45:49,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:49,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:49,050 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-20 19:45:49,051 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 [2022-11-20 19:45:49,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:49,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:49,066 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-20 19:45:49,067 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 [2022-11-20 19:45:49,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:49,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:49,079 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-20 19:45:49,079 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 [2022-11-20 19:45:49,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:49,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:49,090 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-20 19:45:49,091 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 [2022-11-20 19:45:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-20 19:45:49,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229284801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [181435475] [2022-11-20 19:45:49,239 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-20 19:45:49,240 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:45:49,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:45:49,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:45:49,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:45:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,373 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:45:49,373 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 [2022-11-20 19:45:49,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,403 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 [2022-11-20 19:45:49,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,758 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 [2022-11-20 19:45:49,794 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 [2022-11-20 19:45:49,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,820 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 [2022-11-20 19:45:49,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,846 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 [2022-11-20 19:45:49,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:49,973 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-20 19:45:49,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-20 19:45:50,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:50,047 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:45:50,048 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 [2022-11-20 19:45:50,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,089 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 [2022-11-20 19:45:50,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,120 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 [2022-11-20 19:45:50,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,215 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:45:50,215 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 [2022-11-20 19:45:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:50,262 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 [2022-11-20 19:45:50,356 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 [2022-11-20 19:45:50,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:45:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,390 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 [2022-11-20 19:45:50,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,411 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 [2022-11-20 19:45:50,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,433 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 [2022-11-20 19:45:50,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,453 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 [2022-11-20 19:45:50,465 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 [2022-11-20 19:45:50,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,499 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 [2022-11-20 19:45:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,520 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 [2022-11-20 19:45:50,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,545 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 [2022-11-20 19:45:50,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:50,558 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 [2022-11-20 19:45:51,180 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-20 19:45:51,461 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-11-20 19:45:51,513 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:45:51,534 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:45:54,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [181435475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:54,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:45:54,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2022-11-20 19:45:54,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55646124] [2022-11-20 19:45:54,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:54,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 19:45:54,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:54,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 19:45:54,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=777, Unknown=2, NotChecked=114, Total=992 [2022-11-20 19:45:54,990 INFO L87 Difference]: Start difference. First operand 54 states and 71 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) [2022-11-20 19:45:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:55,103 INFO L93 Difference]: Finished difference Result 98 states and 125 transitions. [2022-11-20 19:45:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 19:45:55,103 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 [2022-11-20 19:45:55,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:55,106 INFO L225 Difference]: With dead ends: 98 [2022-11-20 19:45:55,106 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 19:45:55,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=99, Invalid=777, Unknown=2, NotChecked=114, Total=992 [2022-11-20 19:45:55,108 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:55,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 213 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-11-20 19:45:55,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 19:45:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-20 19:45:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 19:45:55,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-11-20 19:45:55,123 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 38 [2022-11-20 19:45:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:55,124 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-11-20 19:45:55,124 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) [2022-11-20 19:45:55,124 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-11-20 19:45:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 19:45:55,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:55,126 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] [2022-11-20 19:45:55,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 19:45:55,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:55,333 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash -896843747, now seen corresponding path program 1 times [2022-11-20 19:45:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:55,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847084992] [2022-11-20 19:45:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:55,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:45:55,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847084992] [2022-11-20 19:45:55,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847084992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:45:55,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502690088] [2022-11-20 19:45:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:55,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:55,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:55,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:45:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:45:55,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:55,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:55,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502690088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:55,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:45:55,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-20 19:45:55,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004169437] [2022-11-20 19:45:55,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:55,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:45:55,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:45:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:45:55,789 INFO L87 Difference]: Start difference. First operand 47 states and 59 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) [2022-11-20 19:45:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:55,981 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2022-11-20 19:45:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:45:55,981 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 [2022-11-20 19:45:55,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:55,983 INFO L225 Difference]: With dead ends: 86 [2022-11-20 19:45:55,985 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 19:45:55,986 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 [2022-11-20 19:45:55,988 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 141 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 [2022-11-20 19:45:55,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 141 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:45:55,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 19:45:56,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-20 19:45:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 19:45:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-11-20 19:45:56,012 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 39 [2022-11-20 19:45:56,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:56,012 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-11-20 19:45:56,012 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) [2022-11-20 19:45:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-11-20 19:45:56,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 19:45:56,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:56,019 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] [2022-11-20 19:45:56,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:56,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:56,226 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:56,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2017391933, now seen corresponding path program 1 times [2022-11-20 19:45:56,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:56,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366822792] [2022-11-20 19:45:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:56,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:45:56,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:56,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366822792] [2022-11-20 19:45:56,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366822792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:45:56,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088680609] [2022-11-20 19:45:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:56,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:56,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:56,424 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:56,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:45:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:56,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:45:56,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:56,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:56,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088680609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:56,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:45:56,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-20 19:45:56,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086117298] [2022-11-20 19:45:56,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:45:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:45:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-20 19:45:56,702 INFO L87 Difference]: Start difference. First operand 52 states and 67 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) [2022-11-20 19:45:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:56,952 INFO L93 Difference]: Finished difference Result 103 states and 141 transitions. [2022-11-20 19:45:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:45:56,953 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 [2022-11-20 19:45:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:56,955 INFO L225 Difference]: With dead ends: 103 [2022-11-20 19:45:56,955 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 19:45:56,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-20 19:45:56,957 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 65 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 165 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 [2022-11-20 19:45:56,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 165 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:45:56,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 19:45:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-11-20 19:45:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 19:45:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-20 19:45:56,974 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 41 [2022-11-20 19:45:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:56,974 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-20 19:45:56,975 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) [2022-11-20 19:45:56,975 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-20 19:45:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 19:45:56,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:56,976 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] [2022-11-20 19:45:56,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:57,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:57,182 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:57,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash -292506448, now seen corresponding path program 1 times [2022-11-20 19:45:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:57,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929959548] [2022-11-20 19:45:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:57,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:45:57,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929959548] [2022-11-20 19:45:57,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929959548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:45:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335369489] [2022-11-20 19:45:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:57,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:57,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:57,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:57,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:45:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:45:57,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 19:45:57,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:57,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335369489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:57,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:45:57,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-20 19:45:57,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474758485] [2022-11-20 19:45:57,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:57,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:45:57,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:45:57,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:45:57,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:45:57,681 INFO L87 Difference]: Start difference. First operand 54 states and 70 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) [2022-11-20 19:45:57,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:57,739 INFO L93 Difference]: Finished difference Result 104 states and 145 transitions. [2022-11-20 19:45:57,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:45:57,740 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 [2022-11-20 19:45:57,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:57,741 INFO L225 Difference]: With dead ends: 104 [2022-11-20 19:45:57,741 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 19:45:57,742 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 [2022-11-20 19:45:57,743 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:57,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 92 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 19:45:57,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 19:45:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2022-11-20 19:45:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-20 19:45:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-11-20 19:45:57,758 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 42 [2022-11-20 19:45:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:57,759 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-11-20 19:45:57,759 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) [2022-11-20 19:45:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-11-20 19:45:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 19:45:57,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:57,762 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] [2022-11-20 19:45:57,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:57,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:57,962 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:45:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash 449901180, now seen corresponding path program 1 times [2022-11-20 19:45:57,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:45:57,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991941405] [2022-11-20 19:45:57,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:57,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:45:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:58,202 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:45:58,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:45:58,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991941405] [2022-11-20 19:45:58,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991941405] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:45:58,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435249058] [2022-11-20 19:45:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:58,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:58,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:58,205 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:58,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:45:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 19:45:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:58,538 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-20 19:45:58,539 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 [2022-11-20 19:45:58,560 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 19:45:58,560 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 [2022-11-20 19:45:58,571 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 [2022-11-20 19:45:58,581 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 [2022-11-20 19:45:58,631 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 48 treesize of output 21 [2022-11-20 19:45:58,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 19:46:08,864 WARN L233 SmtUtils]: Spent 8.43s 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) [2022-11-20 19:46:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 19:46:12,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:46:17,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435249058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639929664] [2022-11-20 19:46:17,346 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-20 19:46:17,347 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:46:17,347 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:46:17,347 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:46:17,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:46:17,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,420 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:46:17,421 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 [2022-11-20 19:46:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,447 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 [2022-11-20 19:46:17,692 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 [2022-11-20 19:46:17,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,711 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 [2022-11-20 19:46:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,737 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 [2022-11-20 19:46:17,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,769 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 [2022-11-20 19:46:17,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,828 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 [2022-11-20 19:46:17,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,861 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 [2022-11-20 19:46:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,923 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 [2022-11-20 19:46:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:17,957 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 [2022-11-20 19:46:18,729 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 129 for LOIs [2022-11-20 19:46:19,324 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-20 19:46:19,404 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:46:19,422 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 23 for LOIs [2022-11-20 19:46:19,493 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:46:26,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [639929664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:26,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:46:26,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-20 19:46:26,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833654936] [2022-11-20 19:46:26,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:26,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 19:46:26,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 19:46:26,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 19:46:26,557 INFO L87 Difference]: Start difference. First operand 55 states and 71 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) [2022-11-20 19:46:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:27,385 INFO L93 Difference]: Finished difference Result 127 states and 175 transitions. [2022-11-20 19:46:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 19:46:27,386 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 [2022-11-20 19:46:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:27,387 INFO L225 Difference]: With dead ends: 127 [2022-11-20 19:46:27,388 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 19:46:27,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 19:46:27,389 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 11 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:27,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 410 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 221 Invalid, 0 Unknown, 183 Unchecked, 0.8s Time] [2022-11-20 19:46:27,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 19:46:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2022-11-20 19:46:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 43 states have internal predecessors, (52), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2022-11-20 19:46:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-11-20 19:46:27,416 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 45 [2022-11-20 19:46:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:27,417 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-11-20 19:46:27,417 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) [2022-11-20 19:46:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-11-20 19:46:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 19:46:27,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:27,419 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] [2022-11-20 19:46:27,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:27,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:27,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:27,621 INFO L85 PathProgramCache]: Analyzing trace with hash 452556718, now seen corresponding path program 1 times [2022-11-20 19:46:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:27,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389867082] [2022-11-20 19:46:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:27,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:46:27,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:27,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389867082] [2022-11-20 19:46:27,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389867082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:27,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088025394] [2022-11-20 19:46:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:27,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:27,909 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:27,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 19:46:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:28,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 19:46:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:28,302 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 [2022-11-20 19:46:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:28,308 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 [2022-11-20 19:46:28,368 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-20 19:46:28,369 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 [2022-11-20 19:46:28,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:28,375 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 [2022-11-20 19:46:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:28,384 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 [2022-11-20 19:46:28,393 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 [2022-11-20 19:46:28,503 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| Int) (v_DerPreprocessor_15 (Array Int Int)) (v_DerPreprocessor_16 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|))) (let ((.cse0 (select .cse1 24))) (and (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|) (= .cse0 (select v_DerPreprocessor_16 24)) (= .cse0 (select .cse1 0)) (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_15) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_16) .cse0 v_DerPreprocessor_15) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_16) .cse0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_51|))))) is different from true [2022-11-20 19:46:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 19:46:32,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:37,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 590 treesize of output 546 [2022-11-20 19:46:37,346 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 546 treesize of output 518 [2022-11-20 19:46:37,363 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 518 treesize of output 462 [2022-11-20 19:46:37,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:37,719 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 1 case distinctions, treesize of input 219 treesize of output 148 [2022-11-20 19:46:37,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:37,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 835 treesize of output 725 [2022-11-20 19:46:37,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:37,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 767 treesize of output 747 [2022-11-20 19:46:37,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:37,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 747 treesize of output 737 [2022-11-20 19:46:37,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:37,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 789 treesize of output 773 [2022-11-20 19:46:37,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:37,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 773 treesize of output 765 [2022-11-20 19:46:38,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2022-11-20 19:46:38,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 180 [2022-11-20 19:46:38,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-11-20 19:46:38,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-11-20 19:46:38,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 109 [2022-11-20 19:46:38,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:46:38,548 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 314 treesize of output 280 [2022-11-20 19:46:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:46:40,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088025394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:40,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665705084] [2022-11-20 19:46:40,120 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-20 19:46:40,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:46:40,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:46:40,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:46:40,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:46:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,190 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 19:46:40,190 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 [2022-11-20 19:46:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,271 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:46:40,272 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 [2022-11-20 19:46:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,526 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 [2022-11-20 19:46:40,548 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 [2022-11-20 19:46:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,575 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 [2022-11-20 19:46:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,604 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 [2022-11-20 19:46:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,652 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 [2022-11-20 19:46:40,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,679 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 [2022-11-20 19:46:40,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:40,738 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:46:40,738 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 [2022-11-20 19:46:40,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,845 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:46:40,846 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 [2022-11-20 19:46:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:40,907 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 [2022-11-20 19:46:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,936 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 [2022-11-20 19:46:40,999 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 [2022-11-20 19:46:41,018 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 [2022-11-20 19:46:41,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:41,043 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 [2022-11-20 19:46:41,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:41,074 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 [2022-11-20 19:46:41,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:41,099 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 [2022-11-20 19:46:41,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:41,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:41,116 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 [2022-11-20 19:46:41,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:41,157 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 [2022-11-20 19:46:41,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:41,170 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 [2022-11-20 19:46:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:41,185 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 [2022-11-20 19:46:41,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:41,207 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 [2022-11-20 19:46:42,191 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-20 19:46:42,650 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-20 19:46:42,711 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:46:42,733 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-20 19:46:42,817 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:46:50,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [665705084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:50,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:46:50,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 19, 12] total 52 [2022-11-20 19:46:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137550943] [2022-11-20 19:46:50,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:50,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 19:46:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:50,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 19:46:50,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2285, Unknown=91, NotChecked=98, Total=2652 [2022-11-20 19:46:50,119 INFO L87 Difference]: Start difference. First operand 66 states and 86 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) [2022-11-20 19:46:51,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:51,491 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2022-11-20 19:46:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 19:46:51,492 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 [2022-11-20 19:46:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:51,494 INFO L225 Difference]: With dead ends: 120 [2022-11-20 19:46:51,494 INFO L226 Difference]: Without dead ends: 73 [2022-11-20 19:46:51,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=194, Invalid=2469, Unknown=97, NotChecked=102, Total=2862 [2022-11-20 19:46:51,496 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:51,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 193 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 225 Invalid, 0 Unknown, 183 Unchecked, 0.6s Time] [2022-11-20 19:46:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-20 19:46:51,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2022-11-20 19:46:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (18), 13 states have call predecessors, (18), 13 states have call successors, (18) [2022-11-20 19:46:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-11-20 19:46:51,534 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 46 [2022-11-20 19:46:51,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:51,535 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-11-20 19:46:51,535 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) [2022-11-20 19:46:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-11-20 19:46:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 19:46:51,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:51,537 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] [2022-11-20 19:46:51,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:51,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:51,745 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:46:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:51,746 INFO L85 PathProgramCache]: Analyzing trace with hash -580673182, now seen corresponding path program 1 times [2022-11-20 19:46:51,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:51,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475283301] [2022-11-20 19:46:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:51,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:46:52,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:52,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475283301] [2022-11-20 19:46:52,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475283301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:52,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153261969] [2022-11-20 19:46:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:52,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:52,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:52,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:52,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 19:46:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:52,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 19:46:52,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 19:46:56,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:46:56,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153261969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:46:56,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656534615] [2022-11-20 19:46:56,486 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:46:56,486 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:46:56,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:46:56,487 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:46:56,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:46:56,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,563 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 19:46:56,564 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 [2022-11-20 19:46:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,644 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:46:56,644 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 [2022-11-20 19:46:56,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,947 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 [2022-11-20 19:46:56,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:56,976 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 [2022-11-20 19:46:57,006 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 [2022-11-20 19:46:57,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,035 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 [2022-11-20 19:46:57,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,092 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 [2022-11-20 19:46:57,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,128 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 [2022-11-20 19:46:57,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,174 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 [2022-11-20 19:46:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:57,202 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 [2022-11-20 19:46:57,967 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 126 for LOIs [2022-11-20 19:46:59,043 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-20 19:46:59,108 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:46:59,125 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:46:59,190 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:47:08,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1656534615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:47:08,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:47:08,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-20 19:47:08,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3248542] [2022-11-20 19:47:08,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:47:08,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 19:47:08,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:47:08,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 19:47:08,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 19:47:08,600 INFO L87 Difference]: Start difference. First operand 62 states and 80 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) [2022-11-20 19:47:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:47:11,441 INFO L93 Difference]: Finished difference Result 134 states and 171 transitions. [2022-11-20 19:47:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 19:47:11,442 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 [2022-11-20 19:47:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:47:11,443 INFO L225 Difference]: With dead ends: 134 [2022-11-20 19:47:11,443 INFO L226 Difference]: Without dead ends: 82 [2022-11-20 19:47:11,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=240, Invalid=1482, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 19:47:11,445 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 42 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:47:11,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 216 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-11-20 19:47:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-20 19:47:11,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-20 19:47:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 52 states have (on average 1.25) internal successors, (65), 55 states have internal predecessors, (65), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (22), 15 states have call predecessors, (22), 16 states have call successors, (22) [2022-11-20 19:47:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-11-20 19:47:11,482 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 47 [2022-11-20 19:47:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:47:11,482 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-11-20 19:47:11,482 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) [2022-11-20 19:47:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-11-20 19:47:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 19:47:11,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:47:11,484 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:47:11,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:47:11,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 19:47:11,690 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:47:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:47:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1971298836, now seen corresponding path program 1 times [2022-11-20 19:47:11,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:47:11,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446371258] [2022-11-20 19:47:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:11,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:47:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:47:12,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:47:12,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446371258] [2022-11-20 19:47:12,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446371258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:47:12,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507787836] [2022-11-20 19:47:12,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:12,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:47:12,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:47:12,612 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:47:12,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:47:12,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-20 19:47:12,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:47:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 19:47:15,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:47:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:47:15,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507787836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:47:15,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352997344] [2022-11-20 19:47:15,846 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:47:15,846 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:47:15,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:47:15,846 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:47:15,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:47:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:15,918 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:47:15,919 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 [2022-11-20 19:47:15,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:15,938 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 [2022-11-20 19:47:16,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,146 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 [2022-11-20 19:47:16,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,175 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 [2022-11-20 19:47:16,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,200 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 [2022-11-20 19:47:16,225 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 [2022-11-20 19:47:16,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:47:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:47:16,302 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:47:16,302 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 [2022-11-20 19:47:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,380 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-20 19:47:16,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-20 19:47:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,478 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:47:16,478 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 [2022-11-20 19:47:16,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,511 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 [2022-11-20 19:47:16,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,543 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 [2022-11-20 19:47:16,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,584 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 [2022-11-20 19:47:16,654 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 [2022-11-20 19:47:16,664 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 [2022-11-20 19:47:16,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:47:16,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,702 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 [2022-11-20 19:47:16,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-20 19:47:16,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-20 19:47:16,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,786 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 [2022-11-20 19:47:16,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,817 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 [2022-11-20 19:47:16,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,846 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 [2022-11-20 19:47:16,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,867 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 [2022-11-20 19:47:16,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:16,880 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 [2022-11-20 19:47:17,848 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-20 19:47:18,729 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-20 19:47:18,779 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:47:18,796 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:47:18,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:47:24,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1352997344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:47:24,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:47:24,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-20 19:47:24,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525349774] [2022-11-20 19:47:24,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:47:24,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 19:47:24,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:47:24,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 19:47:24,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 19:47:24,993 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 19:47:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:47:26,420 INFO L93 Difference]: Finished difference Result 147 states and 183 transitions. [2022-11-20 19:47:26,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 19:47:26,420 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-20 19:47:26,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:47:26,423 INFO L225 Difference]: With dead ends: 147 [2022-11-20 19:47:26,424 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 19:47:26,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 19:47:26,428 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:47:26,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 178 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 281 Invalid, 0 Unknown, 204 Unchecked, 0.7s Time] [2022-11-20 19:47:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 19:47:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-11-20 19:47:26,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 64 states have internal predecessors, (74), 18 states have call successors, (18), 12 states have call predecessors, (18), 14 states have return successors, (21), 16 states have call predecessors, (21), 17 states have call successors, (21) [2022-11-20 19:47:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2022-11-20 19:47:26,490 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 48 [2022-11-20 19:47:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:47:26,490 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2022-11-20 19:47:26,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 19:47:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2022-11-20 19:47:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 19:47:26,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:47:26,492 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] [2022-11-20 19:47:26,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 19:47:26,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:47:26,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:47:26,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:47:26,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1296101873, now seen corresponding path program 1 times [2022-11-20 19:47:26,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:47:26,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700182343] [2022-11-20 19:47:26,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:26,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:47:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 19:47:26,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:47:26,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700182343] [2022-11-20 19:47:26,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700182343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:47:26,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923210281] [2022-11-20 19:47:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:26,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:47:26,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:47:26,958 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:47:26,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 19:47:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:27,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 19:47:27,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:47:31,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:47:31,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:47:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 19:47:36,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923210281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:47:36,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263548452] [2022-11-20 19:47:36,868 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:47:36,869 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:47:36,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:47:36,869 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:47:36,869 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:47:36,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:36,933 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 19:47:36,934 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 [2022-11-20 19:47:36,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,000 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:47:37,000 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 [2022-11-20 19:47:37,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,214 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 [2022-11-20 19:47:37,255 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 [2022-11-20 19:47:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,279 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 [2022-11-20 19:47:37,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,311 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 [2022-11-20 19:47:37,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,362 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 [2022-11-20 19:47:37,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,413 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 [2022-11-20 19:47:37,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,437 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 [2022-11-20 19:47:37,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:37,470 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 [2022-11-20 19:47:39,057 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-20 19:47:39,156 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 146 for LOIs [2022-11-20 19:47:40,721 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:47:40,722 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:47:40,739 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:47:40,806 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:47:54,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4782#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$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$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3| Int)) (and (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 1) (not (= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (<= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24)) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24)) 0) 16) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (not (= 4 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 16) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_3|) 24) 0))) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:47:54,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:47:54,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:47:54,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 11] total 26 [2022-11-20 19:47:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926885063] [2022-11-20 19:47:54,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:47:54,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 19:47:54,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:47:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 19:47:54,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2440, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 19:47:54,326 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand has 26 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 10 states have call successors, (21), 4 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-20 19:47:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:47:56,942 INFO L93 Difference]: Finished difference Result 193 states and 270 transitions. [2022-11-20 19:47:56,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 19:47:56,943 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 10 states have call successors, (21), 4 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) Word has length 48 [2022-11-20 19:47:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:47:56,945 INFO L225 Difference]: With dead ends: 193 [2022-11-20 19:47:56,945 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 19:47:56,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=472, Invalid=3950, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 19:47:56,947 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 111 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:47:56,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 324 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 652 Invalid, 0 Unknown, 117 Unchecked, 1.0s Time] [2022-11-20 19:47:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 19:47:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 81. [2022-11-20 19:47:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-11-20 19:47:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-11-20 19:47:56,991 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 48 [2022-11-20 19:47:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:47:56,991 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-11-20 19:47:56,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 10 states have call successors, (21), 4 states have call predecessors, (21), 10 states have return successors, (21), 8 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-20 19:47:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-11-20 19:47:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 19:47:56,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:47:56,992 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:47:56,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:47:57,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:47:57,198 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:47:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:47:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1126327094, now seen corresponding path program 1 times [2022-11-20 19:47:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:47:57,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377735587] [2022-11-20 19:47:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:57,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:47:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 19:47:57,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:47:57,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377735587] [2022-11-20 19:47:57,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377735587] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:47:57,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361301608] [2022-11-20 19:47:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:57,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:47:57,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:47:57,445 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:47:57,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 19:47:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:57,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 19:47:57,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:06,613 WARN L233 SmtUtils]: Spent 6.67s 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) [2022-11-20 19:48:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:11,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:48:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:48:16,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361301608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:48:16,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612610676] [2022-11-20 19:48:16,529 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:48:16,529 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:48:16,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:48:16,531 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:48:16,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:48:16,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,607 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:48:16,607 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 [2022-11-20 19:48:16,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,634 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 [2022-11-20 19:48:16,867 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 [2022-11-20 19:48:16,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,889 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 [2022-11-20 19:48:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,911 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 [2022-11-20 19:48:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,935 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 [2022-11-20 19:48:16,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:16,994 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 [2022-11-20 19:48:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:17,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:17,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-20 19:48:17,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:17,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:17,059 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 [2022-11-20 19:48:17,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:17,086 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 [2022-11-20 19:48:18,522 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-20 19:48:18,594 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-20 19:48:19,354 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:48:19,356 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:48:19,371 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:48:19,443 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:48:31,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5602#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54| Int)) (and (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 1) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 16) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 4)) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= 0 (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 16)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0) 0)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 24) 0) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 8) 0) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_54|) 0)) 8) 0))) (= (select |#valid| 3) 1) (= (select (select |#memory_$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)) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:48:31,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:48:31,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:48:31,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 7] total 27 [2022-11-20 19:48:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601810202] [2022-11-20 19:48:31,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:48:31,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 19:48:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 19:48:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2557, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 19:48:31,773 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 27 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 25 states have internal predecessors, (70), 11 states have call successors, (21), 5 states have call predecessors, (21), 11 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-20 19:48:42,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:42,931 INFO L93 Difference]: Finished difference Result 211 states and 296 transitions. [2022-11-20 19:48:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 19:48:42,932 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 25 states have internal predecessors, (70), 11 states have call successors, (21), 5 states have call predecessors, (21), 11 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) Word has length 56 [2022-11-20 19:48:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:42,934 INFO L225 Difference]: With dead ends: 211 [2022-11-20 19:48:42,934 INFO L226 Difference]: Without dead ends: 164 [2022-11-20 19:48:42,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 33.1s TimeCoverageRelationStatistics Valid=582, Invalid=6898, Unknown=2, NotChecked=0, Total=7482 [2022-11-20 19:48:42,940 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 114 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:42,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 762 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1332 Invalid, 0 Unknown, 448 Unchecked, 1.3s Time] [2022-11-20 19:48:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-20 19:48:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 98. [2022-11-20 19:48:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 68 states have internal predecessors, (74), 19 states have call successors, (19), 12 states have call predecessors, (19), 15 states have return successors, (22), 17 states have call predecessors, (22), 18 states have call successors, (22) [2022-11-20 19:48:43,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2022-11-20 19:48:43,010 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 56 [2022-11-20 19:48:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:43,011 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2022-11-20 19:48:43,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 25 states have internal predecessors, (70), 11 states have call successors, (21), 5 states have call predecessors, (21), 11 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-20 19:48:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2022-11-20 19:48:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 19:48:43,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:43,013 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:43,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:43,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:43,221 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:43,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1290419280, now seen corresponding path program 1 times [2022-11-20 19:48:43,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:43,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028025982] [2022-11-20 19:48:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:48:43,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:43,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028025982] [2022-11-20 19:48:43,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028025982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:43,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230003930] [2022-11-20 19:48:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:43,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:43,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:43,931 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:43,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 19:48:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:44,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 19:48:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:44,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:48:45,206 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 19 treesize of output 11 [2022-11-20 19:48:45,342 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:48:45,343 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-20 19:48:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 19:48:45,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230003930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:48:45,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2105933059] [2022-11-20 19:48:45,521 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:48:45,521 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:48:45,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:48:45,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:48:45,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:48:45,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,587 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:48:45,587 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 [2022-11-20 19:48:45,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,605 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 [2022-11-20 19:48:45,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,807 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 [2022-11-20 19:48:45,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,833 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 [2022-11-20 19:48:45,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,870 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 [2022-11-20 19:48:45,897 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 [2022-11-20 19:48:45,941 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 [2022-11-20 19:48:45,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,959 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 [2022-11-20 19:48:45,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:45,990 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 [2022-11-20 19:48:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:46,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:46,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:46,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:46,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:46,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:46,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:46,018 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 [2022-11-20 19:48:47,468 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-20 19:48:47,538 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-20 19:48:48,290 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:48:48,292 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:48:48,308 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:48:48,365 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:49:02,007 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6537#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) (<= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24)) 0) 16) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 16) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24)) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24) 0) (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24)) 0)) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|)) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| 0)) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| 4)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 8) 0) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 1) (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 24)) (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|)) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_11|) 16)))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$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)) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:49:02,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:49:02,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:49:02,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 15] total 37 [2022-11-20 19:49:02,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151319015] [2022-11-20 19:49:02,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:49:02,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 19:49:02,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:02,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 19:49:02,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3687, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 19:49:02,010 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand has 37 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 15 states have call successors, (23), 3 states have call predecessors, (23), 9 states have return successors, (23), 12 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-20 19:49:04,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:49:04,106 INFO L93 Difference]: Finished difference Result 192 states and 256 transitions. [2022-11-20 19:49:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 19:49:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 15 states have call successors, (23), 3 states have call predecessors, (23), 9 states have return successors, (23), 12 states have call predecessors, (23), 15 states have call successors, (23) Word has length 58 [2022-11-20 19:49:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:49:04,109 INFO L225 Difference]: With dead ends: 192 [2022-11-20 19:49:04,109 INFO L226 Difference]: Without dead ends: 150 [2022-11-20 19:49:04,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 135 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=606, Invalid=6534, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 19:49:04,111 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 210 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:49:04,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 791 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1018 Invalid, 0 Unknown, 173 Unchecked, 0.9s Time] [2022-11-20 19:49:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-20 19:49:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2022-11-20 19:49:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 73 states have (on average 1.178082191780822) internal successors, (86), 78 states have internal predecessors, (86), 26 states have call successors, (26), 12 states have call predecessors, (26), 16 states have return successors, (35), 25 states have call predecessors, (35), 25 states have call successors, (35) [2022-11-20 19:49:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2022-11-20 19:49:04,168 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 58 [2022-11-20 19:49:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:04,168 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2022-11-20 19:49:04,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 15 states have call successors, (23), 3 states have call predecessors, (23), 9 states have return successors, (23), 12 states have call predecessors, (23), 15 states have call successors, (23) [2022-11-20 19:49:04,169 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2022-11-20 19:49:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 19:49:04,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:04,170 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:49:04,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 19:49:04,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 19:49:04,375 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:04,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:04,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1101091191, now seen corresponding path program 2 times [2022-11-20 19:49:04,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:04,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163587375] [2022-11-20 19:49:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:04,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 19:49:07,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:07,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163587375] [2022-11-20 19:49:07,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163587375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:07,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901580933] [2022-11-20 19:49:07,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:49:07,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:07,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:49:07,660 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:49:07,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 19:49:07,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 19:49:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:49:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 19:49:07,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:49:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 19:49:14,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:49:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 19:49:18,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901580933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:49:18,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228494918] [2022-11-20 19:49:18,288 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:49:18,288 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:49:18,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:49:18,288 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:49:18,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:49:18,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,389 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:49:18,389 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 [2022-11-20 19:49:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,405 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 [2022-11-20 19:49:18,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,598 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 [2022-11-20 19:49:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,624 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 [2022-11-20 19:49:18,649 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 [2022-11-20 19:49:18,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,673 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 [2022-11-20 19:49:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,734 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 [2022-11-20 19:49:18,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,755 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 [2022-11-20 19:49:18,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,786 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 [2022-11-20 19:49:18,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:18,815 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 [2022-11-20 19:49:20,356 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-11-20 19:49:20,423 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-20 19:49:21,122 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:49:21,124 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:49:21,139 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:49:21,214 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:49:35,152 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7450#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15| Int)) (and (not (= 2 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|)) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 8) 0) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15| 4)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 0) 16) (not (= |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 16) 0) (not (= 3 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 24) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 24) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 8) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 0) |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) (= 32 (select |#length| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~rval~1#1.base_BEFORE_CALL_15|) 16) 0))) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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)) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:49:35,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:49:35,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:49:35,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 7] total 28 [2022-11-20 19:49:35,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773586174] [2022-11-20 19:49:35,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:49:35,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 19:49:35,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 19:49:35,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2638, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 19:49:35,156 INFO L87 Difference]: Start difference. First operand 116 states and 147 transitions. Second operand has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 27 states have internal predecessors, (68), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-20 19:49:42,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:49:42,518 INFO L93 Difference]: Finished difference Result 215 states and 297 transitions. [2022-11-20 19:49:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 19:49:42,519 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 27 states have internal predecessors, (68), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) Word has length 59 [2022-11-20 19:49:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:49:42,521 INFO L225 Difference]: With dead ends: 215 [2022-11-20 19:49:42,521 INFO L226 Difference]: Without dead ends: 165 [2022-11-20 19:49:42,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 138 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=686, Invalid=6119, Unknown=1, NotChecked=0, Total=6806 [2022-11-20 19:49:42,524 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 114 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:49:42,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 513 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 770 Invalid, 0 Unknown, 115 Unchecked, 0.9s Time] [2022-11-20 19:49:42,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-20 19:49:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 116. [2022-11-20 19:49:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 77 states have internal predecessors, (85), 26 states have call successors, (26), 13 states have call predecessors, (26), 16 states have return successors, (33), 25 states have call predecessors, (33), 25 states have call successors, (33) [2022-11-20 19:49:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 144 transitions. [2022-11-20 19:49:42,590 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 144 transitions. Word has length 59 [2022-11-20 19:49:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:42,591 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 144 transitions. [2022-11-20 19:49:42,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 27 states have internal predecessors, (68), 12 states have call successors, (26), 4 states have call predecessors, (26), 8 states have return successors, (25), 10 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-20 19:49:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 144 transitions. [2022-11-20 19:49:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 19:49:42,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:42,593 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] [2022-11-20 19:49:42,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 19:49:42,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 19:49:42,799 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash 418573970, now seen corresponding path program 1 times [2022-11-20 19:49:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:42,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328283245] [2022-11-20 19:49:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 19:49:45,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:45,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328283245] [2022-11-20 19:49:45,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328283245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559004853] [2022-11-20 19:49:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:45,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:49:45,416 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:49:45,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 19:49:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:45,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-20 19:49:45,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:49:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:49:49,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:49:59,090 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-20 19:49:59,091 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 64 treesize of output 46 [2022-11-20 19:49:59,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559004853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:59,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339139600] [2022-11-20 19:49:59,375 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:49:59,376 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:49:59,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:49:59,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:49:59,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:49:59,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,538 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 19:49:59,538 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 [2022-11-20 19:49:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,702 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:49:59,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 19:49:59,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,953 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 [2022-11-20 19:49:59,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:59,992 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 [2022-11-20 19:50:00,027 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 [2022-11-20 19:50:00,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,062 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 [2022-11-20 19:50:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,134 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 [2022-11-20 19:50:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,191 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 [2022-11-20 19:50:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,250 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 [2022-11-20 19:50:00,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:00,303 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 [2022-11-20 19:50:09,752 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 153 for LOIs [2022-11-20 19:50:10,035 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 146 for LOIs [2022-11-20 19:50:11,395 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 19:50:11,444 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:50:11,462 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:50:11,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:50:55,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8350#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105| Int)) (and (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105| 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) (- 8))) 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) 1) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 2)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) (- 8))) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 3)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 4)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 8))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105| (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_102|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_105|) 8))))) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:50:55,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:50:55,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:50:55,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 42 [2022-11-20 19:50:55,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374676886] [2022-11-20 19:50:55,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:50:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 19:50:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:50:55,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 19:50:55,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=5566, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 19:50:55,642 INFO L87 Difference]: Start difference. First operand 116 states and 144 transitions. Second operand has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-20 19:51:06,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:06,628 INFO L93 Difference]: Finished difference Result 257 states and 375 transitions. [2022-11-20 19:51:06,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 19:51:06,629 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) Word has length 67 [2022-11-20 19:51:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:06,631 INFO L225 Difference]: With dead ends: 257 [2022-11-20 19:51:06,632 INFO L226 Difference]: Without dead ends: 210 [2022-11-20 19:51:06,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 89 SyntacticMatches, 10 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3419 ImplicationChecksByTransitivity, 57.5s TimeCoverageRelationStatistics Valid=810, Invalid=9902, Unknown=0, NotChecked=0, Total=10712 [2022-11-20 19:51:06,634 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 73 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 736 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:06,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 1316 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1207 Invalid, 0 Unknown, 736 Unchecked, 3.8s Time] [2022-11-20 19:51:06,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-20 19:51:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 172. [2022-11-20 19:51:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 109 states have (on average 1.165137614678899) internal successors, (127), 116 states have internal predecessors, (127), 39 states have call successors, (39), 18 states have call predecessors, (39), 23 states have return successors, (67), 37 states have call predecessors, (67), 38 states have call successors, (67) [2022-11-20 19:51:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 233 transitions. [2022-11-20 19:51:06,738 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 233 transitions. Word has length 67 [2022-11-20 19:51:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:06,738 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 233 transitions. [2022-11-20 19:51:06,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-20 19:51:06,739 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 233 transitions. [2022-11-20 19:51:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 19:51:06,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:06,740 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-11-20 19:51:06,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-20 19:51:06,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:06,947 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1931204807, now seen corresponding path program 1 times [2022-11-20 19:51:06,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:06,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022794301] [2022-11-20 19:51:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:06,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 19:51:08,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:51:08,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022794301] [2022-11-20 19:51:08,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022794301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:51:08,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400448977] [2022-11-20 19:51:08,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:08,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:08,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:51:08,222 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:51:08,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 19:51:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:08,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-20 19:51:08,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:10,907 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_75| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_75|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_75| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_75|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_78|) 0)))) is different from true [2022-11-20 19:51:12,804 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:51:12,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2022-11-20 19:51:12,825 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-20 19:51:12,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 1 [2022-11-20 19:51:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-20 19:51:12,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:51:14,577 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 19:51:14,577 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 [2022-11-20 19:51:14,600 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-20 19:51:14,600 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 [2022-11-20 19:51:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 19:51:14,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400448977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:51:14,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [32684] [2022-11-20 19:51:14,683 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:51:14,683 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:51:14,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:51:14,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:51:14,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:51:14,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:14,867 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:51:14,867 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 [2022-11-20 19:51:14,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:14,892 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 [2022-11-20 19:51:15,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,121 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 [2022-11-20 19:51:15,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,154 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 [2022-11-20 19:51:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,193 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 [2022-11-20 19:51:15,227 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 [2022-11-20 19:51:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,296 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 [2022-11-20 19:51:15,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,534 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:51:15,534 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 [2022-11-20 19:51:15,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:15,584 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 [2022-11-20 19:51:15,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,639 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 [2022-11-20 19:51:15,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,686 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 [2022-11-20 19:51:15,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,717 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 [2022-11-20 19:51:15,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:15,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:15,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:15,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:15,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:16,528 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-20 19:51:16,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-11-20 19:51:16,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:16,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:16,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:16,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:16,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:16,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:16,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:16,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:17,174 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-20 19:51:17,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 676 treesize of output 685 [2022-11-20 19:51:17,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:17,275 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-20 19:51:17,275 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 [2022-11-20 19:51:17,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:17,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:17,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-20 19:51:17,819 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-20 19:51:17,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 648 treesize of output 678 [2022-11-20 19:51:18,058 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-20 19:51:18,059 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 641 treesize of output 652 [2022-11-20 19:51:26,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:26,905 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 [2022-11-20 19:51:27,163 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 [2022-11-20 19:51:27,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:27,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:27,194 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 [2022-11-20 19:51:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:27,224 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 [2022-11-20 19:51:27,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:27,257 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 [2022-11-20 19:51:27,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:27,289 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 [2022-11-20 19:51:27,309 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 [2022-11-20 19:51:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:27,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:27,343 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 [2022-11-20 19:51:27,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:27,366 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 [2022-11-20 19:51:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:27,399 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 [2022-11-20 19:51:27,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:27,429 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 [2022-11-20 19:51:28,054 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-20 19:51:28,843 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-20 19:51:28,846 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:51:28,864 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:51:28,929 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:51:39,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [32684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:51:39,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:51:39,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [10, 17, 14] total 43 [2022-11-20 19:51:39,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855702382] [2022-11-20 19:51:39,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:51:39,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 19:51:39,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:51:39,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 19:51:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1551, Unknown=1, NotChecked=80, Total=1806 [2022-11-20 19:51:39,456 INFO L87 Difference]: Start difference. First operand 172 states and 233 transitions. Second operand has 20 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 19:51:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:42,781 INFO L93 Difference]: Finished difference Result 261 states and 351 transitions. [2022-11-20 19:51:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 19:51:42,782 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 4 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 70 [2022-11-20 19:51:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:42,783 INFO L225 Difference]: With dead ends: 261 [2022-11-20 19:51:42,783 INFO L226 Difference]: Without dead ends: 172 [2022-11-20 19:51:42,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 176 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=203, Invalid=1870, Unknown=1, NotChecked=88, Total=2162 [2022-11-20 19:51:42,785 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:42,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 179 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 343 Invalid, 0 Unknown, 96 Unchecked, 1.4s Time] [2022-11-20 19:51:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-20 19:51:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-11-20 19:51:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 116 states have internal predecessors, (126), 39 states have call successors, (39), 18 states have call predecessors, (39), 23 states have return successors, (67), 37 states have call predecessors, (67), 38 states have call successors, (67) [2022-11-20 19:51:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 232 transitions. [2022-11-20 19:51:42,907 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 232 transitions. Word has length 70 [2022-11-20 19:51:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:42,907 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 232 transitions. [2022-11-20 19:51:42,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-20 19:51:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 232 transitions. [2022-11-20 19:51:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-20 19:51:42,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:42,910 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] [2022-11-20 19:51:42,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:43,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 19:51:43,117 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:43,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1289991631, now seen corresponding path program 1 times [2022-11-20 19:51:43,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:43,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166550079] [2022-11-20 19:51:43,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:43,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-20 19:51:43,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:51:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166550079] [2022-11-20 19:51:43,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166550079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:51:43,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:51:43,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 19:51:43,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446404323] [2022-11-20 19:51:43,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:51:43,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:51:43,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:51:43,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:51:43,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:51:43,540 INFO L87 Difference]: Start difference. First operand 172 states and 232 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) [2022-11-20 19:51:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:44,145 INFO L93 Difference]: Finished difference Result 190 states and 260 transitions. [2022-11-20 19:51:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:51:44,146 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 [2022-11-20 19:51:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:44,148 INFO L225 Difference]: With dead ends: 190 [2022-11-20 19:51:44,149 INFO L226 Difference]: Without dead ends: 188 [2022-11-20 19:51:44,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-20 19:51:44,150 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:44,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 275 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:51:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-20 19:51:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2022-11-20 19:51:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 123 states have internal predecessors, (132), 41 states have call successors, (41), 19 states have call predecessors, (41), 25 states have return successors, (78), 39 states have call predecessors, (78), 40 states have call successors, (78) [2022-11-20 19:51:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 251 transitions. [2022-11-20 19:51:44,260 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 251 transitions. Word has length 70 [2022-11-20 19:51:44,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:44,260 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 251 transitions. [2022-11-20 19:51:44,261 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) [2022-11-20 19:51:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 251 transitions. [2022-11-20 19:51:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 19:51:44,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:44,263 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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] [2022-11-20 19:51:44,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 19:51:44,263 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash 637212922, now seen corresponding path program 1 times [2022-11-20 19:51:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:44,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102813089] [2022-11-20 19:51:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 19:51:44,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:51:44,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102813089] [2022-11-20 19:51:44,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102813089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:51:44,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109377422] [2022-11-20 19:51:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:44,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:44,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:51:44,711 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:51:44,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 19:51:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:45,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 19:51:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:45,426 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 19:51:45,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:45,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 19:51:45,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:45,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:45,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-20 19:51:45,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:45,550 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 16 treesize of output 20 [2022-11-20 19:51:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 43 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 19:51:46,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:51:47,391 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1469 (Array Int Int)) (v_ArrVal_1470 Int) (v_ArrVal_1471 (Array Int Int))) (not (= (+ |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset| 16) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1471) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1469) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_1470)) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.offset|)))) is different from false [2022-11-20 19:51:47,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:51:47,417 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-20 19:51:47,477 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:51:47,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 149 [2022-11-20 19:51:47,488 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 148 treesize of output 144 [2022-11-20 19:51:47,500 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 144 treesize of output 142 [2022-11-20 19:51:47,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 19:51:47,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:51:47,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 72 treesize of output 72 [2022-11-20 19:51:47,872 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 50 treesize of output 48 [2022-11-20 19:51:47,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2022-11-20 19:51:47,903 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 8 treesize of output 6 [2022-11-20 19:51:47,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 19:51:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 41 trivial. 1 not checked. [2022-11-20 19:51:48,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109377422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:51:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393404209] [2022-11-20 19:51:48,347 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:51:48,347 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:51:48,348 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:51:48,348 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:51:48,348 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:51:48,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,551 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:51:48,551 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 [2022-11-20 19:51:48,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,574 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 [2022-11-20 19:51:48,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,799 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 [2022-11-20 19:51:48,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,831 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 [2022-11-20 19:51:48,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,871 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 [2022-11-20 19:51:48,908 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 [2022-11-20 19:51:48,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:48,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:48,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:49,056 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:51:49,057 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 [2022-11-20 19:51:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:49,176 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:51:49,177 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 [2022-11-20 19:51:49,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,222 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 [2022-11-20 19:51:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,470 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:51:49,470 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 [2022-11-20 19:51:49,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,508 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 [2022-11-20 19:51:49,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,556 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 [2022-11-20 19:51:49,607 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 [2022-11-20 19:51:49,628 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 [2022-11-20 19:51:49,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:49,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,660 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 [2022-11-20 19:51:49,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-20 19:51:49,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-20 19:51:49,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,756 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 [2022-11-20 19:51:49,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,799 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 [2022-11-20 19:51:49,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,823 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 [2022-11-20 19:51:49,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,854 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 [2022-11-20 19:51:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:49,881 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 [2022-11-20 19:51:52,244 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-20 19:51:52,275 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-20 19:51:53,027 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:51:53,030 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:51:53,049 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:51:53,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:52:11,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11193#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_213| 16)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_213|))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:52:11,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:52:11,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:52:11,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 26 [2022-11-20 19:52:11,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036873072] [2022-11-20 19:52:11,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:52:11,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 19:52:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:52:11,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 19:52:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2448, Unknown=1, NotChecked=100, Total=2756 [2022-11-20 19:52:11,598 INFO L87 Difference]: Start difference. First operand 182 states and 251 transitions. Second operand has 26 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 25 states have internal predecessors, (81), 10 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) [2022-11-20 19:52:16,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:52:16,702 INFO L93 Difference]: Finished difference Result 327 states and 447 transitions. [2022-11-20 19:52:16,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 19:52:16,703 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 25 states have internal predecessors, (81), 10 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) Word has length 73 [2022-11-20 19:52:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:52:16,705 INFO L225 Difference]: With dead ends: 327 [2022-11-20 19:52:16,705 INFO L226 Difference]: Without dead ends: 195 [2022-11-20 19:52:16,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=370, Invalid=4603, Unknown=1, NotChecked=138, Total=5112 [2022-11-20 19:52:16,708 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 86 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:52:16,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 573 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 798 Invalid, 0 Unknown, 282 Unchecked, 2.6s Time] [2022-11-20 19:52:16,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-20 19:52:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2022-11-20 19:52:16,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 128 states have internal predecessors, (138), 43 states have call successors, (43), 21 states have call predecessors, (43), 25 states have return successors, (67), 41 states have call predecessors, (67), 42 states have call successors, (67) [2022-11-20 19:52:16,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 248 transitions. [2022-11-20 19:52:16,894 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 248 transitions. Word has length 73 [2022-11-20 19:52:16,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:52:16,894 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 248 transitions. [2022-11-20 19:52:16,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 25 states have internal predecessors, (81), 10 states have call successors, (26), 3 states have call predecessors, (26), 7 states have return successors, (25), 8 states have call predecessors, (25), 10 states have call successors, (25) [2022-11-20 19:52:16,895 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 248 transitions. [2022-11-20 19:52:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 19:52:16,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:52:16,896 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] [2022-11-20 19:52:16,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 19:52:17,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 19:52:17,097 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:52:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:52:17,098 INFO L85 PathProgramCache]: Analyzing trace with hash -358000847, now seen corresponding path program 2 times [2022-11-20 19:52:17,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:52:17,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037863927] [2022-11-20 19:52:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:52:17,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:52:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:52:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 19:52:19,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:52:19,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037863927] [2022-11-20 19:52:19,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037863927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:52:19,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122697670] [2022-11-20 19:52:19,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:52:19,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:52:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:52:19,733 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:52:19,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 19:52:20,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:52:20,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:52:20,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 19:52:20,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:52:46,679 WARN L233 SmtUtils]: Spent 10.06s 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) [2022-11-20 19:52:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 19:52:47,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:49,216 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:49,217 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 26 treesize of output 29 [2022-11-20 19:52:49,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:49,268 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 27 [2022-11-20 19:52:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 19:52:49,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122697670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:52:49,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [530023859] [2022-11-20 19:52:49,566 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:52:49,566 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:52:49,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:52:49,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:52:49,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:52:49,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:49,746 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 19:52:49,747 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 [2022-11-20 19:52:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:49,934 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:52:49,934 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 [2022-11-20 19:52:50,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,178 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 [2022-11-20 19:52:50,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,213 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 [2022-11-20 19:52:50,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,256 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 [2022-11-20 19:52:50,290 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 [2022-11-20 19:52:50,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,350 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 [2022-11-20 19:52:50,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,393 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 [2022-11-20 19:52:50,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,439 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 [2022-11-20 19:52:50,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:52:50,476 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 [2022-11-20 19:53:00,017 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 153 for LOIs [2022-11-20 19:53:00,259 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-20 19:53:00,959 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 19:53:01,002 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:53:01,021 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:53:01,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:53:39,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12495#(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$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$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$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (<= 0 |#NULL.offset|) (= 30 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (- 8))) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) 0) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) 32) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (not (= 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (- 8))) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|) 0)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) 1) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|)) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143| 0) (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|))) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_140|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_143|))))) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 19:53:39,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:53:39,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:53:39,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 13] total 35 [2022-11-20 19:53:39,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388016030] [2022-11-20 19:53:39,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:53:39,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 19:53:39,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:53:39,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 19:53:39,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=3516, Unknown=7, NotChecked=0, Total=3906 [2022-11-20 19:53:39,641 INFO L87 Difference]: Start difference. First operand 191 states and 248 transitions. Second operand has 35 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-20 19:54:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:54:04,770 INFO L93 Difference]: Finished difference Result 378 states and 533 transitions. [2022-11-20 19:54:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 19:54:04,771 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) Word has length 73 [2022-11-20 19:54:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:54:04,773 INFO L225 Difference]: With dead ends: 378 [2022-11-20 19:54:04,773 INFO L226 Difference]: Without dead ends: 277 [2022-11-20 19:54:04,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 183 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 87.2s TimeCoverageRelationStatistics Valid=678, Invalid=6446, Unknown=16, NotChecked=0, Total=7140 [2022-11-20 19:54:04,776 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 217 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 2169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 656 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:54:04,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1288 Invalid, 2169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1355 Invalid, 0 Unknown, 656 Unchecked, 4.2s Time] [2022-11-20 19:54:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-11-20 19:54:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 237. [2022-11-20 19:54:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 163 states have internal predecessors, (173), 47 states have call successors, (47), 28 states have call predecessors, (47), 34 states have return successors, (73), 45 states have call predecessors, (73), 46 states have call successors, (73) [2022-11-20 19:54:04,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 293 transitions. [2022-11-20 19:54:04,914 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 293 transitions. Word has length 73 [2022-11-20 19:54:04,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:54:04,915 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 293 transitions. [2022-11-20 19:54:04,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-20 19:54:04,915 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 293 transitions. [2022-11-20 19:54:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 19:54:04,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:54:04,916 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, 1] [2022-11-20 19:54:04,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 19:54:05,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 19:54:05,119 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:54:05,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:54:05,119 INFO L85 PathProgramCache]: Analyzing trace with hash 683217571, now seen corresponding path program 1 times [2022-11-20 19:54:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:54:05,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534399185] [2022-11-20 19:54:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:54:05,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:54:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:54:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 19:54:07,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:54:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534399185] [2022-11-20 19:54:07,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534399185] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:54:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375269190] [2022-11-20 19:54:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:54:07,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:54:07,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:54:07,023 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:54:07,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 19:54:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:54:07,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 19:54:07,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:54:10,010 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113| Int)) (not (= (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113| 16) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113| Int)) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113|))))) is different from true [2022-11-20 19:54:12,362 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 0) |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_harness_~#list~0#1.base_BEFORE_CALL_298|) 0))))) is different from true [2022-11-20 19:54:14,669 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114|) 0) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114|)))) is different from true [2022-11-20 19:54:24,845 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:54:39,040 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:54:49,257 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:54:59,623 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:55:07,838 WARN L233 SmtUtils]: Spent 8.05s 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) [2022-11-20 19:55:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 53 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-20 19:55:07,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:55:11,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:55:11,881 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 28 treesize of output 31 [2022-11-20 19:55:11,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:55:11,918 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 22 treesize of output 25 [2022-11-20 19:55:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 19:55:12,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375269190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:55:12,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [491196366] [2022-11-20 19:55:12,127 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:55:12,127 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:55:12,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:55:12,128 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:55:12,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:55:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,344 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 19:55:12,345 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 [2022-11-20 19:55:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,513 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:55:12,513 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 [2022-11-20 19:55:12,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,732 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 [2022-11-20 19:55:12,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,768 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 [2022-11-20 19:55:12,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,820 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 [2022-11-20 19:55:12,852 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 [2022-11-20 19:55:12,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:12,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:55:13,003 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:55:13,004 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 [2022-11-20 19:55:13,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,243 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:55:13,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-20 19:55:13,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,279 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 [2022-11-20 19:55:13,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,317 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 [2022-11-20 19:55:13,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,351 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 [2022-11-20 19:55:13,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:55:13,398 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 [2022-11-20 19:55:13,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:55:13,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,478 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 [2022-11-20 19:55:13,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,506 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 [2022-11-20 19:55:13,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,538 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 [2022-11-20 19:55:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,567 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 [2022-11-20 19:55:13,583 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 [2022-11-20 19:55:13,598 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 [2022-11-20 19:55:13,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,645 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 [2022-11-20 19:55:13,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,676 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 [2022-11-20 19:55:13,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,704 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 [2022-11-20 19:55:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:55:13,732 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 29 treesize of output 17 [2022-11-20 19:55:15,069 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-20 19:55:15,085 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 59 for LOIs [2022-11-20 19:55:16,282 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:55:16,285 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:55:16,303 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:55:16,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:55:34,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13970#(and (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:55:34,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:55:34,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:55:34,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 14] total 35 [2022-11-20 19:55:34,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854753531] [2022-11-20 19:55:34,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:55:34,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 19:55:34,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:55:34,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 19:55:34,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3170, Unknown=10, NotChecked=348, Total=3782 [2022-11-20 19:55:34,645 INFO L87 Difference]: Start difference. First operand 237 states and 293 transitions. Second operand has 35 states, 32 states have (on average 3.125) internal successors, (100), 33 states have internal predecessors, (100), 16 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-20 19:56:52,886 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:57:09,081 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:57:23,232 WARN L233 SmtUtils]: Spent 8.07s 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) [2022-11-20 19:57:33,380 WARN L233 SmtUtils]: Spent 8.08s 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) [2022-11-20 19:57:35,390 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113| Int)) (not (= (+ |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113| 16) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110| Int) (|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113| Int)) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110| (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_110|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_113|))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114|) 0) |v_ULTIMATE.start_aws_linked_list_end_~list#1.base_BEFORE_CALL_114|))))) is different from true [2022-11-20 19:57:47,531 WARN L233 SmtUtils]: Spent 8.08s 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) [2022-11-20 19:57:59,728 WARN L233 SmtUtils]: Spent 8.07s 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) [2022-11-20 19:58:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:58:02,764 INFO L93 Difference]: Finished difference Result 380 states and 473 transitions. [2022-11-20 19:58:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 19:58:02,764 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.125) internal successors, (100), 33 states have internal predecessors, (100), 16 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) Word has length 74 [2022-11-20 19:58:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:58:02,766 INFO L225 Difference]: With dead ends: 380 [2022-11-20 19:58:02,767 INFO L226 Difference]: Without dead ends: 253 [2022-11-20 19:58:02,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 169 SyntacticMatches, 16 SemanticMatches, 86 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2398 ImplicationChecksByTransitivity, 224.9s TimeCoverageRelationStatistics Valid=528, Invalid=6404, Unknown=56, NotChecked=668, Total=7656 [2022-11-20 19:58:02,769 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 179 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 745 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:58:02,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 800 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1491 Invalid, 0 Unknown, 745 Unchecked, 4.5s Time] [2022-11-20 19:58:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-20 19:58:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 196. [2022-11-20 19:58:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 130 states have (on average 1.1076923076923078) internal successors, (144), 135 states have internal predecessors, (144), 37 states have call successors, (37), 25 states have call predecessors, (37), 28 states have return successors, (48), 35 states have call predecessors, (48), 36 states have call successors, (48) [2022-11-20 19:58:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 229 transitions. [2022-11-20 19:58:02,881 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 229 transitions. Word has length 74 [2022-11-20 19:58:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:58:02,881 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 229 transitions. [2022-11-20 19:58:02,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.125) internal successors, (100), 33 states have internal predecessors, (100), 16 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (28), 12 states have call predecessors, (28), 16 states have call successors, (28) [2022-11-20 19:58:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 229 transitions. [2022-11-20 19:58:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 19:58:02,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:58:02,883 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 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] [2022-11-20 19:58:02,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 19:58:03,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:58:03,090 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:58:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:58:03,091 INFO L85 PathProgramCache]: Analyzing trace with hash -841274089, now seen corresponding path program 1 times [2022-11-20 19:58:03,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:58:03,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394817793] [2022-11-20 19:58:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:58:03,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:58:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:58:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 19:58:05,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:58:05,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394817793] [2022-11-20 19:58:05,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394817793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:58:05,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478726439] [2022-11-20 19:58:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:58:05,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:58:05,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:58:05,230 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:58:05,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d99a51-115c-4893-a89c-5bf891c2fdec/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 19:58:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:58:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-20 19:58:05,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:58:34,725 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) [2022-11-20 19:58:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 44 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 19:58:37,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:58:39,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:58:39,703 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 26 treesize of output 29 [2022-11-20 19:58:39,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:58:39,742 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 27 [2022-11-20 19:58:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 19:58:39,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478726439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:58:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1318289657] [2022-11-20 19:58:39,978 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:58:39,978 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:58:39,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:58:39,979 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:58:39,979 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:58:40,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,164 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 19:58:40,165 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 [2022-11-20 19:58:40,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,341 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:58:40,342 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 [2022-11-20 19:58:40,555 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 [2022-11-20 19:58:40,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,582 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 [2022-11-20 19:58:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,615 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 [2022-11-20 19:58:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,654 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 [2022-11-20 19:58:40,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,708 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 [2022-11-20 19:58:40,738 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 [2022-11-20 19:58:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,770 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 [2022-11-20 19:58:40,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:40,821 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 [2022-11-20 19:58:50,152 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 142 for LOIs [2022-11-20 19:58:50,358 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-20 19:58:51,110 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-20 19:58:51,150 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-20 19:58:51,170 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:58:51,232 INFO L180 IcfgInterpreter]: Interpretation finished