./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7 --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 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:38:12,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:38:12,308 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:38:12,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:38:12,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:38:12,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:38:12,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:38:12,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:38:12,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:38:12,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:38:12,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:38:12,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:38:12,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:38:12,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:38:12,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:38:12,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:38:12,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:38:12,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:38:12,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:38:12,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:38:12,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:38:12,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:38:12,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:38:12,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:38:12,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:38:12,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:38:12,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:38:12,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:38:12,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:38:12,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:38:12,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:38:12,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:38:12,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:38:12,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:38:12,408 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:38:12,408 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:38:12,409 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:38:12,409 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:38:12,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:38:12,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:38:12,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:38:12,412 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:38:12,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:38:12,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:38:12,464 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:38:12,464 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:38:12,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:38:12,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:38:12,472 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:38:12,473 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:38:12,473 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:38:12,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:38:12,474 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:38:12,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:38:12,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:38:12,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:38:12,475 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:38:12,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:38:12,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:38:12,476 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:38:12,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:38:12,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:38:12,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:38:12,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:38:12,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:38:12,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:38:12,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:38:12,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:38:12,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:38:12,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:38:12,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:38:12,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:38:12,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:38:12,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:38:12,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:38:12,483 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:38:12,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:38:12,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:38:12,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:38:12,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:38:12,484 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2021-11-25 19:38:12,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:38:12,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:38:12,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:38:12,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:38:12,813 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:38:12,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-11-25 19:38:12,893 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/data/5989ef4e1/cf2b5e8cc85d43e69a5fe48eb4c28533/FLAG502bd814b [2021-11-25 19:38:13,677 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:38:13,679 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-11-25 19:38:13,740 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/data/5989ef4e1/cf2b5e8cc85d43e69a5fe48eb4c28533/FLAG502bd814b [2021-11-25 19:38:14,203 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/data/5989ef4e1/cf2b5e8cc85d43e69a5fe48eb4c28533 [2021-11-25 19:38:14,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:38:14,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:38:14,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:38:14,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:38:14,220 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:38:14,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:38:14" (1/1) ... [2021-11-25 19:38:14,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e7a8b06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:14, skipping insertion in model container [2021-11-25 19:38:14,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:38:14" (1/1) ... [2021-11-25 19:38:14,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:38:14,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:38:14,609 WARN L230 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_b79a550e-a604-4435-9f2e-78992f800546/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-11-25 19:38:14,618 WARN L230 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_b79a550e-a604-4435-9f2e-78992f800546/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-11-25 19:38:15,623 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,624 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,624 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,625 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,626 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,645 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,656 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,658 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,658 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,660 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,661 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,662 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,662 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:15,991 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 19:38:15,992 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 19:38:15,993 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 19:38:15,995 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 19:38:15,996 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 19:38:15,997 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 19:38:15,997 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 19:38:15,998 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 19:38:15,999 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 19:38:15,999 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 19:38:16,131 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 19:38:16,156 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:38:16,186 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:38:16,200 WARN L230 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_b79a550e-a604-4435-9f2e-78992f800546/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-11-25 19:38:16,200 WARN L230 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_b79a550e-a604-4435-9f2e-78992f800546/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-11-25 19:38:16,258 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,258 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,259 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,259 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,260 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,268 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,268 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,269 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,270 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,271 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,272 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,272 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,272 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:38:16,307 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 19:38:16,308 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 19:38:16,309 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 19:38:16,310 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 19:38:16,311 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 19:38:16,311 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 19:38:16,312 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 19:38:16,312 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 19:38:16,313 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 19:38:16,313 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 19:38:16,335 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 19:38:16,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:38:16,603 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:38:16,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16 WrapperNode [2021-11-25 19:38:16,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:38:16,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:38:16,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:38:16,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:38:16,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,727 INFO L137 Inliner]: procedures = 679, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 29 [2021-11-25 19:38:16,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:38:16,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:38:16,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:38:16,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:38:16,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:38:16,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:38:16,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:38:16,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:38:16,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (1/1) ... [2021-11-25 19:38:16,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:38:16,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:16,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:38:16,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:38:16,861 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2021-11-25 19:38:16,861 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2021-11-25 19:38:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-25 19:38:16,862 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-25 19:38:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:38:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:38:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 19:38:16,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 19:38:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:38:16,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:38:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:38:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 19:38:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 19:38:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:38:16,863 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:38:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:38:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:38:16,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:38:17,038 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:38:17,039 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:38:17,193 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:38:17,230 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:38:17,231 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:38:17,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:38:17 BoogieIcfgContainer [2021-11-25 19:38:17,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:38:17,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:38:17,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:38:17,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:38:17,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:38:14" (1/3) ... [2021-11-25 19:38:17,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cfb841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:38:17, skipping insertion in model container [2021-11-25 19:38:17,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:16" (2/3) ... [2021-11-25 19:38:17,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60cfb841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:38:17, skipping insertion in model container [2021-11-25 19:38:17,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:38:17" (3/3) ... [2021-11-25 19:38:17,241 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2021-11-25 19:38:17,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:38:17,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:38:17,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:38:17,317 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:38:17,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:38:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 19:38:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:38:17,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:17,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:17,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash 325938203, now seen corresponding path program 1 times [2021-11-25 19:38:17,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:17,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996311753] [2021-11-25 19:38:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:17,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:17,683 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:17,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996311753] [2021-11-25 19:38:17,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996311753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:17,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:17,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:38:17,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20762297] [2021-11-25 19:38:17,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:17,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:38:17,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:38:17,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:38:17,722 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:38:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:17,759 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-11-25 19:38:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:38:17,762 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-25 19:38:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:17,769 INFO L225 Difference]: With dead ends: 56 [2021-11-25 19:38:17,770 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 19:38:17,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:38:17,777 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:17,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:38:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 19:38:17,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 19:38:17,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 19:38:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-25 19:38:17,833 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2021-11-25 19:38:17,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:17,834 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-25 19:38:17,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:38:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-25 19:38:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-25 19:38:17,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:17,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:17,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:38:17,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:17,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash -805366998, now seen corresponding path program 1 times [2021-11-25 19:38:17,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:17,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564776383] [2021-11-25 19:38:17,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:17,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:18,086 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:18,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564776383] [2021-11-25 19:38:18,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564776383] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:18,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:18,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:38:18,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570032321] [2021-11-25 19:38:18,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:18,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:38:18,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:18,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:38:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:38:18,098 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:38:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:18,193 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-25 19:38:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:38:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-25 19:38:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:18,198 INFO L225 Difference]: With dead ends: 39 [2021-11-25 19:38:18,198 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:38:18,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:38:18,202 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:18,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:38:18,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:38:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-11-25 19:38:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-25 19:38:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-25 19:38:18,230 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-11-25 19:38:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:18,232 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-25 19:38:18,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 19:38:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-25 19:38:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:38:18,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:18,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:18,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:38:18,236 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:18,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:18,238 INFO L85 PathProgramCache]: Analyzing trace with hash 989415369, now seen corresponding path program 1 times [2021-11-25 19:38:18,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:18,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964454792] [2021-11-25 19:38:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:18,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:18,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:18,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964454792] [2021-11-25 19:38:18,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964454792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:18,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:18,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:38:18,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977782474] [2021-11-25 19:38:18,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:18,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:38:18,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:38:18,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:38:18,487 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:38:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:18,547 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-25 19:38:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:38:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-11-25 19:38:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:18,550 INFO L225 Difference]: With dead ends: 64 [2021-11-25 19:38:18,551 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:38:18,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:38:18,555 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:18,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:38:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:38:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-25 19:38:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-25 19:38:18,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-25 19:38:18,562 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2021-11-25 19:38:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:18,563 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-25 19:38:18,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 19:38:18,563 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-25 19:38:18,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:38:18,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:18,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:18,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:38:18,565 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash -518460441, now seen corresponding path program 1 times [2021-11-25 19:38:18,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:18,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184430393] [2021-11-25 19:38:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:18,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:18,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:18,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184430393] [2021-11-25 19:38:18,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184430393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:38:18,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268338582] [2021-11-25 19:38:18,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:18,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:18,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:18,708 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:18,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:38:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 19:38:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:18,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:38:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:19,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:19,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 12 [2021-11-25 19:38:19,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 24 [2021-11-25 19:38:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:19,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268338582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:38:19,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915319410] [2021-11-25 19:38:19,756 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:38:19,756 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:19,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:19,766 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:19,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:19,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:19,895 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-25 19:38:19,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-25 19:38:19,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,000 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:38:20,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:38:20,062 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2021-11-25 19:38:20,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:38:20,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:38:20,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:38:20,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:38:20,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:20,509 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-25 19:38:20,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 57 treesize of output 60 [2021-11-25 19:38:20,538 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 19:38:20,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 51 treesize of output 54 [2021-11-25 19:38:20,566 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-25 19:38:20,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 47 treesize of output 50 [2021-11-25 19:38:20,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:20,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:20,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:38:20,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:20,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:20,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:21,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:21,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:21,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:21,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:21,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:21,352 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 82 for LOIs [2021-11-25 19:38:21,426 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2021-11-25 19:38:21,460 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2021-11-25 19:38:21,512 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 133 for LOIs [2021-11-25 19:38:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:22,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:22,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:22,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:38:22,386 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:38:26,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '575#(and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| Int)) (and (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 2)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 5)) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 0)) 1 0) 0) 0 1) 256) 0)) (= 16 (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 4)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 0)) (not (= (mod (select (select |#memory_int| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 0) 256) 0)) (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) 1) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7|) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_7| 3)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:38:26,238 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:38:26,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:38:26,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 8] total 17 [2021-11-25 19:38:26,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935045163] [2021-11-25 19:38:26,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:38:26,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:38:26,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:38:26,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 19:38:26,242 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:38:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:26,432 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-11-25 19:38:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:38:26,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 23 [2021-11-25 19:38:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:26,434 INFO L225 Difference]: With dead ends: 74 [2021-11-25 19:38:26,434 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 19:38:26,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:38:26,436 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:26,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 223 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-11-25 19:38:26,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 19:38:26,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-25 19:38:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.25) internal successors, (35), 30 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-25 19:38:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-11-25 19:38:26,446 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 23 [2021-11-25 19:38:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:26,447 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-11-25 19:38:26,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:38:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-11-25 19:38:26,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:38:26,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:26,448 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:26,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:26,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:26,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:26,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1249058711, now seen corresponding path program 1 times [2021-11-25 19:38:26,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:26,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260594678] [2021-11-25 19:38:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:26,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:26,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:26,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260594678] [2021-11-25 19:38:26,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260594678] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:38:26,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846411857] [2021-11-25 19:38:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:26,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:26,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:26,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:26,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:38:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-25 19:38:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:27,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:38:27,050 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 19:38:27,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 19:38:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:27,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:28,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 20 [2021-11-25 19:38:28,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 80 treesize of output 76 [2021-11-25 19:38:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:28,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846411857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:38:28,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1213958379] [2021-11-25 19:38:28,206 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:38:28,206 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:28,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:28,207 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:28,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,279 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-25 19:38:28,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-25 19:38:28,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,355 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:38:28,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:38:28,419 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2021-11-25 19:38:28,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:28,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:38:28,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:28,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:28,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:28,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 70 treesize of output 69 [2021-11-25 19:38:28,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:38:28,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:38:28,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:28,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:38:28,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:28,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:28,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:28,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:29,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:29,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:29,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2021-11-25 19:38:29,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 433 [2021-11-25 19:38:29,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 433 treesize of output 417 [2021-11-25 19:38:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:29,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:29,851 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2021-11-25 19:38:30,237 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2021-11-25 19:38:30,273 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2021-11-25 19:38:30,440 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2021-11-25 19:38:31,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:31,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:31,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:31,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:38:31,101 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:38:35,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '938#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 Int)) (and (<= 0 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (or (and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) 16) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23)) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 0)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (not (= (mod (ite (= 0 (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 0)) 1 0)) 0 1) 256) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 4)) (= (select |#valid| 0) 0) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) 1) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_3 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3_67 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_3 Int)) (and (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_3) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_3 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3_67 18446744073709551616))))) 256) 0)) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3_67 18446744073709551615) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_3_67))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 3)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 2))) (and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) 16) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23)) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 0)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (not (= (mod (ite (= 0 (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 0)) 1 0)) 0 1) 256) 0)) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4 Int)) (and (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_4) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_4 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551616))))) 256) 0)) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_4_67 18446744073709551615))) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 4)) (= (select |#valid| 0) 0) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) 1) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 3)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_23 2)))))))' at error location [2021-11-25 19:38:35,755 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:38:35,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:38:35,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 10] total 22 [2021-11-25 19:38:35,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745245803] [2021-11-25 19:38:35,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:38:35,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:38:35,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:38:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:38:35,758 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:38:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:36,044 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2021-11-25 19:38:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 19:38:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 26 [2021-11-25 19:38:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:36,047 INFO L225 Difference]: With dead ends: 88 [2021-11-25 19:38:36,047 INFO L226 Difference]: Without dead ends: 52 [2021-11-25 19:38:36,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=127, Invalid=1513, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 19:38:36,049 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:36,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 290 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 129 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2021-11-25 19:38:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-25 19:38:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-11-25 19:38:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-25 19:38:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-25 19:38:36,067 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 26 [2021-11-25 19:38:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:36,067 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-25 19:38:36,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:38:36,068 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-25 19:38:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:38:36,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:36,069 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:36,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:36,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:36,280 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:36,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:36,280 INFO L85 PathProgramCache]: Analyzing trace with hash -842842685, now seen corresponding path program 2 times [2021-11-25 19:38:36,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:36,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53046974] [2021-11-25 19:38:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:36,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:38:36,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53046974] [2021-11-25 19:38:36,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53046974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:38:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450503866] [2021-11-25 19:38:36,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:38:36,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:36,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:36,506 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:36,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:38:36,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:38:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:38:36,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-25 19:38:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:36,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:38:36,893 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-25 19:38:36,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 22 treesize of output 21 [2021-11-25 19:38:36,936 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-25 19:38:36,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 19:38:37,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:37,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:39,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 57 treesize of output 53 [2021-11-25 19:38:39,411 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 19:38:39,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 361 treesize of output 353 [2021-11-25 19:38:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:39,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450503866] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:38:39,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1664977322] [2021-11-25 19:38:39,547 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:38:39,547 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:39,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:39,548 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:39,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:39,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:39,640 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:38:39,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:38:39,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:39,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2021-11-25 19:38:39,686 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2021-11-25 19:38:39,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:39,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:38:39,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:39,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:39,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:39,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:39,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:38:39,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:39,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:38:39,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:39,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 70 treesize of output 69 [2021-11-25 19:38:40,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:40,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:38:40,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:40,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:40,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:40,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:40,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2021-11-25 19:38:40,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 489 treesize of output 473 [2021-11-25 19:38:40,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 473 treesize of output 417 [2021-11-25 19:38:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:40,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:40,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:38:40,992 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2021-11-25 19:38:41,347 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2021-11-25 19:38:41,373 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 76 for LOIs [2021-11-25 19:38:41,543 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2021-11-25 19:38:42,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:42,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:38:42,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:42,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:38:42,151 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:38:46,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 Int)) (and (or (and (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 3)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 0)) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 2)) (= |__VERIFIER_assert_#in~cond| 0) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_5 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5_67 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_5 Int)) (and (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_5) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_5 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5_67 18446744073709551616))))) 256) 0)) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5_67) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_5_67 18446744073709551615))) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (not (= 0 (mod (ite (= (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 0)) 1 0) 0) 0 1) 256))) (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) 16) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 4)) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36))) (and (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 3)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 0)) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 18446744073709551615) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_6) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_6 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 18446744073709551616) (+ (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_6_67 18446744073709551616) (- 18446744073709551616))))) 256) 0)))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 2)) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (not (= 0 (mod (ite (= (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 0)) 1 0) 0) 0 1) 256))) (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) 16) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36 4)) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36) 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36)))) (<= 0 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_36))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))' at error location [2021-11-25 19:38:46,882 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:38:46,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:38:46,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14, 13] total 29 [2021-11-25 19:38:46,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076176021] [2021-11-25 19:38:46,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:38:46,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 19:38:46,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:46,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 19:38:46,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1925, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:38:46,886 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:38:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:47,538 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2021-11-25 19:38:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:38:47,539 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 29 [2021-11-25 19:38:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:47,540 INFO L225 Difference]: With dead ends: 97 [2021-11-25 19:38:47,540 INFO L226 Difference]: Without dead ends: 57 [2021-11-25 19:38:47,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=177, Invalid=2273, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 19:38:47,542 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:47,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 301 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 204 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2021-11-25 19:38:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-25 19:38:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2021-11-25 19:38:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 40 states have internal predecessors, (51), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-25 19:38:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-11-25 19:38:47,553 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 29 [2021-11-25 19:38:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:47,553 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-11-25 19:38:47,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 28 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:38:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-11-25 19:38:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 19:38:47,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:47,555 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:47,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:47,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:38:47,771 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:47,771 INFO L85 PathProgramCache]: Analyzing trace with hash 864618739, now seen corresponding path program 3 times [2021-11-25 19:38:47,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:47,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840079481] [2021-11-25 19:38:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:47,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:47,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:38:48,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:48,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840079481] [2021-11-25 19:38:48,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840079481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:38:48,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437030067] [2021-11-25 19:38:48,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:38:48,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:48,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:48,014 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:48,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:38:48,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:38:48,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:38:48,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-25 19:38:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:48,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:38:48,332 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-25 19:38:48,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 22 treesize of output 21 [2021-11-25 19:38:48,380 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 19:38:48,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 19:38:48,440 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 19:38:48,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 19:38:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:38:49,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:50,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 67 treesize of output 63 [2021-11-25 19:38:50,808 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 19:38:50,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 17659 treesize of output 17499 [2021-11-25 19:40:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:06,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437030067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:40:06,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70234959] [2021-11-25 19:40:06,024 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:40:06,025 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:40:06,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:40:06,025 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:40:06,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:40:06,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,105 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:40:06,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:40:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2021-11-25 19:40:06,148 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2021-11-25 19:40:06,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:06,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:06,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:06,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:40:06,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:06,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 70 treesize of output 69 [2021-11-25 19:40:06,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:40:06,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:40:06,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:06,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:06,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:40:06,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:06,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:06,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:06,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:06,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2021-11-25 19:40:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:06,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 433 [2021-11-25 19:40:06,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 433 treesize of output 417 [2021-11-25 19:40:07,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:07,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:07,257 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2021-11-25 19:40:07,530 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2021-11-25 19:40:07,553 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 76 for LOIs [2021-11-25 19:40:07,681 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2021-11-25 19:40:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:08,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:08,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:08,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:40:08,190 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:40:12,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1822#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 Int)) (and (<= 0 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49) (or (and (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 2)) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_7 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7_67 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_7 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7_67) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_7) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_7 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7_67 18446744073709551616))))) 256) 0)) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_7_67 18446744073709551615))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49)) (= 37 (select |#length| 2)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 3)) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 4)) (= (select |#valid| 1) 1) (not (= (mod (ite (= (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 0)) 1 0) 0) 0 1) 256) 0)) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49) 1) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 0)) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 16 (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 2)) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 18446744073709551615) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_8) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_8 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_8_67 18446744073709551616))))) 256) 0)))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49)) (= 37 (select |#length| 2)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 3)) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 4)) (= (select |#valid| 1) 1) (not (= (mod (ite (= (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 0)) 1 0) 0) 0 1) 256) 0)) (= (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49) 1) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49 0)) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (= 16 (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_49)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))))))' at error location [2021-11-25 19:40:12,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:40:12,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:40:12,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 19, 15] total 37 [2021-11-25 19:40:12,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615793894] [2021-11-25 19:40:12,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:40:12,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 19:40:12,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:12,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 19:40:12,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2685, Unknown=0, NotChecked=0, Total=2862 [2021-11-25 19:40:12,788 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 37 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 35 states have internal predecessors, (56), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:40:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:14,073 INFO L93 Difference]: Finished difference Result 123 states and 168 transitions. [2021-11-25 19:40:14,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:40:14,074 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 35 states have internal predecessors, (56), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2021-11-25 19:40:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:14,077 INFO L225 Difference]: With dead ends: 123 [2021-11-25 19:40:14,077 INFO L226 Difference]: Without dead ends: 81 [2021-11-25 19:40:14,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=214, Invalid=3326, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 19:40:14,079 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:14,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 554 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 622 Invalid, 0 Unknown, 207 Unchecked, 0.9s Time] [2021-11-25 19:40:14,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-25 19:40:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2021-11-25 19:40:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 51 states have internal predecessors, (65), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-25 19:40:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2021-11-25 19:40:14,098 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 32 [2021-11-25 19:40:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:14,098 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2021-11-25 19:40:14,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 35 states have internal predecessors, (56), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-25 19:40:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2021-11-25 19:40:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 19:40:14,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:14,100 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:14,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:40:14,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:14,303 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:14,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1232854195, now seen corresponding path program 4 times [2021-11-25 19:40:14,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:14,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354992976] [2021-11-25 19:40:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:14,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:40:14,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354992976] [2021-11-25 19:40:14,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354992976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:40:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679651239] [2021-11-25 19:40:14,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:40:14,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:14,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:14,590 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:14,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:40:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:14,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-25 19:40:14,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:14,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:40:14,853 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-25 19:40:14,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 22 treesize of output 21 [2021-11-25 19:40:14,903 INFO L354 Elim1Store]: treesize reduction 64, result has 22.0 percent of original size [2021-11-25 19:40:14,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 19:40:14,971 INFO L354 Elim1Store]: treesize reduction 120, result has 18.9 percent of original size [2021-11-25 19:40:14,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 47 [2021-11-25 19:40:15,054 INFO L354 Elim1Store]: treesize reduction 190, result has 16.7 percent of original size [2021-11-25 19:40:15,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 60 [2021-11-25 19:40:15,167 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-25 19:40:15,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-25 19:40:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:15,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:40:17,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 44 [2021-11-25 19:40:17,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6392 treesize of output 6376 [2021-11-25 19:40:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:26,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679651239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:40:26,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1193953257] [2021-11-25 19:40:26,492 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:40:26,492 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:40:26,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:40:26,493 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:40:26,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:40:26,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,578 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:40:26,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:40:26,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 16 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 [2021-11-25 19:40:26,621 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2021-11-25 19:40:26,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:26,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:26,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:26,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:40:26,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:40:26,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 70 treesize of output 69 [2021-11-25 19:40:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:40:26,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:26,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:26,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:40:26,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:26,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:26,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:26,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:26,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:27,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:27,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2021-11-25 19:40:27,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 489 treesize of output 433 [2021-11-25 19:40:27,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 433 treesize of output 417 [2021-11-25 19:40:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:27,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:27,539 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2021-11-25 19:40:27,787 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2021-11-25 19:40:27,809 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2021-11-25 19:40:27,940 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2021-11-25 19:40:28,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:28,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:28,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:40:28,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:28,421 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:40:35,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2362#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| Int)) (and (or (and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 4)) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 1) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (not (= 5 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 2)) (= |__VERIFIER_assert_#in~cond| 0) (= (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 16) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 0)) 1 0) 0) 0 1) 256) 0)) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_10 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10_68 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_10 Int)) (and (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_10) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_10 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10_68 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10_68 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10_68 18446744073709551616))))) 256) 0)) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10_68 18446744073709551615) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_10_68))) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 0)) (= 5 |~#s_can_fail_allocator_static~0.base|) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 3)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 4)) (= |~#s_can_fail_allocator_static~0.offset| 0) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_9 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_9 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 Int)) (and (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_9) (+ (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 18446744073709551616))) v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_9)) 256) 0)) (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_9_67 18446744073709551615))) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 1) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (not (= 5 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|)) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 2)) (= |__VERIFIER_assert_#in~cond| 0) (= (select |#length| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) 16) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (= (select |#valid| 1) 1) (not (= (mod (ite (= (ite (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 0)) 1 0) 0) 0 1) 256) 0)) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 0)) (= 5 |~#s_can_fail_allocator_static~0.base|) (< |#StackHeapBarrier| |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|) (not (= |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47| 3)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (<= 0 |v_aws_linked_list_node_reset_#in~node.base_BEFORE_CALL_47|))))' at error location [2021-11-25 19:40:35,606 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:40:35,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:40:35,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 16] total 38 [2021-11-25 19:40:35,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994047340] [2021-11-25 19:40:35,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:40:35,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-25 19:40:35,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-25 19:40:35,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2784, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 19:40:35,609 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand has 38 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 states have internal predecessors, (60), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:40:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:37,684 INFO L93 Difference]: Finished difference Result 133 states and 183 transitions. [2021-11-25 19:40:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 19:40:37,685 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 states have internal predecessors, (60), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 34 [2021-11-25 19:40:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:37,687 INFO L225 Difference]: With dead ends: 133 [2021-11-25 19:40:37,687 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 19:40:37,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=305, Invalid=3985, Unknown=0, NotChecked=0, Total=4290 [2021-11-25 19:40:37,690 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:37,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 568 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 476 Invalid, 0 Unknown, 351 Unchecked, 0.8s Time] [2021-11-25 19:40:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 19:40:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2021-11-25 19:40:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 45 states have internal predecessors, (58), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-25 19:40:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2021-11-25 19:40:37,706 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 34 [2021-11-25 19:40:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:37,706 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2021-11-25 19:40:37,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 37 states have internal predecessors, (60), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:40:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2021-11-25 19:40:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 19:40:37,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:37,708 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:37,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:40:37,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:37,935 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:37,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1164486111, now seen corresponding path program 5 times [2021-11-25 19:40:37,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:37,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475904508] [2021-11-25 19:40:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:37,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 19:40:38,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:38,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475904508] [2021-11-25 19:40:38,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475904508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:40:38,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912428375] [2021-11-25 19:40:38,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:40:38,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:38,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:38,211 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:38,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:40:38,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:40:38,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:40:38,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-25 19:40:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:38,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:38,872 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 19:40:38,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 19:40:38,917 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-25 19:40:38,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 19:40:38,967 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-25 19:40:38,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-25 19:40:39,029 INFO L354 Elim1Store]: treesize reduction 172, result has 16.9 percent of original size [2021-11-25 19:40:39,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2021-11-25 19:40:39,107 INFO L354 Elim1Store]: treesize reduction 253, result has 15.1 percent of original size [2021-11-25 19:40:39,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 59 treesize of output 70 [2021-11-25 19:40:39,207 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-25 19:40:39,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2021-11-25 19:40:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:40,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:40:42,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 52 treesize of output 50 [2021-11-25 19:40:42,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3168 treesize of output 3164 [2021-11-25 19:40:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:42,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912428375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:40:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60167006] [2021-11-25 19:40:42,584 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:40:42,584 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:40:42,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:40:42,585 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:40:42,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:40:42,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:42,660 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-25 19:40:42,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-25 19:40:42,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:42,733 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-25 19:40:42,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:40:42,764 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 121 for LOIs [2021-11-25 19:40:42,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:42,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:40:42,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:42,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:42,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:42,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:42,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:40:42,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:42,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 70 treesize of output 69 [2021-11-25 19:40:42,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:42,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2021-11-25 19:40:42,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:42,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:42,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:42,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:40:43,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:43,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:43,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:43,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 545 treesize of output 489 [2021-11-25 19:40:43,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 489 treesize of output 473 [2021-11-25 19:40:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 473 treesize of output 417 [2021-11-25 19:40:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:43,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:40:43,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-25 19:40:43,649 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 131 for LOIs [2021-11-25 19:40:43,942 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 117 for LOIs [2021-11-25 19:40:43,968 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 78 for LOIs [2021-11-25 19:40:44,128 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 135 for LOIs [2021-11-25 19:40:44,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:44,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:44,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:40:44,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 14 treesize of output 10 [2021-11-25 19:40:44,667 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:40:50,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2937#(and (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 Int)) (and (or (and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75) 16) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= 1 (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75)) (not (= (mod (ite (= (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 0)) 1 0) 0) 0 1) 256) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75)) (exists ((v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_11 Int) (aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_11 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 18446744073709551615) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_11) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_11 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_11_68 18446744073709551616))))) 256) 0)))) (= (select |#valid| 1) 1) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 4)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 2)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 3)) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 0)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (exists ((aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12_68 Int) (v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_12 Int) (v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_12 Int)) (and (<= 0 aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12_68) (< aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12_68 18446744073709551615) (not (= (mod (select (select |#memory_int| v_aws_is_mem_zeroed_~buf_u8~0.base_BEFORE_RETURN_12) (+ v_aws_is_mem_zeroed_~buf_u8~0.offset_BEFORE_RETURN_12 (ite (<= (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12_68 18446744073709551616) 9223372036854775807) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12_68 18446744073709551616) (+ (- 18446744073709551616) (mod aux_mod_v_aws_is_mem_zeroed_~i~0_BEFORE_RETURN_12_68 18446744073709551616))))) 256) 0)))) (= (select |#length| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75) 16) (= |~#s_can_fail_allocator_static~0.offset| 0) (= 2 (select |#length| 1)) (= 78 (select |#length| 4)) (= (select |#valid| 3) 1) (= 37 (select |#length| 2)) (= 1 (select |#valid| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75)) (not (= (mod (ite (= (ite (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 0)) 1 0) 0) 0 1) 256) 0)) (= |__VERIFIER_assert_#in~cond| 0) (= 40 (select |#length| 5)) (= (select |#valid| 4) 1) (not (= 5 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75)) (= (select |#valid| 1) 1) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 4)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 2)) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 3)) (= (select |#valid| 0) 0) (= ~tl_last_error~0 0) (not (= v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75 0)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= 5 |~#s_can_fail_allocator_static~0.base|) (< |#StackHeapBarrier| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) (<= 0 v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_75))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))' at error location [2021-11-25 19:40:50,597 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:40:50,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:40:50,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 18] total 43 [2021-11-25 19:40:50,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500054875] [2021-11-25 19:40:50,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:40:50,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-25 19:40:50,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-25 19:40:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3263, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 19:40:50,600 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:40:51,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:51,105 INFO L93 Difference]: Finished difference Result 123 states and 160 transitions. [2021-11-25 19:40:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 19:40:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2021-11-25 19:40:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:51,106 INFO L225 Difference]: With dead ends: 123 [2021-11-25 19:40:51,106 INFO L226 Difference]: Without dead ends: 75 [2021-11-25 19:40:51,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=308, Invalid=3474, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 19:40:51,109 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:51,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 323 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 219 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2021-11-25 19:40:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-25 19:40:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-11-25 19:40:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.38) internal successors, (69), 52 states have internal predecessors, (69), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-25 19:40:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2021-11-25 19:40:51,123 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 37 [2021-11-25 19:40:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:51,123 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2021-11-25 19:40:51,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-25 19:40:51,124 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2021-11-25 19:40:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 19:40:51,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:51,126 INFO L514 BasicCegarLoop]: trace histogram [8, 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] [2021-11-25 19:40:51,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:40:51,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:51,334 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1194901829, now seen corresponding path program 1 times [2021-11-25 19:40:51,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:51,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112966342] [2021-11-25 19:40:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:51,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-25 19:40:51,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:51,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112966342] [2021-11-25 19:40:51,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112966342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:40:51,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:40:51,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:40:51,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298398130] [2021-11-25 19:40:51,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:40:51,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:40:51,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:40:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:40:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:40:51,417 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 19:40:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:40:51,458 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2021-11-25 19:40:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:40:51,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-11-25 19:40:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:40:51,460 INFO L225 Difference]: With dead ends: 74 [2021-11-25 19:40:51,460 INFO L226 Difference]: Without dead ends: 67 [2021-11-25 19:40:51,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:40:51,462 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:40:51,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 139 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:40:51,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-25 19:40:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-25 19:40:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.38) internal successors, (69), 52 states have internal predecessors, (69), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-25 19:40:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-11-25 19:40:51,487 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 41 [2021-11-25 19:40:51,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:40:51,487 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-11-25 19:40:51,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-25 19:40:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-11-25 19:40:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 19:40:51,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:40:51,494 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:40:51,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:40:51,495 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:40:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:40:51,495 INFO L85 PathProgramCache]: Analyzing trace with hash -682223601, now seen corresponding path program 6 times [2021-11-25 19:40:51,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:40:51,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695306424] [2021-11-25 19:40:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:40:51,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:40:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:40:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 19:40:51,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:40:51,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695306424] [2021-11-25 19:40:51,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695306424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:40:51,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177401283] [2021-11-25 19:40:51,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:40:51,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:40:51,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:40:51,789 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:40:51,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b79a550e-a604-4435-9f2e-78992f800546/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:40:52,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:40:52,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:40:52,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-25 19:40:52,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:40:52,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:40:52,194 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 19:40:52,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 19:40:52,228 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-25 19:40:52,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 19:40:52,278 INFO L354 Elim1Store]: treesize reduction 115, result has 19.0 percent of original size [2021-11-25 19:40:52,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-25 19:40:52,342 INFO L354 Elim1Store]: treesize reduction 184, result has 16.7 percent of original size [2021-11-25 19:40:52,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 59 [2021-11-25 19:40:52,425 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-25 19:40:52,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-25 19:40:52,528 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-25 19:40:52,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2021-11-25 19:40:52,628 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-25 19:40:52,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2021-11-25 19:40:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:40:54,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:40:58,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 117 treesize of output 113 [2021-11-25 19:40:58,254 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-25 19:40:58,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 38377 treesize of output 38353