./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:27:55,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:27:55,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:27:55,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:27:55,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:27:55,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:27:55,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:27:55,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:27:55,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:27:55,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:27:55,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:27:55,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:27:55,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:27:55,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:27:55,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:27:55,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:27:55,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:27:55,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:27:55,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:27:55,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:27:55,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:27:55,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:27:55,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:27:55,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:27:55,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:27:55,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:27:55,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:27:55,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:27:55,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:27:55,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:27:55,317 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:27:55,319 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:27:55,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:27:55,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:27:55,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:27:55,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:27:55,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:27:55,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:27:55,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:27:55,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:27:55,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:27:55,329 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:27:55,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:27:55,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:27:55,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:27:55,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:27:55,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:27:55,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:27:55,384 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:27:55,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:27:55,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:27:55,385 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:27:55,386 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:27:55,386 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:27:55,386 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:27:55,386 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:27:55,387 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:27:55,387 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:27:55,387 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:27:55,387 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:27:55,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:27:55,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:27:55,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:27:55,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:27:55,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:27:55,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:27:55,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:27:55,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:27:55,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:27:55,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:27:55,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:27:55,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:27:55,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:27:55,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:27:55,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:27:55,393 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:27:55,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:27:55,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:27:55,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:27:55,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:27:55,395 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_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2021-11-21 00:27:55,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:27:55,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:27:55,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:27:55,745 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:27:55,746 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:27:55,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-21 00:27:55,847 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/data/3acab23a0/d92d72446a6a4aa197624d7b1a8b39de/FLAG4c7b661dd [2021-11-21 00:27:56,599 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:27:56,599 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2021-11-21 00:27:56,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/data/3acab23a0/d92d72446a6a4aa197624d7b1a8b39de/FLAG4c7b661dd [2021-11-21 00:27:56,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/data/3acab23a0/d92d72446a6a4aa197624d7b1a8b39de [2021-11-21 00:27:56,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:27:56,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:27:56,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:27:56,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:27:56,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:27:56,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:27:56" (1/1) ... [2021-11-21 00:27:56,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b683e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:56, skipping insertion in model container [2021-11-21 00:27:56,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:27:56" (1/1) ... [2021-11-21 00:27:56,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:27:56,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:27:57,130 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_f6e13563-bacf-4e64-866a-f77826a15cca/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2021-11-21 00:27:57,137 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_f6e13563-bacf-4e64-866a-f77826a15cca/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2021-11-21 00:27:57,848 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,849 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,850 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,851 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,852 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,867 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,868 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,870 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,870 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,872 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,873 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,874 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:57,875 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,214 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:27:58,216 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:27:58,217 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:27:58,218 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:27:58,223 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:27:58,224 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:27:58,225 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:27:58,225 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:27:58,226 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:27:58,226 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:27:58,378 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:27:58,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:27:58,423 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:27:58,460 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_f6e13563-bacf-4e64-866a-f77826a15cca/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2021-11-21 00:27:58,460 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_f6e13563-bacf-4e64-866a-f77826a15cca/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2021-11-21 00:27:58,540 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,540 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,541 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,541 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,542 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,565 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,566 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,568 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,568 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,569 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:27:58,700 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:27:58,701 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:27:58,702 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:27:58,702 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:27:58,708 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:27:58,708 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:27:58,709 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:27:58,710 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:27:58,710 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:27:58,710 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:27:58,759 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:27:58,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:27:58,960 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:27:58,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58 WrapperNode [2021-11-21 00:27:58,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:27:58,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:27:58,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:27:58,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:27:58,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,068 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,108 INFO L137 Inliner]: procedures = 679, calls = 1041, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 142 [2021-11-21 00:27:59,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:27:59,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:27:59,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:27:59,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:27:59,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:27:59,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:27:59,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:27:59,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:27:59,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (1/1) ... [2021-11-21 00:27:59,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:27:59,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:27:59,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:27:59,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:27:59,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:27:59,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:27:59,258 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:27:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-21 00:27:59,259 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-21 00:27:59,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:27:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-21 00:27:59,260 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-21 00:27:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:27:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:27:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:27:59,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:27:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:27:59,261 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:27:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:27:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:27:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:27:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 00:27:59,261 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 00:27:59,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:27:59,538 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:27:59,539 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:27:59,826 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:27:59,890 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:27:59,891 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:27:59,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:27:59 BoogieIcfgContainer [2021-11-21 00:27:59,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:27:59,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:27:59,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:27:59,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:27:59,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:27:56" (1/3) ... [2021-11-21 00:27:59,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64471006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:27:59, skipping insertion in model container [2021-11-21 00:27:59,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:27:58" (2/3) ... [2021-11-21 00:27:59,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64471006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:27:59, skipping insertion in model container [2021-11-21 00:27:59,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:27:59" (3/3) ... [2021-11-21 00:27:59,901 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2021-11-21 00:27:59,906 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:27:59,906 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:27:59,952 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:27:59,958 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 [2021-11-21 00:27:59,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:27:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-21 00:27:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-21 00:27:59,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:27:59,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:27:59,986 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:27:59,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:27:59,995 INFO L85 PathProgramCache]: Analyzing trace with hash -176466560, now seen corresponding path program 1 times [2021-11-21 00:28:00,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:28:00,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500346439] [2021-11-21 00:28:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:28:00,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:28:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:28:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:28:00,460 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:28:00,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500346439] [2021-11-21 00:28:00,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500346439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:28:00,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517042196] [2021-11-21 00:28:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:28:00,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:28:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:28:00,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:28:00,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:28:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:28:00,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-21 00:28:00,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:28:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:00,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:28:01,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:28:01,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2021-11-21 00:28:01,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:01,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2021-11-21 00:28:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:28:03,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:28:03,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517042196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:28:03,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:28:03,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-11-21 00:28:03,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813829186] [2021-11-21 00:28:03,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:28:03,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:28:03,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:28:03,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:28:03,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:28:03,953 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:28:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:28:04,370 INFO L93 Difference]: Finished difference Result 119 states and 174 transitions. [2021-11-21 00:28:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:28:04,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2021-11-21 00:28:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:28:04,387 INFO L225 Difference]: With dead ends: 119 [2021-11-21 00:28:04,387 INFO L226 Difference]: Without dead ends: 80 [2021-11-21 00:28:04,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:28:04,401 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 18 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:28:04,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 228 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 81 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2021-11-21 00:28:04,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-21 00:28:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2021-11-21 00:28:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-21 00:28:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2021-11-21 00:28:04,471 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 37 [2021-11-21 00:28:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:28:04,471 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2021-11-21 00:28:04,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:28:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2021-11-21 00:28:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 00:28:04,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:28:04,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:28:04,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:28:04,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:28:04,699 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:28:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:28:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1924856341, now seen corresponding path program 1 times [2021-11-21 00:28:04,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:28:04,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960435110] [2021-11-21 00:28:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:28:04,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:28:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:28:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:28:04,915 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:28:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960435110] [2021-11-21 00:28:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960435110] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:28:04,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099832083] [2021-11-21 00:28:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:28:04,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:28:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:28:04,920 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:28:04,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:28:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:28:05,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-21 00:28:05,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:28:05,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:28:05,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:28:05,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-21 00:28:05,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 76 [2021-11-21 00:28:05,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,620 INFO L354 Elim1Store]: treesize reduction 264, result has 14.8 percent of original size [2021-11-21 00:28:05,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 186 treesize of output 140 [2021-11-21 00:28:05,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:28:05,700 INFO L354 Elim1Store]: treesize reduction 310, result has 15.8 percent of original size [2021-11-21 00:28:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 179 treesize of output 161 [2021-11-21 00:28:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:28:11,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:28:49,566 WARN L227 SmtUtils]: Spent 22.11s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:28:51,927 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (and (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_1 Int)) (let ((.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse3 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8)) (.cse4 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (not (= (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse4) 0)) (not (= (select (select (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse6 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse6 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_1))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse4) 0))))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_5 Int)) (= (select (select (let ((.cse7 (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse8 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse8 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_3 Int)) (= (select (select (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse10 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse10 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_6 Int)) (= (select (select (let ((.cse11 (let ((.cse12 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse12 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse12 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_6 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_subst_6))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_4 Int)) (= (select (select (let ((.cse13 (let ((.cse14 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse14 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse14 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_4 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_subst_4))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_2 Int)) (let ((.cse16 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse18 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8))) (or (not (= (select (select (let ((.cse15 (let ((.cse17 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse17 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse17 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse18 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)) (not (= (select (select (let ((.cse19 (let ((.cse20 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse20 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse20 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse18 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_2 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse19 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse19 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse16 v_subst_2))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))) is different from false [2021-11-21 00:28:53,952 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (and (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_1 Int)) (let ((.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse3 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8)) (.cse4 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (not (= (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_1 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse4) 0)) (not (= (select (select (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse6 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse6 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_subst_1))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse4) 0))))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_5 Int)) (= (select (select (let ((.cse7 (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse8 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse8 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_5 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse7 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_3 Int)) (= (select (select (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse10 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse10 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_3 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse9 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_6 Int)) (= (select (select (let ((.cse11 (let ((.cse12 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse12 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse12 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_6 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse11 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_subst_6))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_4 Int)) (= (select (select (let ((.cse13 (let ((.cse14 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse14 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse14 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_4 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse13 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_subst_4))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16)) 0)) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| Int) (v_subst_2 Int)) (let ((.cse16 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse18 (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7| 8))) (or (not (= (select (select (let ((.cse15 (let ((.cse17 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store .cse17 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse17 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse18 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) v_subst_2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|))))) (store .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse15 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)) (not (= (select (select (let ((.cse19 (let ((.cse20 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~node~0#1.offset_7|)))) (store .cse20 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| (store (store (select .cse20 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|) .cse18 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset|) v_subst_2 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 16)))))) (store .cse19 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select .cse19 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse16 v_subst_2))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)))) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))) is different from true [2021-11-21 00:28:54,945 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 00:28:54,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 977275 treesize of output 974099 [2021-11-21 00:29:27,712 WARN L227 SmtUtils]: Spent 32.76s on a formula simplification. DAG size of input: 1046 DAG size of output: 1046 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:29:27,984 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-21 00:29:27,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3563283 treesize of output 3555731 [2021-11-21 00:32:18,033 WARN L227 SmtUtils]: Spent 2.83m on a formula simplification. DAG size of input: 4824 DAG size of output: 4824 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-21 00:32:18,248 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-21 00:32:18,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1181819660] [2021-11-21 00:32:18,280 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2021-11-21 00:32:18,283 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:32:18,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:32:18,293 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:32:18,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:32:18,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:18,474 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 00:32:18,475 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 58 [2021-11-21 00:32:18,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:18,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:18,664 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:32:18,665 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 [2021-11-21 00:32:21,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:32:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:32:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:32:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:32:22,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,264 INFO L354 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2021-11-21 00:32:22,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:32:22,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,353 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:32:22,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 00:32:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:32:22,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:32:22,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:32:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:22,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:22,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:32:23,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:23,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:23,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:23,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:23,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:23,690 INFO L354 Elim1Store]: treesize reduction 483, result has 19.9 percent of original size [2021-11-21 00:32:23,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 750 treesize of output 759 [2021-11-21 00:32:24,320 INFO L354 Elim1Store]: treesize reduction 226, result has 23.1 percent of original size [2021-11-21 00:32:24,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 859 treesize of output 898 [2021-11-21 00:32:24,680 INFO L354 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2021-11-21 00:32:24,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 888 treesize of output 900 [2021-11-21 00:32:24,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:24,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:24,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:24,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:24,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:32:25,320 INFO L354 Elim1Store]: treesize reduction 597, result has 18.8 percent of original size [2021-11-21 00:32:25,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 894 treesize of output 897 [2021-11-21 00:32:25,467 INFO L354 Elim1Store]: treesize reduction 128, result has 10.5 percent of original size [2021-11-21 00:32:25,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 979 treesize of output 932 [2021-11-21 00:32:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:25,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 934 treesize of output 913 [2021-11-21 00:32:25,645 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:32:25,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 922 treesize of output 870 [2021-11-21 00:32:32,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:32:32,606 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:32:32,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:32:32,652 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:32:32,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 132 [2021-11-21 00:32:32,683 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:32:32,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 86 [2021-11-21 00:32:32,706 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:32:32,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-21 00:32:32,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:32:32,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:32,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:32:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:32,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:32,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:32:32,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:32,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:32:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:32,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:32:35,488 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2021-11-21 00:32:37,086 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 32 for LOIs [2021-11-21 00:32:37,152 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:32:37,282 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:32:39,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1181819660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:39,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:32:39,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 16 [2021-11-21 00:32:39,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045675870] [2021-11-21 00:32:39,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:39,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:32:39,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:39,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:32:39,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=777, Unknown=5, NotChecked=56, Total=930 [2021-11-21 00:32:39,275 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:32:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:39,911 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2021-11-21 00:32:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:32:39,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2021-11-21 00:32:39,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:39,914 INFO L225 Difference]: With dead ends: 100 [2021-11-21 00:32:39,915 INFO L226 Difference]: Without dead ends: 52 [2021-11-21 00:32:39,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 70 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=100, Invalid=829, Unknown=5, NotChecked=58, Total=992 [2021-11-21 00:32:39,917 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:39,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 319 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2021-11-21 00:32:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-21 00:32:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2021-11-21 00:32:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-21 00:32:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-11-21 00:32:39,930 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 38 [2021-11-21 00:32:39,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:39,931 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-11-21 00:32:39,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:32:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-11-21 00:32:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-21 00:32:39,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:39,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:32:39,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:40,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:40,139 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:40,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:40,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1266222812, now seen corresponding path program 1 times [2021-11-21 00:32:40,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:40,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228012464] [2021-11-21 00:32:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:40,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:32:40,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:40,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228012464] [2021-11-21 00:32:40,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228012464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:40,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327239430] [2021-11-21 00:32:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:40,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:40,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:40,241 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:40,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:32:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:40,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:32:40,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:32:40,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:32:40,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327239430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:40,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:32:40,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-21 00:32:40,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459359466] [2021-11-21 00:32:40,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:40,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:32:40,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:40,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:32:40,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:32:40,472 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:32:40,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:40,606 INFO L93 Difference]: Finished difference Result 88 states and 115 transitions. [2021-11-21 00:32:40,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:32:40,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2021-11-21 00:32:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:40,608 INFO L225 Difference]: With dead ends: 88 [2021-11-21 00:32:40,609 INFO L226 Difference]: Without dead ends: 53 [2021-11-21 00:32:40,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:32:40,611 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:40,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 151 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:32:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-21 00:32:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-21 00:32:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-21 00:32:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-11-21 00:32:40,623 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 39 [2021-11-21 00:32:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:40,624 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-11-21 00:32:40,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:32:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-11-21 00:32:40,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 00:32:40,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:40,626 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:32:40,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:40,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:40,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:40,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:40,831 INFO L85 PathProgramCache]: Analyzing trace with hash -693180958, now seen corresponding path program 1 times [2021-11-21 00:32:40,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:40,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43875950] [2021-11-21 00:32:40,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:40,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:32:40,980 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:40,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43875950] [2021-11-21 00:32:40,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43875950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:40,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898632410] [2021-11-21 00:32:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:40,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:40,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:40,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:32:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:41,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:32:41,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:32:41,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:32:41,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898632410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:41,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:32:41,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-21 00:32:41,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635998861] [2021-11-21 00:32:41,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:41,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:32:41,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:41,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:32:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:32:41,260 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:32:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:41,509 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2021-11-21 00:32:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:32:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2021-11-21 00:32:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:41,511 INFO L225 Difference]: With dead ends: 105 [2021-11-21 00:32:41,511 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 00:32:41,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:32:41,513 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 64 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:41,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 182 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:32:41,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 00:32:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2021-11-21 00:32:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-21 00:32:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-11-21 00:32:41,541 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-11-21 00:32:41,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:41,541 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-11-21 00:32:41,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:32:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-11-21 00:32:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 00:32:41,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:41,543 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:32:41,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:41,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:41,763 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash 938537906, now seen corresponding path program 1 times [2021-11-21 00:32:41,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:41,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470090373] [2021-11-21 00:32:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:41,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:32:41,933 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:41,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470090373] [2021-11-21 00:32:41,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470090373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:41,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402521926] [2021-11-21 00:32:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:41,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:41,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:41,935 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:41,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:32:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:42,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 00:32:42,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:32:42,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:32:42,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402521926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:32:42,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:32:42,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-21 00:32:42,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972453739] [2021-11-21 00:32:42,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:32:42,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:32:42,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:32:42,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:32:42,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:32:42,161 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:32:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:32:42,222 INFO L93 Difference]: Finished difference Result 106 states and 147 transitions. [2021-11-21 00:32:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:32:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2021-11-21 00:32:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:32:42,225 INFO L225 Difference]: With dead ends: 106 [2021-11-21 00:32:42,225 INFO L226 Difference]: Without dead ends: 64 [2021-11-21 00:32:42,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:32:42,227 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:32:42,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 95 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:32:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-21 00:32:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-11-21 00:32:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 36 states have internal predecessors, (42), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-21 00:32:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2021-11-21 00:32:42,242 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 42 [2021-11-21 00:32:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:32:42,243 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2021-11-21 00:32:42,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-21 00:32:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2021-11-21 00:32:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 00:32:42,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:32:42,245 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:32:42,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:32:42,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:42,471 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:32:42,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:32:42,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1523962277, now seen corresponding path program 1 times [2021-11-21 00:32:42,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:32:42,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360785122] [2021-11-21 00:32:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:42,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:32:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:32:42,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:32:42,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360785122] [2021-11-21 00:32:42,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360785122] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:32:42,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982401481] [2021-11-21 00:32:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:32:42,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:32:42,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:32:42,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:32:42,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:32:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:32:42,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-21 00:32:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:32:42,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:42,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-21 00:32:42,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:42,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:42,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:32:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:32:50,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:32:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:32:54,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982401481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:32:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1936522545] [2021-11-21 00:32:54,701 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-21 00:32:54,702 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:32:54,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:32:54,702 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:32:54,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:32:54,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:54,796 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 00:32:54,796 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 58 [2021-11-21 00:32:54,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:54,897 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:32:54,897 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 [2021-11-21 00:32:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:32:57,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:32:57,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:32:57,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:32:57,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:32:57,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-21 00:32:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:57,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:32:58,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:32:58,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:33:03,579 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 121 for LOIs [2021-11-21 00:33:07,733 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 33 for LOIs [2021-11-21 00:33:07,811 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:33:08,066 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 121 for LOIs [2021-11-21 00:33:08,773 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:33:13,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1936522545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:13,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:33:13,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 16, 8] total 41 [2021-11-21 00:33:13,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067249391] [2021-11-21 00:33:13,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:13,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-21 00:33:13,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:13,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-21 00:33:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:33:13,024 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:33:14,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:33:14,012 INFO L93 Difference]: Finished difference Result 135 states and 190 transitions. [2021-11-21 00:33:14,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:33:14,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2021-11-21 00:33:14,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:33:14,014 INFO L225 Difference]: With dead ends: 135 [2021-11-21 00:33:14,014 INFO L226 Difference]: Without dead ends: 92 [2021-11-21 00:33:14,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:33:14,016 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 34 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:33:14,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 397 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 430 Invalid, 0 Unknown, 27 Unchecked, 1.0s Time] [2021-11-21 00:33:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-21 00:33:14,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-11-21 00:33:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 56 states have internal predecessors, (65), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (32), 22 states have call predecessors, (32), 23 states have call successors, (32) [2021-11-21 00:33:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2021-11-21 00:33:14,042 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 45 [2021-11-21 00:33:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:33:14,042 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2021-11-21 00:33:14,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:33:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2021-11-21 00:33:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 00:33:14,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:33:14,046 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:33:14,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:33:14,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 00:33:14,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:33:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:33:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1772458512, now seen corresponding path program 1 times [2021-11-21 00:33:14,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:33:14,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435583547] [2021-11-21 00:33:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:14,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:33:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:33:14,351 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:33:14,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435583547] [2021-11-21 00:33:14,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435583547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:33:14,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367552194] [2021-11-21 00:33:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:33:14,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:33:14,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:33:14,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:33:14,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:33:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:33:14,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-21 00:33:14,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:33:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:14,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:33:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:14,732 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-21 00:33:14,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 81 [2021-11-21 00:33:14,743 INFO L354 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2021-11-21 00:33:14,743 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 1 case distinctions, treesize of input 104 treesize of output 77 [2021-11-21 00:33:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:33:25,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:33:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:33:29,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367552194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:33:29,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1767069089] [2021-11-21 00:33:29,962 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-21 00:33:29,962 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:33:29,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:33:29,963 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:33:29,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:33:30,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:30,051 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:33:30,052 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 [2021-11-21 00:33:30,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:30,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 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 [2021-11-21 00:33:32,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:33:32,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:33:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:33:32,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:33:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:33:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:33:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,697 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 00:33:32,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:33:32,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:32,852 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:33:32,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:33:32,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:32,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:33,031 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:33:33,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:33:33,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,236 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:33:33,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:33:33,374 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:33:33,375 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2021-11-21 00:33:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:33,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:33,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:33,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:33,798 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:33:33,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 425 treesize of output 453 [2021-11-21 00:33:34,107 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:33:34,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 510 treesize of output 591 [2021-11-21 00:33:34,183 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-21 00:33:34,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 591 treesize of output 574 [2021-11-21 00:33:34,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 571 treesize of output 558 [2021-11-21 00:33:34,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:34,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:34,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:34,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:33:34,564 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 00:33:34,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 552 treesize of output 568 [2021-11-21 00:33:34,956 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:33:34,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 589 treesize of output 679 [2021-11-21 00:33:35,044 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:33:35,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 628 [2021-11-21 00:33:48,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:33:48,719 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:33:48,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:33:48,764 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:33:48,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 00:33:48,803 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:33:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 86 [2021-11-21 00:33:48,833 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:33:48,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 42 [2021-11-21 00:33:48,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:33:49,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:49,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:49,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:33:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:49,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:33:49,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:49,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:33:49,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:33:49,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:33:52,190 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 50 for LOIs [2021-11-21 00:33:56,363 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:33:56,405 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:33:56,509 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 80 for LOIs [2021-11-21 00:33:56,896 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:33:59,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1767069089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:33:59,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:33:59,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [6, 17, 8] total 44 [2021-11-21 00:33:59,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535638370] [2021-11-21 00:33:59,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:33:59,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 00:33:59,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:33:59,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 00:33:59,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 00:33:59,861 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:34:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:00,763 INFO L93 Difference]: Finished difference Result 152 states and 201 transitions. [2021-11-21 00:34:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:34:00,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2021-11-21 00:34:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:00,765 INFO L225 Difference]: With dead ends: 152 [2021-11-21 00:34:00,765 INFO L226 Difference]: Without dead ends: 104 [2021-11-21 00:34:00,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 00:34:00,767 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:00,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 214 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 257 Invalid, 0 Unknown, 241 Unchecked, 0.4s Time] [2021-11-21 00:34:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-21 00:34:00,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-11-21 00:34:00,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 61 states have internal predecessors, (72), 25 states have call successors, (25), 10 states have call predecessors, (25), 11 states have return successors, (33), 23 states have call predecessors, (33), 24 states have call successors, (33) [2021-11-21 00:34:00,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 130 transitions. [2021-11-21 00:34:00,796 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 130 transitions. Word has length 46 [2021-11-21 00:34:00,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:00,797 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 130 transitions. [2021-11-21 00:34:00,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:34:00,797 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 130 transitions. [2021-11-21 00:34:00,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-21 00:34:00,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:00,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:00,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:01,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:34:01,015 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash -2001458783, now seen corresponding path program 1 times [2021-11-21 00:34:01,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:01,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409231620] [2021-11-21 00:34:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:01,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:34:01,193 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:01,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409231620] [2021-11-21 00:34:01,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409231620] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:01,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912688219] [2021-11-21 00:34:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:01,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:01,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:01,194 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:01,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:34:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:01,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-21 00:34:01,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:01,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:01,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-21 00:34:01,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:01,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:01,828 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:34:01,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 19 [2021-11-21 00:34:01,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:34:01,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:34:02,128 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 82 treesize of output 78 [2021-11-21 00:34:02,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:34:02,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912688219] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:34:02,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395577780] [2021-11-21 00:34:02,321 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:34:02,322 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:34:02,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:34:02,323 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:34:02,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:02,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:02,431 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:34:02,431 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 [2021-11-21 00:34:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:02,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 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 [2021-11-21 00:34:04,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:34:04,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:34:04,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:34:04,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:34:04,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-21 00:34:04,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:04,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:04,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:34:05,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:05,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:34:09,693 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 121 for LOIs [2021-11-21 00:34:16,791 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 33 for LOIs [2021-11-21 00:34:16,846 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:34:16,973 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 121 for LOIs [2021-11-21 00:34:17,380 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:34:23,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [395577780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:34:23,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:34:23,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [8, 11, 10] total 41 [2021-11-21 00:34:23,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799107112] [2021-11-21 00:34:23,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:34:23,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:34:23,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:34:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:34:23,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:34:23,067 INFO L87 Difference]: Start difference. First operand 95 states and 130 transitions. Second operand has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:34:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:34:23,713 INFO L93 Difference]: Finished difference Result 171 states and 226 transitions. [2021-11-21 00:34:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:34:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2021-11-21 00:34:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:34:23,715 INFO L225 Difference]: With dead ends: 171 [2021-11-21 00:34:23,715 INFO L226 Difference]: Without dead ends: 111 [2021-11-21 00:34:23,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 00:34:23,717 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:34:23,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 212 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 235 Invalid, 0 Unknown, 34 Unchecked, 0.6s Time] [2021-11-21 00:34:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-21 00:34:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2021-11-21 00:34:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 69 states have internal predecessors, (82), 26 states have call successors, (26), 12 states have call predecessors, (26), 12 states have return successors, (34), 24 states have call predecessors, (34), 25 states have call successors, (34) [2021-11-21 00:34:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2021-11-21 00:34:23,755 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 47 [2021-11-21 00:34:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:34:23,755 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2021-11-21 00:34:23,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:34:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2021-11-21 00:34:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:34:23,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:34:23,758 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:34:23,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:34:23,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:23,987 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:34:23,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:34:23,987 INFO L85 PathProgramCache]: Analyzing trace with hash -288172042, now seen corresponding path program 1 times [2021-11-21 00:34:23,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:34:23,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754112700] [2021-11-21 00:34:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:23,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:34:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-21 00:34:24,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:34:24,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754112700] [2021-11-21 00:34:24,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754112700] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:34:24,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634994121] [2021-11-21 00:34:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:34:24,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:34:24,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:34:24,173 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:34:24,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:34:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:34:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-21 00:34:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:34:24,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:24,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:34:24,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:24,477 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-21 00:34:24,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 48 [2021-11-21 00:34:27,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:27,053 INFO L354 Elim1Store]: treesize reduction 148, result has 0.7 percent of original size [2021-11-21 00:34:27,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 98 treesize of output 40 [2021-11-21 00:34:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:34:27,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:34:29,295 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 3049 treesize of output 3017 [2021-11-21 00:34:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:34:29,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634994121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:34:29,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855560495] [2021-11-21 00:34:29,776 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:34:29,777 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:34:29,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:34:29,777 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:34:29,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:34:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:29,839 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 00:34:29,839 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 58 [2021-11-21 00:34:29,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:29,960 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:34:29,960 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 [2021-11-21 00:34:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:34:32,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:34:32,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:34:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:34:32,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,464 INFO L354 Elim1Store]: treesize reduction 114, result has 28.7 percent of original size [2021-11-21 00:34:32,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:34:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:32,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:32,564 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-21 00:34:32,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 22 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:34:32,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:34:32,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:34:32,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:32,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:32,895 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:34:32,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 00:34:33,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:33,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:33,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:33,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:33,674 INFO L354 Elim1Store]: treesize reduction 483, result has 19.9 percent of original size [2021-11-21 00:34:33,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 746 treesize of output 755 [2021-11-21 00:34:33,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:33,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:33,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:33,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:34:34,197 INFO L354 Elim1Store]: treesize reduction 603, result has 18.0 percent of original size [2021-11-21 00:34:34,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 837 treesize of output 846 [2021-11-21 00:34:34,389 INFO L354 Elim1Store]: treesize reduction 182, result has 18.0 percent of original size [2021-11-21 00:34:34,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 940 treesize of output 952 [2021-11-21 00:34:34,621 INFO L354 Elim1Store]: treesize reduction 246, result has 16.3 percent of original size [2021-11-21 00:34:34,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 946 treesize of output 965 [2021-11-21 00:34:34,682 INFO L354 Elim1Store]: treesize reduction 128, result has 10.5 percent of original size [2021-11-21 00:34:34,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 955 treesize of output 908 [2021-11-21 00:34:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:34,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 910 treesize of output 889 [2021-11-21 00:34:34,776 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:34:34,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 898 treesize of output 846 [2021-11-21 00:34:44,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:34:45,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:34:45,045 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:34:45,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:34:45,070 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:34:45,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 146 [2021-11-21 00:34:45,103 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:34:45,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-21 00:34:45,126 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:34:45,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 00:34:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:45,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:34:45,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:45,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:45,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:45,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:34:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:45,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:34:45,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:34:48,514 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2021-11-21 00:34:55,222 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:34:55,277 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:34:55,400 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:34:56,110 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:35:02,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1855560495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:02,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:35:02,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 12, 11] total 46 [2021-11-21 00:35:02,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401303480] [2021-11-21 00:35:02,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:02,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:35:02,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:35:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1900, Unknown=3, NotChecked=0, Total=2070 [2021-11-21 00:35:02,273 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:35:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:03,807 INFO L93 Difference]: Finished difference Result 176 states and 225 transitions. [2021-11-21 00:35:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 00:35:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-11-21 00:35:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:03,811 INFO L225 Difference]: With dead ends: 176 [2021-11-21 00:35:03,811 INFO L226 Difference]: Without dead ends: 123 [2021-11-21 00:35:03,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=191, Invalid=2158, Unknown=3, NotChecked=0, Total=2352 [2021-11-21 00:35:03,813 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:03,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 190 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 418 Invalid, 0 Unknown, 198 Unchecked, 0.8s Time] [2021-11-21 00:35:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-21 00:35:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2021-11-21 00:35:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 79 states have internal predecessors, (92), 27 states have call successors, (27), 13 states have call predecessors, (27), 14 states have return successors, (30), 25 states have call predecessors, (30), 26 states have call successors, (30) [2021-11-21 00:35:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2021-11-21 00:35:03,858 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 48 [2021-11-21 00:35:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:03,859 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2021-11-21 00:35:03,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:35:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2021-11-21 00:35:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 00:35:03,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:03,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:03,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:04,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:04,081 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:04,081 INFO L85 PathProgramCache]: Analyzing trace with hash -963369005, now seen corresponding path program 1 times [2021-11-21 00:35:04,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:04,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572499790] [2021-11-21 00:35:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:04,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:35:04,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:04,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572499790] [2021-11-21 00:35:04,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572499790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:04,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599711977] [2021-11-21 00:35:04,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:04,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:04,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:04,195 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:04,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:35:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:04,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-21 00:35:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:04,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-21 00:35:04,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:04,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-21 00:35:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:35:10,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:35:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-21 00:35:16,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599711977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:35:16,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026650302] [2021-11-21 00:35:16,624 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:35:16,624 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:35:16,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:35:16,625 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:35:16,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:35:16,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:16,770 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 00:35:16,770 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 58 [2021-11-21 00:35:16,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:16,880 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:35:16,881 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 [2021-11-21 00:35:18,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:35:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:18,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:35:19,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:35:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:35:19,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-21 00:35:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:35:19,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:35:19,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:19,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:35:32,641 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 130 for LOIs [2021-11-21 00:35:34,232 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2021-11-21 00:35:40,182 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 19 for LOIs [2021-11-21 00:35:40,217 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:35:40,343 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:35:40,969 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:35:50,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:35:50,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:35:50,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 17, 11] total 29 [2021-11-21 00:35:50,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060205136] [2021-11-21 00:35:50,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:35:50,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:35:50,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:35:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=2829, Unknown=0, NotChecked=0, Total=3192 [2021-11-21 00:35:50,072 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-21 00:35:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:53,028 INFO L93 Difference]: Finished difference Result 315 states and 469 transitions. [2021-11-21 00:35:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-21 00:35:53,029 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) Word has length 48 [2021-11-21 00:35:53,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:53,033 INFO L225 Difference]: With dead ends: 315 [2021-11-21 00:35:53,033 INFO L226 Difference]: Without dead ends: 245 [2021-11-21 00:35:53,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=496, Invalid=4474, Unknown=0, NotChecked=0, Total=4970 [2021-11-21 00:35:53,038 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 84 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:53,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 710 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1215 Invalid, 0 Unknown, 373 Unchecked, 1.8s Time] [2021-11-21 00:35:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-21 00:35:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 197. [2021-11-21 00:35:53,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 125 states have (on average 1.216) internal successors, (152), 134 states have internal predecessors, (152), 47 states have call successors, (47), 17 states have call predecessors, (47), 24 states have return successors, (84), 45 states have call predecessors, (84), 46 states have call successors, (84) [2021-11-21 00:35:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 283 transitions. [2021-11-21 00:35:53,113 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 283 transitions. Word has length 48 [2021-11-21 00:35:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:53,113 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 283 transitions. [2021-11-21 00:35:53,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 11 states have call successors, (22), 5 states have call predecessors, (22), 9 states have return successors, (22), 10 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-21 00:35:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 283 transitions. [2021-11-21 00:35:53,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 00:35:53,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:53,116 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:53,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:53,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:35:53,332 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:53,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1615843155, now seen corresponding path program 1 times [2021-11-21 00:35:53,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:53,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910411698] [2021-11-21 00:35:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:53,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 00:35:53,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:53,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910411698] [2021-11-21 00:35:53,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910411698] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:53,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256896275] [2021-11-21 00:35:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:53,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:53,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:53,454 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:53,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:35:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:53,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:35:53,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-21 00:35:53,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:35:53,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256896275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:53,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:35:53,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-21 00:35:53,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083573212] [2021-11-21 00:35:53,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:53,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:35:53,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:53,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:35:53,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:35:53,710 INFO L87 Difference]: Start difference. First operand 197 states and 283 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:35:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:53,916 INFO L93 Difference]: Finished difference Result 291 states and 420 transitions. [2021-11-21 00:35:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:35:53,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-11-21 00:35:53,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:53,919 INFO L225 Difference]: With dead ends: 291 [2021-11-21 00:35:53,919 INFO L226 Difference]: Without dead ends: 194 [2021-11-21 00:35:53,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:35:53,921 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 39 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:53,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 174 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:35:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-21 00:35:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-11-21 00:35:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 131 states have internal predecessors, (147), 47 states have call successors, (47), 17 states have call predecessors, (47), 23 states have return successors, (75), 45 states have call predecessors, (75), 46 states have call successors, (75) [2021-11-21 00:35:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 269 transitions. [2021-11-21 00:35:54,015 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 269 transitions. Word has length 52 [2021-11-21 00:35:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:54,016 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 269 transitions. [2021-11-21 00:35:54,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:35:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 269 transitions. [2021-11-21 00:35:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-21 00:35:54,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:54,020 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:54,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-21 00:35:54,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 00:35:54,240 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:54,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1603461069, now seen corresponding path program 1 times [2021-11-21 00:35:54,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:54,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300512390] [2021-11-21 00:35:54,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:54,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-21 00:35:54,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:54,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300512390] [2021-11-21 00:35:54,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300512390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:54,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886347682] [2021-11-21 00:35:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:54,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:54,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:54,366 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:54,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:35:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:54,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 00:35:54,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:35:54,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:35:54,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886347682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:35:54,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:35:54,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-21 00:35:54,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490468499] [2021-11-21 00:35:54,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:35:54,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:35:54,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:35:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:35:54,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:35:54,695 INFO L87 Difference]: Start difference. First operand 194 states and 269 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:35:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:35:54,936 INFO L93 Difference]: Finished difference Result 295 states and 422 transitions. [2021-11-21 00:35:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:35:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2021-11-21 00:35:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:35:54,938 INFO L225 Difference]: With dead ends: 295 [2021-11-21 00:35:54,938 INFO L226 Difference]: Without dead ends: 203 [2021-11-21 00:35:54,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:35:54,940 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 51 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:35:54,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 211 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:35:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-21 00:35:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 190. [2021-11-21 00:35:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 120 states have (on average 1.1833333333333333) internal successors, (142), 127 states have internal predecessors, (142), 47 states have call successors, (47), 17 states have call predecessors, (47), 22 states have return successors, (65), 45 states have call predecessors, (65), 46 states have call successors, (65) [2021-11-21 00:35:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2021-11-21 00:35:54,994 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 56 [2021-11-21 00:35:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:35:54,994 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2021-11-21 00:35:54,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-21 00:35:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2021-11-21 00:35:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-21 00:35:54,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:35:54,996 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:35:55,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:35:55,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:55,210 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:35:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:35:55,210 INFO L85 PathProgramCache]: Analyzing trace with hash -113358028, now seen corresponding path program 1 times [2021-11-21 00:35:55,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:35:55,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295154195] [2021-11-21 00:35:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:55,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:35:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:35:55,309 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:35:55,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295154195] [2021-11-21 00:35:55,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295154195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:35:55,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546571883] [2021-11-21 00:35:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:35:55,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:35:55,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:35:55,310 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:35:55,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:35:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:35:55,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-21 00:35:55,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:35:55,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:55,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:35:55,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:35:55,744 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-21 00:35:55,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 81 [2021-11-21 00:35:55,760 INFO L354 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2021-11-21 00:35:55,760 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 1 case distinctions, treesize of input 104 treesize of output 77 [2021-11-21 00:36:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-21 00:36:11,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:36:16,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546571883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:16,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1349936582] [2021-11-21 00:36:16,464 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2021-11-21 00:36:16,464 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:16,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:16,465 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:16,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:16,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:16,580 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:36:16,581 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 [2021-11-21 00:36:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:16,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 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 [2021-11-21 00:36:18,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:36:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:36:18,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:18,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:36:19,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:36:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:19,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:19,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:19,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:19,157 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:36:19,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:36:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,302 INFO L354 Elim1Store]: treesize reduction 106, result has 30.3 percent of original size [2021-11-21 00:36:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:36:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:36:19,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:36:19,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:36:19,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:19,562 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:36:19,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 19 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 00:36:19,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:36:19,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:36:19,877 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:36:19,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:36:19,906 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:36:19,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 146 [2021-11-21 00:36:19,939 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:36:19,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 140 [2021-11-21 00:36:19,967 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:36:19,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 76 [2021-11-21 00:36:20,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:20,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:36:20,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:20,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:36:20,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:20,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:36:20,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:20,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:36:23,244 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 46 for LOIs [2021-11-21 00:36:30,796 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 33 for LOIs [2021-11-21 00:36:30,891 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:36:31,047 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:36:31,850 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:36:35,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1349936582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:36:35,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:36:35,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 19, 7] total 47 [2021-11-21 00:36:35,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944047045] [2021-11-21 00:36:35,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:36:35,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:36:35,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:36:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:36:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1983, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 00:36:35,253 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:36:36,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:36:36,745 INFO L93 Difference]: Finished difference Result 245 states and 327 transitions. [2021-11-21 00:36:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:36:36,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2021-11-21 00:36:36,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:36:36,748 INFO L225 Difference]: With dead ends: 245 [2021-11-21 00:36:36,748 INFO L226 Difference]: Without dead ends: 190 [2021-11-21 00:36:36,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=211, Invalid=2339, Unknown=0, NotChecked=0, Total=2550 [2021-11-21 00:36:36,750 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:36:36,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 174 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 412 Invalid, 0 Unknown, 89 Unchecked, 0.7s Time] [2021-11-21 00:36:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-21 00:36:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-11-21 00:36:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 120 states have (on average 1.175) internal successors, (141), 127 states have internal predecessors, (141), 47 states have call successors, (47), 17 states have call predecessors, (47), 22 states have return successors, (65), 45 states have call predecessors, (65), 46 states have call successors, (65) [2021-11-21 00:36:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 253 transitions. [2021-11-21 00:36:36,807 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 253 transitions. Word has length 60 [2021-11-21 00:36:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:36:36,808 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 253 transitions. [2021-11-21 00:36:36,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:36:36,827 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 253 transitions. [2021-11-21 00:36:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-21 00:36:36,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:36:36,829 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:36:36,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-21 00:36:37,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:36:37,043 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:36:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:36:37,044 INFO L85 PathProgramCache]: Analyzing trace with hash -129172476, now seen corresponding path program 1 times [2021-11-21 00:36:37,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:36:37,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616299772] [2021-11-21 00:36:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:37,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:36:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 00:36:37,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:36:37,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616299772] [2021-11-21 00:36:37,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616299772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:36:37,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482143714] [2021-11-21 00:36:37,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:36:37,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:36:37,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:36:37,158 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:36:37,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:36:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:36:37,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 00:36:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:36:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:36:37,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:36:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-21 00:36:37,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482143714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:36:37,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640773603] [2021-11-21 00:36:37,802 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:36:37,802 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:36:37,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:36:37,803 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:36:37,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:36:37,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:37,905 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 00:36:37,905 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 58 [2021-11-21 00:36:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:38,087 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:36:38,087 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 [2021-11-21 00:36:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:36:40,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:36:40,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:36:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:36:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:36:40,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:40,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:41,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:41,053 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:36:41,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:36:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:36:41,254 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-21 00:36:41,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:36:41,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,466 INFO L354 Elim1Store]: treesize reduction 106, result has 30.3 percent of original size [2021-11-21 00:36:41,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:36:41,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:36:41,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:41,743 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:36:41,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 00:36:41,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:36:41,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:36:42,058 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:36:42,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:36:42,088 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:36:42,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 138 [2021-11-21 00:36:42,113 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:36:42,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 86 [2021-11-21 00:36:42,131 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:36:42,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 42 [2021-11-21 00:36:42,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:42,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:36:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:42,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:36:42,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:42,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:36:42,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:36:42,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:36:48,689 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 45 for LOIs [2021-11-21 00:36:48,921 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 21 for LOIs [2021-11-21 00:36:55,748 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 21 for LOIs [2021-11-21 00:36:55,774 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:36:55,874 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:36:56,388 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:37:00,571 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:37:00,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:37:00,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2021-11-21 00:37:00,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278234385] [2021-11-21 00:37:00,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:37:00,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:37:00,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:37:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:37:00,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2021-11-21 00:37:00,574 INFO L87 Difference]: Start difference. First operand 190 states and 253 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-21 00:37:00,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:37:00,824 INFO L93 Difference]: Finished difference Result 290 states and 411 transitions. [2021-11-21 00:37:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:37:00,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2021-11-21 00:37:00,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:37:00,827 INFO L225 Difference]: With dead ends: 290 [2021-11-21 00:37:00,827 INFO L226 Difference]: Without dead ends: 205 [2021-11-21 00:37:00,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 00:37:00,830 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:37:00,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 526 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:37:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-11-21 00:37:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2021-11-21 00:37:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 122 states have (on average 1.1639344262295082) internal successors, (142), 130 states have internal predecessors, (142), 47 states have call successors, (47), 17 states have call predecessors, (47), 23 states have return successors, (72), 45 states have call predecessors, (72), 46 states have call successors, (72) [2021-11-21 00:37:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 261 transitions. [2021-11-21 00:37:00,880 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 261 transitions. Word has length 63 [2021-11-21 00:37:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:37:00,880 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 261 transitions. [2021-11-21 00:37:00,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-21 00:37:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 261 transitions. [2021-11-21 00:37:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-21 00:37:00,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:37:00,882 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:37:00,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 00:37:01,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:01,094 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:37:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:37:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1966738942, now seen corresponding path program 1 times [2021-11-21 00:37:01,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:37:01,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265613942] [2021-11-21 00:37:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:01,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:37:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-21 00:37:01,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:37:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265613942] [2021-11-21 00:37:01,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265613942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:37:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499198488] [2021-11-21 00:37:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:37:01,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:37:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:37:01,198 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:37:01,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:37:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:37:01,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-21 00:37:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:37:01,446 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:37:01,447 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-21 00:37:01,474 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-21 00:37:01,474 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-21 00:37:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:37:16,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:37:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:37:16,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499198488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:37:16,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667833501] [2021-11-21 00:37:16,959 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:37:16,959 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:37:16,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:37:16,960 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:37:16,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:37:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:17,034 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 00:37:17,034 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 58 [2021-11-21 00:37:17,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:17,215 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:37:17,215 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 [2021-11-21 00:37:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:37:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:37:19,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:37:19,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:37:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,700 INFO L354 Elim1Store]: treesize reduction 74, result has 38.3 percent of original size [2021-11-21 00:37:19,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 74 [2021-11-21 00:37:19,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:37:19,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:19,957 INFO L354 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2021-11-21 00:37:19,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 23 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:37:20,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:37:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:37:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:20,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:37:20,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:20,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:20,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:20,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:20,788 INFO L354 Elim1Store]: treesize reduction 268, result has 24.9 percent of original size [2021-11-21 00:37:20,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 425 treesize of output 453 [2021-11-21 00:37:21,045 INFO L354 Elim1Store]: treesize reduction 60, result has 61.3 percent of original size [2021-11-21 00:37:21,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 510 treesize of output 591 [2021-11-21 00:37:21,338 INFO L354 Elim1Store]: treesize reduction 108, result has 48.8 percent of original size [2021-11-21 00:37:21,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 591 treesize of output 681 [2021-11-21 00:37:21,421 INFO L354 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2021-11-21 00:37:21,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 675 treesize of output 658 [2021-11-21 00:37:21,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 655 treesize of output 642 [2021-11-21 00:37:21,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:21,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:21,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:21,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:37:21,757 INFO L354 Elim1Store]: treesize reduction 364, result has 21.7 percent of original size [2021-11-21 00:37:21,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 636 treesize of output 652 [2021-11-21 00:37:21,850 INFO L354 Elim1Store]: treesize reduction 71, result has 21.1 percent of original size [2021-11-21 00:37:21,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 628 [2021-11-21 00:37:34,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:37:34,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:37:34,740 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:37:34,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:37:34,774 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:37:34,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 132 [2021-11-21 00:37:34,809 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:37:34,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 86 [2021-11-21 00:37:34,834 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:37:34,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-21 00:37:34,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:34,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:37:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:34,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:37:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:35,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:35,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:37:35,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:37:35,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:37:41,354 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2021-11-21 00:37:41,565 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2021-11-21 00:37:48,218 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:37:48,271 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:37:48,385 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:37:49,119 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:38:04,631 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:38:04,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:38:04,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19, 14] total 36 [2021-11-21 00:38:04,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65407204] [2021-11-21 00:38:04,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:38:04,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-21 00:38:04,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:04,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-21 00:38:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=3722, Unknown=9, NotChecked=0, Total=4032 [2021-11-21 00:38:04,634 INFO L87 Difference]: Start difference. First operand 193 states and 261 transitions. Second operand has 36 states, 31 states have (on average 3.096774193548387) internal successors, (96), 33 states have internal predecessors, (96), 16 states have call successors, (26), 5 states have call predecessors, (26), 11 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-21 00:38:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:09,181 INFO L93 Difference]: Finished difference Result 357 states and 504 transitions. [2021-11-21 00:38:09,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-21 00:38:09,182 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 3.096774193548387) internal successors, (96), 33 states have internal predecessors, (96), 16 states have call successors, (26), 5 states have call predecessors, (26), 11 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) Word has length 65 [2021-11-21 00:38:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:09,185 INFO L225 Difference]: With dead ends: 357 [2021-11-21 00:38:09,185 INFO L226 Difference]: Without dead ends: 254 [2021-11-21 00:38:09,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 146 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=498, Invalid=6801, Unknown=11, NotChecked=0, Total=7310 [2021-11-21 00:38:09,190 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:09,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 873 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 318 Invalid, 0 Unknown, 149 Unchecked, 0.3s Time] [2021-11-21 00:38:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-21 00:38:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 212. [2021-11-21 00:38:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 136 states have (on average 1.1470588235294117) internal successors, (156), 143 states have internal predecessors, (156), 49 states have call successors, (49), 21 states have call predecessors, (49), 26 states have return successors, (60), 47 states have call predecessors, (60), 48 states have call successors, (60) [2021-11-21 00:38:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 265 transitions. [2021-11-21 00:38:09,272 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 265 transitions. Word has length 65 [2021-11-21 00:38:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:09,273 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 265 transitions. [2021-11-21 00:38:09,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 3.096774193548387) internal successors, (96), 33 states have internal predecessors, (96), 16 states have call successors, (26), 5 states have call predecessors, (26), 11 states have return successors, (26), 13 states have call predecessors, (26), 16 states have call successors, (26) [2021-11-21 00:38:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 265 transitions. [2021-11-21 00:38:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-21 00:38:09,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:09,275 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:09,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:09,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:09,489 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:09,489 INFO L85 PathProgramCache]: Analyzing trace with hash -421048184, now seen corresponding path program 1 times [2021-11-21 00:38:09,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:09,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491900703] [2021-11-21 00:38:09,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:09,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 00:38:09,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:09,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491900703] [2021-11-21 00:38:09,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491900703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526033963] [2021-11-21 00:38:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:09,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:09,932 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:09,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:38:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:10,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-21 00:38:10,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:10,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:10,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-21 00:38:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:10,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:10,321 INFO L354 Elim1Store]: treesize reduction 68, result has 29.2 percent of original size [2021-11-21 00:38:10,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 48 [2021-11-21 00:38:13,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:13,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:13,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:13,062 INFO L354 Elim1Store]: treesize reduction 176, result has 0.6 percent of original size [2021-11-21 00:38:13,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 92 treesize of output 50 [2021-11-21 00:38:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-21 00:38:13,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:38:18,907 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 3302 treesize of output 3270 [2021-11-21 00:38:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 00:38:19,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526033963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:38:19,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730051640] [2021-11-21 00:38:19,689 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:38:19,689 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:38:19,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:38:19,690 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:38:19,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:38:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:19,769 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 00:38:19,769 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 58 [2021-11-21 00:38:19,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:19,917 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:38:19,917 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 [2021-11-21 00:38:21,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:21,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:38:22,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:38:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:38:22,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:38:22,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:22,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:22,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:38:22,421 INFO L354 Elim1Store]: treesize reduction 46, result has 31.3 percent of original size [2021-11-21 00:38:22,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 91 treesize of output 103 [2021-11-21 00:38:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:38:22,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,635 INFO L354 Elim1Store]: treesize reduction 106, result has 30.3 percent of original size [2021-11-21 00:38:22,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 47 treesize of output 85 [2021-11-21 00:38:22,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:38:22,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:38:22,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:22,967 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-21 00:38:22,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 54 [2021-11-21 00:38:23,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:38:23,287 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:38:23,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 120 [2021-11-21 00:38:23,335 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:38:23,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 132 [2021-11-21 00:38:23,374 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-21 00:38:23,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 86 [2021-11-21 00:38:23,405 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-21 00:38:23,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 54 [2021-11-21 00:38:23,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:38:23,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:23,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:23,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2021-11-21 00:38:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:23,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-11-21 00:38:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:23,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:38:23,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:38:23,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:38:31,345 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2021-11-21 00:38:31,615 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 32 for LOIs [2021-11-21 00:38:37,742 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:38:37,793 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:38:37,905 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:38:38,589 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:38:45,166 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:38:45,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:38:45,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 32 [2021-11-21 00:38:45,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954693646] [2021-11-21 00:38:45,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:38:45,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-21 00:38:45,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:38:45,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-21 00:38:45,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3297, Unknown=3, NotChecked=0, Total=3540 [2021-11-21 00:38:45,169 INFO L87 Difference]: Start difference. First operand 212 states and 265 transitions. Second operand has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-21 00:38:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:38:46,673 INFO L93 Difference]: Finished difference Result 380 states and 507 transitions. [2021-11-21 00:38:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:38:46,673 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) Word has length 68 [2021-11-21 00:38:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:38:46,676 INFO L225 Difference]: With dead ends: 380 [2021-11-21 00:38:46,676 INFO L226 Difference]: Without dead ends: 306 [2021-11-21 00:38:46,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=370, Invalid=4739, Unknown=3, NotChecked=0, Total=5112 [2021-11-21 00:38:46,679 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 205 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:38:46,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 776 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1021 Invalid, 0 Unknown, 286 Unchecked, 0.9s Time] [2021-11-21 00:38:46,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-21 00:38:46,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 249. [2021-11-21 00:38:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 163 states have (on average 1.165644171779141) internal successors, (190), 172 states have internal predecessors, (190), 56 states have call successors, (56), 23 states have call predecessors, (56), 29 states have return successors, (78), 53 states have call predecessors, (78), 55 states have call successors, (78) [2021-11-21 00:38:46,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 324 transitions. [2021-11-21 00:38:46,756 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 324 transitions. Word has length 68 [2021-11-21 00:38:46,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:38:46,756 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 324 transitions. [2021-11-21 00:38:46,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.896551724137931) internal successors, (84), 32 states have internal predecessors, (84), 12 states have call successors, (24), 3 states have call predecessors, (24), 6 states have return successors, (23), 8 states have call predecessors, (23), 12 states have call successors, (23) [2021-11-21 00:38:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 324 transitions. [2021-11-21 00:38:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:38:46,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:38:46,759 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:38:46,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:38:46,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:38:46,983 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:38:46,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:38:46,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1776148813, now seen corresponding path program 1 times [2021-11-21 00:38:46,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:38:46,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996115729] [2021-11-21 00:38:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:46,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:38:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 00:38:47,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:38:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996115729] [2021-11-21 00:38:47,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996115729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:38:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939014685] [2021-11-21 00:38:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:38:47,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:38:47,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:38:47,631 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:38:47,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6e13563-bacf-4e64-866a-f77826a15cca/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:38:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:38:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-21 00:38:47,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:38:47,913 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:38:47,914 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-21 00:38:47,938 INFO L354 Elim1Store]: treesize reduction 31, result has 50.0 percent of original size [2021-11-21 00:38:47,938 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 1 case distinctions, treesize of input 71 treesize of output 54 [2021-11-21 00:39:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:39:10,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:39:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 00:39:30,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939014685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:39:30,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637206256] [2021-11-21 00:39:30,675 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2021-11-21 00:39:30,675 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:39:30,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:39:30,675 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:39:30,676 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:39:30,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:30,744 INFO L354 Elim1Store]: treesize reduction 44, result has 42.9 percent of original size [2021-11-21 00:39:30,744 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 58 [2021-11-21 00:39:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:30,885 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:39:30,886 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 [2021-11-21 00:39:33,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2021-11-21 00:39:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:39:33,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2021-11-21 00:39:33,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2021-11-21 00:39:33,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2021-11-21 00:39:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-11-21 00:39:33,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2021-11-21 00:39:33,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:39:33,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2021-11-21 00:40:04,160 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 136 for LOIs [2021-11-21 00:40:05,627 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 20 for LOIs [2021-11-21 00:40:10,721 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 24 for LOIs [2021-11-21 00:40:10,775 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2021-11-21 00:40:10,900 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2021-11-21 00:40:11,639 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:40:46,298 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:40:46,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:40:46,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 31, 15] total 59 [2021-11-21 00:40:46,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615811114] [2021-11-21 00:40:46,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:40:46,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-21 00:40:46,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:40:46,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-21 00:40:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=6935, Unknown=9, NotChecked=0, Total=7482 [2021-11-21 00:40:46,303 INFO L87 Difference]: Start difference. First operand 249 states and 324 transitions. Second operand has 59 states, 49 states have (on average 2.204081632653061) internal successors, (108), 50 states have internal predecessors, (108), 19 states have call successors, (30), 5 states have call predecessors, (30), 16 states have return successors, (29), 17 states have call predecessors, (29), 18 states have call successors, (29)