./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_length_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_length_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 53c422310795c2e7f5b0f72e5a73eee871aa1645d7b73c98001e28d2bf239333 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:32:16,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:32:16,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:32:16,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:32:16,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:32:16,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:32:16,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:32:16,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:32:16,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:32:16,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:32:16,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:32:16,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:32:16,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:32:16,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:32:16,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:32:16,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:32:16,454 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:32:16,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:32:16,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:32:16,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:32:16,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:32:16,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:32:16,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:32:16,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:32:16,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:32:16,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:32:16,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:32:16,474 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:32:16,475 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:32:16,476 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:32:16,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:32:16,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:32:16,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:32:16,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:32:16,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:32:16,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:32:16,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:32:16,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:32:16,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:32:16,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:32:16,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:32:16,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:32:16,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:32:16,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:32:16,537 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:32:16,537 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:32:16,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:32:16,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:32:16,548 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:32:16,549 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:32:16,549 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:32:16,549 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:32:16,549 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:32:16,549 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:32:16,550 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:32:16,550 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:32:16,550 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:32:16,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:32:16,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:32:16,551 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:32:16,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:32:16,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:32:16,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:32:16,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:32:16,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:32:16,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:32:16,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:32:16,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:32:16,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:32:16,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:32:16,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:32:16,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:32:16,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:32:16,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:32:16,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:32:16,554 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:32:16,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:32:16,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:32:16,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:32:16,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:32:16,555 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_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53c422310795c2e7f5b0f72e5a73eee871aa1645d7b73c98001e28d2bf239333 [2021-11-25 18:32:16,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:32:16,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:32:16,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:32:16,857 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:32:16,858 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:32:16,859 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_array_list_length_harness.i [2021-11-25 18:32:16,944 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/data/9f4cd5061/8aa5890749fb4166b3bab7e1364863e3/FLAG0e48ef90b [2021-11-25 18:32:17,753 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:32:17,754 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/sv-benchmarks/c/aws-c-common/aws_array_list_length_harness.i [2021-11-25 18:32:17,804 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/data/9f4cd5061/8aa5890749fb4166b3bab7e1364863e3/FLAG0e48ef90b [2021-11-25 18:32:18,261 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/data/9f4cd5061/8aa5890749fb4166b3bab7e1364863e3 [2021-11-25 18:32:18,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:32:18,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:32:18,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:32:18,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:32:18,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:32:18,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:32:18" (1/1) ... [2021-11-25 18:32:18,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2f8f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:18, skipping insertion in model container [2021-11-25 18:32:18,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:32:18" (1/1) ... [2021-11-25 18:32:18,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:32:18,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:32:18,679 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_6e25950f-7239-4fab-a0fb-1a33807fde9e/sv-benchmarks/c/aws-c-common/aws_array_list_length_harness.i[4495,4508] [2021-11-25 18:32:18,687 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_6e25950f-7239-4fab-a0fb-1a33807fde9e/sv-benchmarks/c/aws-c-common/aws_array_list_length_harness.i[4555,4568] [2021-11-25 18:32:19,660 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:32:19,730 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,731 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,732 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,732 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,734 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,749 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,751 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,751 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,753 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,755 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,755 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:19,756 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,093 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:32:20,094 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:32:20,095 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:32:20,096 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:32:20,098 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:32:20,099 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:32:20,099 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:32:20,100 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:32:20,101 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:32:20,102 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:32:20,262 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,269 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:32:20,354 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:32:20,367 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_6e25950f-7239-4fab-a0fb-1a33807fde9e/sv-benchmarks/c/aws-c-common/aws_array_list_length_harness.i[4495,4508] [2021-11-25 18:32:20,368 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_6e25950f-7239-4fab-a0fb-1a33807fde9e/sv-benchmarks/c/aws-c-common/aws_array_list_length_harness.i[4555,4568] [2021-11-25 18:32:20,403 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:32:20,433 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,434 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,435 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,442 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,443 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,460 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,461 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,462 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,463 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,463 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,464 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,499 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:32:20,500 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:32:20,500 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:32:20,502 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:32:20,503 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:32:20,503 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:32:20,504 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:32:20,504 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:32:20,505 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:32:20,505 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:32:20,567 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,573 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:32:20,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:32:20,879 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:32:20,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20 WrapperNode [2021-11-25 18:32:20,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:32:20,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:32:20,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:32:20,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:32:20,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,064 INFO L137 Inliner]: procedures = 690, calls = 1682, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 591 [2021-11-25 18:32:21,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:32:21,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:32:21,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:32:21,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:32:21,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:32:21,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:32:21,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:32:21,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:32:21,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (1/1) ... [2021-11-25 18:32:21,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:32:21,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:32:21,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:32:21,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:32:21,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:32:21,311 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2021-11-25 18:32:21,311 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2021-11-25 18:32:21,312 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2021-11-25 18:32:21,312 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2021-11-25 18:32:21,312 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 18:32:21,312 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 18:32:21,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:32:21,313 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-25 18:32:21,313 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-25 18:32:21,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:32:21,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:32:21,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:32:21,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:32:21,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:32:21,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:32:21,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:32:21,315 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 18:32:21,315 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 18:32:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-25 18:32:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-25 18:32:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-25 18:32:21,316 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-25 18:32:21,316 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2021-11-25 18:32:21,317 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2021-11-25 18:32:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:32:21,317 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:32:21,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:32:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:32:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:32:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-25 18:32:21,318 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-25 18:32:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-25 18:32:21,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-25 18:32:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:32:21,319 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2021-11-25 18:32:21,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2021-11-25 18:32:21,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:32:21,645 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:32:21,647 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:32:22,664 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:32:22,801 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:32:22,801 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:32:22,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:32:22 BoogieIcfgContainer [2021-11-25 18:32:22,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:32:22,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:32:22,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:32:22,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:32:22,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:32:18" (1/3) ... [2021-11-25 18:32:22,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ada2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:32:22, skipping insertion in model container [2021-11-25 18:32:22,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:32:20" (2/3) ... [2021-11-25 18:32:22,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ada2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:32:22, skipping insertion in model container [2021-11-25 18:32:22,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:32:22" (3/3) ... [2021-11-25 18:32:22,814 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_list_length_harness.i [2021-11-25 18:32:22,820 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:32:22,820 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:32:22,887 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:32:22,903 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:32:22,906 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:32:22,934 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 55 states have internal predecessors, (64), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-25 18:32:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 18:32:22,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:22,945 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:32:22,947 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:32:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1440173234, now seen corresponding path program 1 times [2021-11-25 18:32:22,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:22,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217424913] [2021-11-25 18:32:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:22,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 18:32:23,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:32:23,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217424913] [2021-11-25 18:32:23,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217424913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:32:23,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050577016] [2021-11-25 18:32:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:23,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:23,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:32:23,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:32:23,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:32:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:24,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 18:32:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:32:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:32:24,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:32:24,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050577016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:32:24,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:32:24,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-25 18:32:24,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097193673] [2021-11-25 18:32:24,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:32:24,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:32:24,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:32:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:32:24,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:32:24,518 INFO L87 Difference]: Start difference. First operand has 99 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 55 states have internal predecessors, (64), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 18:32:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:25,044 INFO L93 Difference]: Finished difference Result 169 states and 225 transitions. [2021-11-25 18:32:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:32:25,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 56 [2021-11-25 18:32:25,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:25,056 INFO L225 Difference]: With dead ends: 169 [2021-11-25 18:32:25,056 INFO L226 Difference]: Without dead ends: 95 [2021-11-25 18:32:25,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:32:25,063 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 22 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:25,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 359 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:32:25,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-25 18:32:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-25 18:32:25,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 30 states have call successors, (30), 13 states have call predecessors, (30), 13 states have return successors, (30), 28 states have call predecessors, (30), 28 states have call successors, (30) [2021-11-25 18:32:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-11-25 18:32:25,117 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 56 [2021-11-25 18:32:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:32:25,118 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-11-25 18:32:25,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-25 18:32:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-11-25 18:32:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 18:32:25,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:25,122 INFO L514 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:32:25,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:32:25,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 18:32:25,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:32:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1582919181, now seen corresponding path program 1 times [2021-11-25 18:32:25,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:25,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764813848] [2021-11-25 18:32:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:25,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:25,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:32:25,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542066910] [2021-11-25 18:32:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:25,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:25,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:32:25,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:32:25,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:32:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:25,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:32:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:32:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 18:32:26,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:32:26,149 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:32:26,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764813848] [2021-11-25 18:32:26,150 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:32:26,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542066910] [2021-11-25 18:32:26,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542066910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:32:26,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:32:26,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:32:26,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068884576] [2021-11-25 18:32:26,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:32:26,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:32:26,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:32:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:32:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:32:26,154 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-25 18:32:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:32:26,447 INFO L93 Difference]: Finished difference Result 148 states and 179 transitions. [2021-11-25 18:32:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:32:26,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 65 [2021-11-25 18:32:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:32:26,453 INFO L225 Difference]: With dead ends: 148 [2021-11-25 18:32:26,453 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 18:32:26,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:32:26,476 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 22 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:32:26,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 495 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:32:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 18:32:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-25 18:32:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 50 states have (on average 1.1) internal successors, (55), 51 states have internal predecessors, (55), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-25 18:32:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2021-11-25 18:32:26,490 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 65 [2021-11-25 18:32:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:32:26,491 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2021-11-25 18:32:26,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-25 18:32:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2021-11-25 18:32:26,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 18:32:26,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:32:26,495 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:32:26,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:32:26,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:26,720 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:32:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:32:26,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1235168463, now seen corresponding path program 1 times [2021-11-25 18:32:26,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:32:26,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850781551] [2021-11-25 18:32:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:26,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:32:26,800 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:32:26,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288291117] [2021-11-25 18:32:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:32:26,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:32:26,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:32:26,802 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:32:26,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e25950f-7239-4fab-a0fb-1a33807fde9e/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:32:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:32:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2450 conjuncts, 322 conjunts are in the unsatisfiable core [2021-11-25 18:32:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:32:27,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:32:32,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:32,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:32:32,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:32,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 18:32:32,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:32:33,243 INFO L354 Elim1Store]: treesize reduction 53, result has 32.9 percent of original size [2021-11-25 18:32:33,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 53 [2021-11-25 18:32:33,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:32:33,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-25 18:32:33,785 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-25 18:32:33,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-11-25 18:32:45,119 INFO L354 Elim1Store]: treesize reduction 53, result has 32.9 percent of original size [2021-11-25 18:32:45,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 53 [2021-11-25 18:32:45,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:32:45,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:32:45,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-11-25 18:32:45,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:32:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 18:34:02,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:34:02,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 321 treesize of output 309 [2021-11-25 18:34:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:34:02,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 129 [2021-11-25 18:34:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 22 proven. 29 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:34:03,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:34:34,228 WARN L227 SmtUtils]: Spent 29.68s on a formula simplification that was a NOOP. DAG size: 228 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 18:34:55,686 WARN L227 SmtUtils]: Spent 21.45s on a formula simplification that was a NOOP. DAG size: 174 (called from [L 271] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 18:35:53,725 WARN L227 SmtUtils]: Spent 57.99s on a formula simplification. DAG size of input: 401 DAG size of output: 195 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 18:36:31,466 WARN L227 SmtUtils]: Spent 37.74s on a formula simplification that was a NOOP. DAG size: 187 (called from [L 271] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition)