./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_new_from_array_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_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/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_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_new_from_array_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/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_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/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 364b54724e976c015f9881f66521e5c6d863e13e3a8324ac15c0186b650523fa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:13:45,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:13:45,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:13:45,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:13:45,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:13:45,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:13:45,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:13:45,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:13:45,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:13:45,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:13:45,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:13:45,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:13:45,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:13:45,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:13:45,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:13:45,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:13:45,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:13:45,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:13:45,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:13:45,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:13:45,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:13:46,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:13:46,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:13:46,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:13:46,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:13:46,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:13:46,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:13:46,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:13:46,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:13:46,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:13:46,019 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:13:46,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:13:46,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:13:46,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:13:46,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:13:46,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:13:46,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:13:46,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:13:46,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:13:46,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:13:46,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:13:46,027 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:13:46,054 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:13:46,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:13:46,054 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:13:46,054 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:13:46,055 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:13:46,055 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:13:46,056 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:13:46,056 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:13:46,056 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:13:46,056 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:13:46,056 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:13:46,057 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:13:46,057 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:13:46,057 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:13:46,057 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:13:46,057 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:13:46,058 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:13:46,058 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:13:46,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:13:46,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:13:46,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:13:46,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:13:46,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:13:46,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:13:46,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:13:46,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:13:46,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:13:46,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:13:46,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:13:46,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:46,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:13:46,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:13:46,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:13:46,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:13:46,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:13:46,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:13:46,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:13:46,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:13:46,063 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_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 364b54724e976c015f9881f66521e5c6d863e13e3a8324ac15c0186b650523fa [2021-11-20 23:13:46,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:13:46,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:13:46,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:13:46,488 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:13:46,489 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:13:46,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_string_new_from_array_harness.i [2021-11-20 23:13:46,560 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/data/0d55451db/f4532da55a374536b43f3c8f0b69fa77/FLAG9ae1eb449 [2021-11-20 23:13:47,394 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:13:47,395 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/sv-benchmarks/c/aws-c-common/aws_string_new_from_array_harness.i [2021-11-20 23:13:47,453 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/data/0d55451db/f4532da55a374536b43f3c8f0b69fa77/FLAG9ae1eb449 [2021-11-20 23:13:47,910 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/data/0d55451db/f4532da55a374536b43f3c8f0b69fa77 [2021-11-20 23:13:47,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:13:47,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:13:47,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:47,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:13:47,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:13:47,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6de29a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:47, skipping insertion in model container [2021-11-20 23:13:47,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:13:47" (1/1) ... [2021-11-20 23:13:47,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:13:48,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:13:48,398 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_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/sv-benchmarks/c/aws-c-common/aws_string_new_from_array_harness.i[4499,4512] [2021-11-20 23:13:48,406 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_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/sv-benchmarks/c/aws-c-common/aws_string_new_from_array_harness.i[4559,4572] [2021-11-20 23:13:49,313 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:49,314 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:49,315 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:49,316 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:49,317 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:49,333 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:49,334 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:49,336 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:49,337 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:49,825 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:13:49,827 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:13:49,828 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:13:49,830 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:13:49,831 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:13:49,832 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:13:49,833 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:13:49,834 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:13:49,835 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:13:49,835 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:13:50,057 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:13:50,164 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,164 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:50,348 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:13:50,362 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_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/sv-benchmarks/c/aws-c-common/aws_string_new_from_array_harness.i[4499,4512] [2021-11-20 23:13:50,363 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_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/sv-benchmarks/c/aws-c-common/aws_string_new_from_array_harness.i[4559,4572] [2021-11-20 23:13:50,408 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,409 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,409 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,410 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,411 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,425 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,425 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,427 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,427 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,463 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:13:50,464 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:13:50,464 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:13:50,465 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:13:50,466 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:13:50,466 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:13:50,467 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:13:50,467 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:13:50,468 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:13:50,468 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:13:50,495 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:13:50,584 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,584 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:13:50,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:13:51,007 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:13:51,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51 WrapperNode [2021-11-20 23:13:51,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:13:51,009 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:51,009 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:13:51,009 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:13:51,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,239 INFO L137 Inliner]: procedures = 690, calls = 2737, calls flagged for inlining = 58, calls inlined = 6, statements flattened = 793 [2021-11-20 23:13:51,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:13:51,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:13:51,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:13:51,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:13:51,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:13:51,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:13:51,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:13:51,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:13:51,362 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (1/1) ... [2021-11-20 23:13:51,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:13:51,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:51,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:13:51,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:13:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2021-11-20 23:13:51,477 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2021-11-20 23:13:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:13:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 23:13:51,479 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 23:13:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-20 23:13:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-20 23:13:51,481 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-20 23:13:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:13:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:13:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:13:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:13:51,482 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:13:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 23:13:51,482 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 23:13:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:13:51,483 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:13:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:13:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:13:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:13:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:13:51,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:13:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 23:13:51,485 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 23:13:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_size_t [2021-11-20 23:13:51,485 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_size_t [2021-11-20 23:13:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:13:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:13:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-20 23:13:51,486 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-20 23:13:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:13:51,487 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:13:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-11-20 23:13:51,487 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-11-20 23:13:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:13:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-20 23:13:51,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-20 23:13:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:13:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_new_from_array [2021-11-20 23:13:51,488 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_new_from_array [2021-11-20 23:13:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 23:13:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 23:13:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-20 23:13:51,489 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-20 23:13:51,489 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 23:13:51,490 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 23:13:51,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:13:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-20 23:13:51,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:13:51,756 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:13:51,759 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:13:52,026 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume !true; [2021-11-20 23:13:53,566 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:13:53,710 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:13:53,710 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:13:53,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:53 BoogieIcfgContainer [2021-11-20 23:13:53,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:13:53,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:13:53,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:13:53,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:13:53,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:13:47" (1/3) ... [2021-11-20 23:13:53,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32adcc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:53, skipping insertion in model container [2021-11-20 23:13:53,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:13:51" (2/3) ... [2021-11-20 23:13:53,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32adcc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:13:53, skipping insertion in model container [2021-11-20 23:13:53,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:13:53" (3/3) ... [2021-11-20 23:13:53,728 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_string_new_from_array_harness.i [2021-11-20 23:13:53,740 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:13:53,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:13:53,816 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:13:53,833 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 [2021-11-20 23:13:53,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:13:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-20 23:13:53,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 23:13:53,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:53,879 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-20 23:13:53,887 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:53,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1018121587, now seen corresponding path program 1 times [2021-11-20 23:13:53,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:53,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978102894] [2021-11-20 23:13:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:53,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 23:13:54,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:54,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978102894] [2021-11-20 23:13:54,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978102894] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:54,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:54,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:13:54,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913377148] [2021-11-20 23:13:54,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:54,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:13:54,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:54,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:13:54,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:54,689 INFO L87 Difference]: Start difference. First operand has 109 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-20 23:13:54,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:54,922 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2021-11-20 23:13:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:13:54,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 54 [2021-11-20 23:13:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:54,938 INFO L225 Difference]: With dead ends: 148 [2021-11-20 23:13:54,938 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 23:13:54,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:54,945 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:54,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 460 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 23:13:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-20 23:13:55,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 33 states have call successors, (33), 16 states have call predecessors, (33), 17 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2021-11-20 23:13:55,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 134 transitions. [2021-11-20 23:13:55,012 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 134 transitions. Word has length 54 [2021-11-20 23:13:55,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:55,014 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 134 transitions. [2021-11-20 23:13:55,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-20 23:13:55,015 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 134 transitions. [2021-11-20 23:13:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 23:13:55,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:55,018 INFO L514 BasicCegarLoop]: trace histogram [5, 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] [2021-11-20 23:13:55,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:13:55,019 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:55,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1414451221, now seen corresponding path program 1 times [2021-11-20 23:13:55,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:55,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419223170] [2021-11-20 23:13:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:55,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 23:13:55,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:55,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419223170] [2021-11-20 23:13:55,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419223170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:55,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:55,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:13:55,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922803584] [2021-11-20 23:13:55,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:55,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:13:55,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:13:55,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:55,329 INFO L87 Difference]: Start difference. First operand 110 states and 134 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 23:13:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:55,507 INFO L93 Difference]: Finished difference Result 141 states and 169 transitions. [2021-11-20 23:13:55,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:13:55,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 58 [2021-11-20 23:13:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:55,512 INFO L225 Difference]: With dead ends: 141 [2021-11-20 23:13:55,513 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 23:13:55,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:13:55,519 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:55,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 450 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 23:13:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-11-20 23:13:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 56 states have (on average 1.125) internal successors, (63), 57 states have internal predecessors, (63), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-20 23:13:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2021-11-20 23:13:55,548 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 58 [2021-11-20 23:13:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:55,548 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2021-11-20 23:13:55,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-20 23:13:55,550 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2021-11-20 23:13:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 23:13:55,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:55,559 INFO L514 BasicCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:55,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:13:55,560 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:55,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:55,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1146342054, now seen corresponding path program 1 times [2021-11-20 23:13:55,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:55,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307768128] [2021-11-20 23:13:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:55,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 23:13:55,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:55,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307768128] [2021-11-20 23:13:55,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307768128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:55,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:55,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:13:55,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815215296] [2021-11-20 23:13:55,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:55,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:13:55,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:55,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:13:55,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:55,901 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 23:13:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:56,038 INFO L93 Difference]: Finished difference Result 156 states and 187 transitions. [2021-11-20 23:13:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:13:56,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 89 [2021-11-20 23:13:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:56,042 INFO L225 Difference]: With dead ends: 156 [2021-11-20 23:13:56,042 INFO L226 Difference]: Without dead ends: 112 [2021-11-20 23:13:56,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:13:56,045 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 3 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:56,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 550 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:13:56,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-20 23:13:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-11-20 23:13:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 33 states have call successors, (33), 16 states have call predecessors, (33), 17 states have return successors, (33), 33 states have call predecessors, (33), 32 states have call successors, (33) [2021-11-20 23:13:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2021-11-20 23:13:56,060 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 89 [2021-11-20 23:13:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:56,060 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2021-11-20 23:13:56,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-20 23:13:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2021-11-20 23:13:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 23:13:56,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:56,063 INFO L514 BasicCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:56,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:13:56,063 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash 879882711, now seen corresponding path program 1 times [2021-11-20 23:13:56,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:56,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237605083] [2021-11-20 23:13:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:56,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 23:13:56,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:56,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237605083] [2021-11-20 23:13:56,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237605083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:13:56,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:13:56,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 23:13:56,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025545830] [2021-11-20 23:13:56,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:13:56,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:13:56,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:13:56,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:13:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:13:56,356 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-20 23:13:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:13:56,553 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2021-11-20 23:13:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:13:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 93 [2021-11-20 23:13:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:13:56,556 INFO L225 Difference]: With dead ends: 154 [2021-11-20 23:13:56,556 INFO L226 Difference]: Without dead ends: 104 [2021-11-20 23:13:56,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:13:56,558 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 1 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:13:56,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 872 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 23:13:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-20 23:13:56,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-20 23:13:56,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-20 23:13:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2021-11-20 23:13:56,575 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 93 [2021-11-20 23:13:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:13:56,577 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2021-11-20 23:13:56,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-20 23:13:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2021-11-20 23:13:56,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-20 23:13:56,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:13:56,620 INFO L514 BasicCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:13:56,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:13:56,620 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:13:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:13:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2047562133, now seen corresponding path program 1 times [2021-11-20 23:13:56,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:13:56,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840947007] [2021-11-20 23:13:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:56,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:13:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 23:13:57,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:13:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840947007] [2021-11-20 23:13:57,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840947007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:13:57,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875038256] [2021-11-20 23:13:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:13:57,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:13:57,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:13:57,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:13:57,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:13:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:13:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 2660 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-20 23:13:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:14:02,851 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:14:03,284 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-20 23:14:03,285 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 23:14:04,863 INFO L354 Elim1Store]: treesize reduction 53, result has 13.1 percent of original size [2021-11-20 23:14:04,864 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 67 [2021-11-20 23:14:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 23:14:05,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:26,020 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 26 treesize of output 24 [2021-11-20 23:16:26,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:26,041 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 149 treesize of output 137 [2021-11-20 23:16:26,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:26,062 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 149 treesize of output 137 [2021-11-20 23:16:26,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-20 23:16:27,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875038256] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:27,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:16:27,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21, 32] total 67 [2021-11-20 23:16:27,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320005619] [2021-11-20 23:16:27,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:27,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 23:16:27,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:27,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 23:16:27,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4191, Unknown=38, NotChecked=0, Total=4422 [2021-11-20 23:16:27,957 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand has 21 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (21), 6 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-20 23:16:36,910 WARN L227 SmtUtils]: Spent 7.71s on a formula simplification. DAG size of input: 155 DAG size of output: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:16:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:46,579 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2021-11-20 23:16:46,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 23:16:46,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (21), 6 states have call predecessors, (21), 3 states have call successors, (21) Word has length 97 [2021-11-20 23:16:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:46,582 INFO L225 Difference]: With dead ends: 119 [2021-11-20 23:16:46,582 INFO L226 Difference]: Without dead ends: 117 [2021-11-20 23:16:46,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=232, Invalid=5130, Unknown=40, NotChecked=0, Total=5402 [2021-11-20 23:16:46,586 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 12 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:46,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1534 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 455 Invalid, 0 Unknown, 164 Unchecked, 1.6s Time] [2021-11-20 23:16:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-20 23:16:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2021-11-20 23:16:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 63 states have internal predecessors, (68), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2021-11-20 23:16:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 136 transitions. [2021-11-20 23:16:46,601 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 136 transitions. Word has length 97 [2021-11-20 23:16:46,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:46,602 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 136 transitions. [2021-11-20 23:16:46,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 4 states have call successors, (23), 3 states have call predecessors, (23), 6 states have return successors, (21), 6 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-20 23:16:46,602 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 136 transitions. [2021-11-20 23:16:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 23:16:46,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:46,604 INFO L514 BasicCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:46,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:46,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:46,826 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1116862849, now seen corresponding path program 1 times [2021-11-20 23:16:46,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:46,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833080779] [2021-11-20 23:16:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:46,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 23:16:47,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:47,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833080779] [2021-11-20 23:16:47,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833080779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:47,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342541359] [2021-11-20 23:16:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:47,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:47,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:47,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:47,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:16:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:16:47,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 23:16:47,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 23:16:48,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342541359] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:48,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:16:48,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2021-11-20 23:16:48,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181823599] [2021-11-20 23:16:48,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:48,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:16:48,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:48,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:16:48,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:48,306 INFO L87 Difference]: Start difference. First operand 114 states and 136 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 23:16:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:48,596 INFO L93 Difference]: Finished difference Result 151 states and 180 transitions. [2021-11-20 23:16:48,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:16:48,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 98 [2021-11-20 23:16:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:48,600 INFO L225 Difference]: With dead ends: 151 [2021-11-20 23:16:48,600 INFO L226 Difference]: Without dead ends: 115 [2021-11-20 23:16:48,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:48,602 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 2 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:48,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 212 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:16:48,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-20 23:16:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-11-20 23:16:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 64 states have internal predecessors, (69), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2021-11-20 23:16:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 137 transitions. [2021-11-20 23:16:48,615 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 137 transitions. Word has length 98 [2021-11-20 23:16:48,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:48,616 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 137 transitions. [2021-11-20 23:16:48,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 23:16:48,617 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 137 transitions. [2021-11-20 23:16:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 23:16:48,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:48,618 INFO L514 BasicCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:48,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:48,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 23:16:48,846 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:48,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:48,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1517809853, now seen corresponding path program 1 times [2021-11-20 23:16:48,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:48,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630578663] [2021-11-20 23:16:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:48,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-20 23:16:49,042 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:49,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630578663] [2021-11-20 23:16:49,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630578663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:49,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:49,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:16:49,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955580384] [2021-11-20 23:16:49,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:49,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:16:49,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:49,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:16:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:16:49,044 INFO L87 Difference]: Start difference. First operand 115 states and 137 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 23:16:49,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:49,403 INFO L93 Difference]: Finished difference Result 152 states and 181 transitions. [2021-11-20 23:16:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:16:49,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 98 [2021-11-20 23:16:49,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:49,405 INFO L225 Difference]: With dead ends: 152 [2021-11-20 23:16:49,405 INFO L226 Difference]: Without dead ends: 115 [2021-11-20 23:16:49,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:49,406 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 3 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:49,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 312 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:16:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-20 23:16:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-11-20 23:16:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 62 states have (on average 1.096774193548387) internal successors, (68), 64 states have internal predecessors, (68), 34 states have call successors, (34), 17 states have call predecessors, (34), 18 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2021-11-20 23:16:49,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2021-11-20 23:16:49,427 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 98 [2021-11-20 23:16:49,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:49,429 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2021-11-20 23:16:49,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 23:16:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2021-11-20 23:16:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 23:16:49,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:49,431 INFO L514 BasicCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:49,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:16:49,432 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2090084077, now seen corresponding path program 1 times [2021-11-20 23:16:49,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:49,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810623172] [2021-11-20 23:16:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:49,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 23:16:50,551 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:50,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810623172] [2021-11-20 23:16:50,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810623172] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:50,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405582485] [2021-11-20 23:16:50,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:50,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:50,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:50,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:50,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eed27bd0-85e2-4c71-8d7d-b8292c6e4802/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:16:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:51,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2715 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-20 23:16:51,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:54,453 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 13 treesize of output 9 [2021-11-20 23:17:35,011 INFO L354 Elim1Store]: treesize reduction 103, result has 22.6 percent of original size [2021-11-20 23:17:35,011 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 2 case distinctions, treesize of input 60 treesize of output 56 [2021-11-20 23:17:35,294 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 23:17:35,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 90 [2021-11-20 23:17:35,353 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 23:17:35,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 49 [2021-11-20 23:17:39,711 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_ULTIMATE.start_aws_string_new_from_array_harness_~alloc_size~2#1_125| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 23:17:39,856 INFO L354 Elim1Store]: treesize reduction 93, result has 7.9 percent of original size [2021-11-20 23:17:39,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 145 [2021-11-20 23:17:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-20 23:17:40,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:18:06,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405582485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:18:06,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [567338315] [2021-11-20 23:18:06,253 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2021-11-20 23:18:06,254 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:18:06,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:18:06,266 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:18:06,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs