./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_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_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/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_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/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_184e1c21-975d-454d-8b49-cd23c4c31aa7/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 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:59:25,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:59:25,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:59:25,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:59:25,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:59:25,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:59:25,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:59:25,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:59:25,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:59:25,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:59:25,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:59:25,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:59:25,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:59:25,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:59:25,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:59:25,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:59:25,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:59:25,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:59:25,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:59:25,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:59:25,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:59:25,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:59:25,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:59:25,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:59:25,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:59:25,572 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:59:25,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:59:25,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:59:25,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:59:25,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:59:25,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:59:25,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:59:25,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:59:25,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:59:25,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:59:25,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:59:25,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:59:25,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:59:25,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:59:25,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:59:25,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:59:25,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:59:25,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:59:25,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:59:25,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:59:25,649 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:59:25,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:59:25,650 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:59:25,650 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:59:25,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:59:25,651 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:59:25,651 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:59:25,651 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:59:25,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:59:25,651 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:59:25,652 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:59:25,652 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:59:25,652 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:59:25,652 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:59:25,653 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:59:25,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:59:25,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:59:25,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:59:25,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:59:25,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:59:25,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:59:25,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:59:25,662 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:59:25,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:59:25,664 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:59:25,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:59:25,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:59:25,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:59:25,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:59:25,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:59:25,666 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:59:25,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:59:25,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:59:25,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:59:25,668 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:59:25,668 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_184e1c21-975d-454d-8b49-cd23c4c31aa7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fce72e4c86270281dd05ead367908aebeea58cd11d1d4da51b0e6a5af67a67d [2021-11-21 00:59:25,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:59:26,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:59:26,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:59:26,022 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:59:26,023 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:59:26,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-11-21 00:59:26,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/data/c7d2a91ac/888448f171dc465e876b818473dd1a55/FLAGc23da2f59 [2021-11-21 00:59:27,180 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:59:27,181 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i [2021-11-21 00:59:27,234 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/data/c7d2a91ac/888448f171dc465e876b818473dd1a55/FLAGc23da2f59 [2021-11-21 00:59:27,495 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/data/c7d2a91ac/888448f171dc465e876b818473dd1a55 [2021-11-21 00:59:27,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:59:27,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:59:27,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:59:27,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:59:27,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:59:27,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:59:27" (1/1) ... [2021-11-21 00:59:27,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109cab9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:27, skipping insertion in model container [2021-11-21 00:59:27,507 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:59:27" (1/1) ... [2021-11-21 00:59:27,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:59:27,658 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:59:27,968 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_184e1c21-975d-454d-8b49-cd23c4c31aa7/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2021-11-21 00:59:27,975 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_184e1c21-975d-454d-8b49-cd23c4c31aa7/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2021-11-21 00:59:28,969 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:28,970 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:28,971 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:28,972 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:28,974 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:29,011 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:29,012 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:29,019 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:29,020 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:29,461 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:59:29,463 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:59:29,464 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:59:29,465 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:59:29,466 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:59:29,467 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:59:29,468 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:59:29,469 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:59:29,469 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:59:29,470 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:59:29,680 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:59:29,702 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:29,704 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:29,860 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:29,861 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:29,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:59:30,003 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:59:30,031 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_184e1c21-975d-454d-8b49-cd23c4c31aa7/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4503,4516] [2021-11-21 00:59:30,037 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_184e1c21-975d-454d-8b49-cd23c4c31aa7/sv-benchmarks/c/aws-c-common/aws_byte_buf_reserve_relative_harness.i[4563,4576] [2021-11-21 00:59:30,096 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,097 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,097 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,098 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,099 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,106 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,107 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,108 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,109 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,142 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:59:30,143 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:59:30,144 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:59:30,144 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:59:30,146 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:59:30,146 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:59:30,147 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:59:30,147 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:59:30,148 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:59:30,148 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:59:30,169 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:59:30,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,218 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,218 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:59:30,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:59:30,551 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:59:30,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30 WrapperNode [2021-11-21 00:59:30,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:59:30,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:59:30,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:59:30,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:59:30,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,822 INFO L137 Inliner]: procedures = 692, calls = 2500, calls flagged for inlining = 57, calls inlined = 12, statements flattened = 1003 [2021-11-21 00:59:30,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:59:30,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:59:30,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:59:30,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:59:30,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:59:30,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:59:30,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:59:30,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:59:30,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (1/1) ... [2021-11-21 00:59:30,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:59:30,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:31,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:59:31,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:59:31,059 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-21 00:59:31,060 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-21 00:59:31,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:59:31,061 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 00:59:31,061 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 00:59:31,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:59:31,062 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-21 00:59:31,062 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-21 00:59:31,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:59:31,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:59:31,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:59:31,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:59:31,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:59:31,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:59:31,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:59:31,064 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 00:59:31,065 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 00:59:31,065 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_realloc [2021-11-21 00:59:31,065 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_realloc [2021-11-21 00:59:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-21 00:59:31,066 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-21 00:59:31,066 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:59:31,066 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:59:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:59:31,067 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-21 00:59:31,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-21 00:59:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:59:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:59:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 00:59:31,068 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 00:59:31,068 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-21 00:59:31,069 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-21 00:59:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:59:31,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:59:31,409 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:59:31,411 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:59:33,193 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:59:33,411 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:59:33,411 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-21 00:59:33,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:59:33 BoogieIcfgContainer [2021-11-21 00:59:33,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:59:33,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:59:33,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:59:33,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:59:33,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:59:27" (1/3) ... [2021-11-21 00:59:33,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4530f87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:59:33, skipping insertion in model container [2021-11-21 00:59:33,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:59:30" (2/3) ... [2021-11-21 00:59:33,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4530f87b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:59:33, skipping insertion in model container [2021-11-21 00:59:33,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:59:33" (3/3) ... [2021-11-21 00:59:33,431 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reserve_relative_harness.i [2021-11-21 00:59:33,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:59:33,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:59:33,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:59:33,501 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:59:33,502 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:59:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 72 states have internal predecessors, (95), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-21 00:59:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 00:59:33,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:33,530 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:33,530 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1580795549, now seen corresponding path program 1 times [2021-11-21 00:59:33,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:33,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875912510] [2021-11-21 00:59:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:33,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:59:34,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:34,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875912510] [2021-11-21 00:59:34,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875912510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:59:34,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:59:34,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:59:34,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605555083] [2021-11-21 00:59:34,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:59:34,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:59:34,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:34,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:59:34,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:59:34,340 INFO L87 Difference]: Start difference. First operand has 122 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 72 states have internal predecessors, (95), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 00:59:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:35,676 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2021-11-21 00:59:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:59:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 33 [2021-11-21 00:59:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:35,690 INFO L225 Difference]: With dead ends: 235 [2021-11-21 00:59:35,690 INFO L226 Difference]: Without dead ends: 124 [2021-11-21 00:59:35,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:59:35,697 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 5 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:35,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 715 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-21 00:59:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-21 00:59:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-11-21 00:59:35,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 73 states have internal predecessors, (87), 38 states have call successors, (38), 11 states have call predecessors, (38), 11 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-21 00:59:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 162 transitions. [2021-11-21 00:59:35,755 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 162 transitions. Word has length 33 [2021-11-21 00:59:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:35,756 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 162 transitions. [2021-11-21 00:59:35,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 00:59:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 162 transitions. [2021-11-21 00:59:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-21 00:59:35,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:35,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:35,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:59:35,759 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:35,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1848825383, now seen corresponding path program 1 times [2021-11-21 00:59:35,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:35,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670774954] [2021-11-21 00:59:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:35,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:59:39,522 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:39,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670774954] [2021-11-21 00:59:39,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670774954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:59:39,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253646924] [2021-11-21 00:59:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:39,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:39,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:39,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:39,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:59:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:40,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 2405 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-21 00:59:40,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:59:40,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 00:59:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:59:49,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:59:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253646924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:59:49,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:59:49,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [11] total 23 [2021-11-21 00:59:49,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690433103] [2021-11-21 00:59:49,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:59:49,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 00:59:49,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:49,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 00:59:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-21 00:59:49,963 INFO L87 Difference]: Start difference. First operand 122 states and 162 transitions. Second operand has 16 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 00:59:52,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:52,656 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2021-11-21 00:59:52,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:59:52,657 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 36 [2021-11-21 00:59:52,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:52,660 INFO L225 Difference]: With dead ends: 150 [2021-11-21 00:59:52,660 INFO L226 Difference]: Without dead ends: 134 [2021-11-21 00:59:52,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:59:52,663 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 34 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:52,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1585 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 233 Invalid, 0 Unknown, 270 Unchecked, 2.6s Time] [2021-11-21 00:59:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-21 00:59:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2021-11-21 00:59:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 74 states have internal predecessors, (87), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-21 00:59:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2021-11-21 00:59:52,686 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 36 [2021-11-21 00:59:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:52,686 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2021-11-21 00:59:52,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-21 00:59:52,687 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2021-11-21 00:59:52,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 00:59:52,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:52,689 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:52,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:59:52,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:52,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:52,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:52,915 INFO L85 PathProgramCache]: Analyzing trace with hash -971205567, now seen corresponding path program 1 times [2021-11-21 00:59:52,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:52,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575152609] [2021-11-21 00:59:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:52,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:59:53,168 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:53,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575152609] [2021-11-21 00:59:53,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575152609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:59:53,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:59:53,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:59:53,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983154937] [2021-11-21 00:59:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:59:53,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:59:53,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:59:53,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:59:53,172 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 00:59:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:54,600 INFO L93 Difference]: Finished difference Result 146 states and 185 transitions. [2021-11-21 00:59:54,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:59:54,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 38 [2021-11-21 00:59:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:54,604 INFO L225 Difference]: With dead ends: 146 [2021-11-21 00:59:54,604 INFO L226 Difference]: Without dead ends: 128 [2021-11-21 00:59:54,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:59:54,606 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 3 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:54,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 688 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-21 00:59:54,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-21 00:59:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2021-11-21 00:59:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 73 states have (on average 1.1917808219178083) internal successors, (87), 74 states have internal predecessors, (87), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-21 00:59:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2021-11-21 00:59:54,625 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 38 [2021-11-21 00:59:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:54,626 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2021-11-21 00:59:54,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-21 00:59:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2021-11-21 00:59:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 00:59:54,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:54,628 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:54,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:59:54,629 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:54,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1272715639, now seen corresponding path program 1 times [2021-11-21 00:59:54,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:54,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870683672] [2021-11-21 00:59:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:54,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 00:59:55,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:55,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870683672] [2021-11-21 00:59:55,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870683672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:59:55,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:59:55,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 00:59:55,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094917642] [2021-11-21 00:59:55,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:59:55,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:59:55,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:59:55,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:59:55,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:59:55,538 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:59:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:59:56,820 INFO L93 Difference]: Finished difference Result 235 states and 306 transitions. [2021-11-21 00:59:56,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:59:56,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 41 [2021-11-21 00:59:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:59:56,823 INFO L225 Difference]: With dead ends: 235 [2021-11-21 00:59:56,823 INFO L226 Difference]: Without dead ends: 124 [2021-11-21 00:59:56,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:59:56,826 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 58 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:59:56,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 632 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-21 00:59:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-21 00:59:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-21 00:59:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 73 states have (on average 1.178082191780822) internal successors, (86), 74 states have internal predecessors, (86), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-21 00:59:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 159 transitions. [2021-11-21 00:59:56,849 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 159 transitions. Word has length 41 [2021-11-21 00:59:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:59:56,850 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 159 transitions. [2021-11-21 00:59:56,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:59:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 159 transitions. [2021-11-21 00:59:56,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 00:59:56,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:59:56,853 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:59:56,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:59:56,853 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:59:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:59:56,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1020634721, now seen corresponding path program 1 times [2021-11-21 00:59:56,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:59:56,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552000495] [2021-11-21 00:59:56,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:56,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:59:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:59:59,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 00:59:59,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:59:59,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552000495] [2021-11-21 00:59:59,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552000495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:59:59,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390966857] [2021-11-21 00:59:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:59:59,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:59:59,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:59:59,766 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:59:59,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_184e1c21-975d-454d-8b49-cd23c4c31aa7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:00:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:00,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 2433 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-21 01:00:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:00,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 01:00:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:00:11,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:14,290 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2021-11-21 01:07:50,433 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.