./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_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_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/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_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/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_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/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 f6da3aa04741dedcde0205dc04a8136a445ebd58b30adbc60377ecda455d64bb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:14:19,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:14:19,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:14:19,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:14:19,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:14:19,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:14:19,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:14:19,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:14:19,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:14:19,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:14:19,256 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:14:19,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:14:19,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:14:19,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:14:19,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:14:19,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:14:19,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:14:19,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:14:19,271 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:14:19,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:14:19,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:14:19,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:14:19,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:14:19,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:14:19,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:14:19,289 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:14:19,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:14:19,291 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:14:19,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:14:19,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:14:19,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:14:19,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:14:19,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:14:19,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:14:19,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:14:19,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:14:19,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:14:19,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:14:19,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:14:19,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:14:19,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:14:19,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:14:19,345 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:14:19,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:14:19,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:14:19,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:14:19,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:14:19,348 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:14:19,348 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:14:19,348 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:14:19,349 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:14:19,349 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:14:19,349 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:14:19,350 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:14:19,350 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:14:19,350 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:14:19,350 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:14:19,351 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:14:19,351 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:14:19,351 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:14:19,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:14:19,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:14:19,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:14:19,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:14:19,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:14:19,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:14:19,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:14:19,355 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:14:19,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:14:19,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:14:19,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:14:19,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:14:19,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:14:19,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:14:19,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:14:19,357 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:14:19,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:14:19,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:14:19,358 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:14:19,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:14:19,359 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_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6da3aa04741dedcde0205dc04a8136a445ebd58b30adbc60377ecda455d64bb [2021-11-21 00:14:19,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:14:19,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:14:19,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:14:19,673 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:14:19,674 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:14:19,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i [2021-11-21 00:14:19,761 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/data/ee4ba96f2/f4175f1d6cd94e59b72a40855010962e/FLAGee4a844bc [2021-11-21 00:14:20,843 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:14:20,845 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i [2021-11-21 00:14:20,901 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/data/ee4ba96f2/f4175f1d6cd94e59b72a40855010962e/FLAGee4a844bc [2021-11-21 00:14:21,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/data/ee4ba96f2/f4175f1d6cd94e59b72a40855010962e [2021-11-21 00:14:21,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:14:21,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:14:21,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:14:21,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:14:21,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:14:21,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:14:21" (1/1) ... [2021-11-21 00:14:21,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d3c617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:21, skipping insertion in model container [2021-11-21 00:14:21,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:14:21" (1/1) ... [2021-11-21 00:14:21,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:14:21,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:14:21,749 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_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i[4499,4512] [2021-11-21 00:14:21,762 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_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i[4559,4572] [2021-11-21 00:14:23,060 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:23,062 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:23,062 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:23,074 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:23,075 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:23,100 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:23,101 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:23,103 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:23,104 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:23,651 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:14:23,653 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:14:23,654 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:14:23,656 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:14:23,658 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:14:23,659 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:14:23,660 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:14:23,660 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:14:23,661 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:14:23,662 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:14:23,876 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:14:24,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,177 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:14:24,239 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:14:24,256 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_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i[4499,4512] [2021-11-21 00:14:24,257 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_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/sv-benchmarks/c/aws-c-common/aws_byte_cursor_read_be16_harness.i[4559,4572] [2021-11-21 00:14:24,310 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,312 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,313 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,323 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,323 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,365 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:14:24,366 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:14:24,367 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:14:24,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:14:24,369 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:14:24,370 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:14:24,371 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:14:24,371 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:14:24,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:14:24,373 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:14:24,412 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:14:24,582 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,582 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:24,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:14:25,111 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:14:25,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25 WrapperNode [2021-11-21 00:14:25,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:14:25,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:14:25,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:14:25,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:14:25,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,474 INFO L137 Inliner]: procedures = 691, calls = 2645, calls flagged for inlining = 61, calls inlined = 11, statements flattened = 975 [2021-11-21 00:14:25,475 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:14:25,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:14:25,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:14:25,477 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:14:25,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:14:25,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:14:25,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:14:25,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:14:25,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:14:25,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:25,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:14:25,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:14:25,796 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_read [2021-11-21 00:14:25,796 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_read [2021-11-21 00:14:25,797 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-21 00:14:25,797 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-21 00:14:25,797 INFO L130 BoogieDeclarations]: Found specification of procedure ntohs [2021-11-21 00:14:25,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:14:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 00:14:25,798 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 00:14:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2021-11-21 00:14:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 00:14:25,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 00:14:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:14:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 00:14:25,799 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 00:14:25,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:14:25,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:14:25,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:14:25,800 INFO L130 BoogieDeclarations]: Found specification of procedure aws_ntoh16 [2021-11-21 00:14:25,800 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_ntoh16 [2021-11-21 00:14:25,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:14:25,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:14:25,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:14:25,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:14:25,801 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 00:14:25,801 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 00:14:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-21 00:14:25,802 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-21 00:14:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 00:14:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 00:14:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-21 00:14:25,803 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-21 00:14:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:14:25,803 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:14:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:14:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:14:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:14:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 00:14:25,804 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 00:14:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:14:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~real [2021-11-21 00:14:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:14:26,138 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:14:26,140 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:14:27,845 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:14:28,050 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:14:28,050 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:14:28,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:14:28 BoogieIcfgContainer [2021-11-21 00:14:28,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:14:28,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:14:28,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:14:28,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:14:28,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:14:21" (1/3) ... [2021-11-21 00:14:28,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bf79f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:14:28, skipping insertion in model container [2021-11-21 00:14:28,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25" (2/3) ... [2021-11-21 00:14:28,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64bf79f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:14:28, skipping insertion in model container [2021-11-21 00:14:28,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:14:28" (3/3) ... [2021-11-21 00:14:28,066 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_read_be16_harness.i [2021-11-21 00:14:28,073 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:14:28,073 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:14:28,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:14:28,154 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 00:14:28,158 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:14:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-21 00:14:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-21 00:14:28,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:28,202 INFO L514 BasicCegarLoop]: trace histogram [9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:28,205 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash 138425425, now seen corresponding path program 1 times [2021-11-21 00:14:28,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:28,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034101958] [2021-11-21 00:14:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:28,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-21 00:14:29,732 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:29,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034101958] [2021-11-21 00:14:29,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034101958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:29,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:14:29,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:14:29,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851793677] [2021-11-21 00:14:29,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:29,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:14:29,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:29,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:14:29,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:14:29,776 INFO L87 Difference]: Start difference. First operand has 126 states, 65 states have (on average 1.2) internal successors, (78), 66 states have internal predecessors, (78), 48 states have call successors, (48), 11 states have call predecessors, (48), 11 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:14:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:30,291 INFO L93 Difference]: Finished difference Result 221 states and 323 transitions. [2021-11-21 00:14:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:14:30,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 82 [2021-11-21 00:14:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:30,308 INFO L225 Difference]: With dead ends: 221 [2021-11-21 00:14:30,309 INFO L226 Difference]: Without dead ends: 127 [2021-11-21 00:14:30,314 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 [2021-11-21 00:14:30,318 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 4 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:30,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 457 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:14:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-21 00:14:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-11-21 00:14:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 68 states have internal predecessors, (80), 48 states have call successors, (48), 11 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2021-11-21 00:14:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 176 transitions. [2021-11-21 00:14:30,415 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 176 transitions. Word has length 82 [2021-11-21 00:14:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:30,416 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 176 transitions. [2021-11-21 00:14:30,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:14:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 176 transitions. [2021-11-21 00:14:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-21 00:14:30,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:30,424 INFO L514 BasicCegarLoop]: trace histogram [9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:30,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:14:30,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -667433464, now seen corresponding path program 1 times [2021-11-21 00:14:30,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:30,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120347079] [2021-11-21 00:14:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:30,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-21 00:14:31,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:31,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120347079] [2021-11-21 00:14:31,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120347079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:31,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504647908] [2021-11-21 00:14:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:31,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:31,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:31,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:31,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:14:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:32,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:14:32,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-21 00:14:32,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-21 00:14:32,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504647908] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:32,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:14:32,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2021-11-21 00:14:32,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069956662] [2021-11-21 00:14:32,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:32,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:14:32,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:32,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:14:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:14:32,741 INFO L87 Difference]: Start difference. First operand 127 states and 176 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:14:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:33,188 INFO L93 Difference]: Finished difference Result 226 states and 318 transitions. [2021-11-21 00:14:33,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:14:33,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 83 [2021-11-21 00:14:33,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:33,193 INFO L225 Difference]: With dead ends: 226 [2021-11-21 00:14:33,193 INFO L226 Difference]: Without dead ends: 132 [2021-11-21 00:14:33,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:14:33,197 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 4 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:33,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 303 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:14:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-21 00:14:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-11-21 00:14:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 70 states have internal predecessors, (83), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2021-11-21 00:14:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2021-11-21 00:14:33,225 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 83 [2021-11-21 00:14:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:33,226 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2021-11-21 00:14:33,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:14:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2021-11-21 00:14:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-21 00:14:33,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:33,229 INFO L514 BasicCegarLoop]: trace histogram [9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:33,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:33,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:33,458 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:33,459 INFO L85 PathProgramCache]: Analyzing trace with hash -458977165, now seen corresponding path program 1 times [2021-11-21 00:14:33,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:33,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728618689] [2021-11-21 00:14:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:33,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:33,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-21 00:14:34,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728618689] [2021-11-21 00:14:34,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728618689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009220289] [2021-11-21 00:14:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:34,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:34,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:34,090 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:34,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:14:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 2696 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-21 00:14:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:35,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:14:35,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-21 00:14:37,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:37,240 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:14:37,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-11-21 00:14:37,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:37,251 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:14:37,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2021-11-21 00:14:37,498 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 20 treesize of output 12 [2021-11-21 00:14:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-21 00:14:37,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:14:37,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009220289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:37,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:14:37,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [10] total 20 [2021-11-21 00:14:37,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263928465] [2021-11-21 00:14:37,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:37,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 00:14:37,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 00:14:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:14:37,741 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand has 12 states, 7 states have (on average 4.714285714285714) internal successors, (33), 9 states have internal predecessors, (33), 7 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-21 00:14:38,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:38,966 INFO L93 Difference]: Finished difference Result 242 states and 334 transitions. [2021-11-21 00:14:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:14:38,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 4.714285714285714) internal successors, (33), 9 states have internal predecessors, (33), 7 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 84 [2021-11-21 00:14:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:38,970 INFO L225 Difference]: With dead ends: 242 [2021-11-21 00:14:38,970 INFO L226 Difference]: Without dead ends: 130 [2021-11-21 00:14:38,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-21 00:14:38,973 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 71 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:38,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 679 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 329 Invalid, 0 Unknown, 54 Unchecked, 1.0s Time] [2021-11-21 00:14:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-21 00:14:38,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-21 00:14:38,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 70 states have internal predecessors, (82), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2021-11-21 00:14:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 178 transitions. [2021-11-21 00:14:38,999 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 178 transitions. Word has length 84 [2021-11-21 00:14:38,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:39,000 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 178 transitions. [2021-11-21 00:14:39,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 4.714285714285714) internal successors, (33), 9 states have internal predecessors, (33), 7 states have call successors, (21), 3 states have call predecessors, (21), 4 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2021-11-21 00:14:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 178 transitions. [2021-11-21 00:14:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-21 00:14:39,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:39,003 INFO L514 BasicCegarLoop]: trace histogram [10, 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, 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 00:14:39,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 00:14:39,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:39,230 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:39,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1810788004, now seen corresponding path program 1 times [2021-11-21 00:14:39,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:39,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500654153] [2021-11-21 00:14:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:39,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-21 00:14:39,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:39,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500654153] [2021-11-21 00:14:39,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500654153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:39,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128761877] [2021-11-21 00:14:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:39,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:39,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:39,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:39,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95e5e4a5-ba5f-4867-90a6-e8f735aa7d6e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:14:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2727 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-21 00:14:40,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:40,895 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 00:14:44,019 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 35 treesize of output 27 [2021-11-21 00:14:44,024 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 24 treesize of output 16 [2021-11-21 00:14:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 00:14:44,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:46,643 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2021-11-21 00:15:12,480 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.