./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:04:13,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:04:13,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:04:13,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:04:13,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:04:13,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:04:13,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:04:13,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:04:13,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:04:13,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:04:13,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:04:13,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:04:13,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:04:13,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:04:13,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:04:13,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:04:13,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:04:13,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:04:13,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:04:13,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:04:13,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:04:13,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:04:13,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:04:13,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:04:13,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:04:13,609 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:04:13,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:04:13,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:04:13,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:04:13,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:04:13,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:04:13,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:04:13,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:04:13,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:04:13,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:04:13,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:04:13,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:04:13,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:04:13,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:04:13,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:04:13,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:04:13,627 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:04:13,677 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:04:13,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:04:13,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:04:13,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:04:13,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:04:13,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:04:13,687 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:04:13,687 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:04:13,687 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:04:13,687 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:04:13,689 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:04:13,689 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:04:13,689 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:04:13,689 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:04:13,690 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:04:13,690 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:04:13,690 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:04:13,690 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:04:13,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:04:13,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:04:13,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:04:13,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:04:13,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:04:13,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:04:13,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:04:13,693 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:04:13,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:04:13,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:04:13,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:04:13,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:04:13,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:04:13,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:04:13,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:04:13,697 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:04:13,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:04:13,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:04:13,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:04:13,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:04:13,698 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_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60926facf5511174d61dcd6a0b7a731efc9ccdb495bc26b58400da4cd6320ca0 [2021-11-25 18:04:14,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:04:14,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:04:14,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:04:14,117 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:04:14,118 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:04:14,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-25 18:04:14,196 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/data/b94f822f8/63be33ae9243469f8cadde3c79c87a42/FLAG97e1f66c0 [2021-11-25 18:04:15,166 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:04:15,168 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i [2021-11-25 18:04:15,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/data/b94f822f8/63be33ae9243469f8cadde3c79c87a42/FLAG97e1f66c0 [2021-11-25 18:04:15,626 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/data/b94f822f8/63be33ae9243469f8cadde3c79c87a42 [2021-11-25 18:04:15,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:04:15,632 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:04:15,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:04:15,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:04:15,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:04:15,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:04:15" (1/1) ... [2021-11-25 18:04:15,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4202fdbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:15, skipping insertion in model container [2021-11-25 18:04:15,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:04:15" (1/1) ... [2021-11-25 18:04:15,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:04:15,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:04:16,216 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_ecb1254e-66cf-4175-936d-655a91150728/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-25 18:04:16,227 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_ecb1254e-66cf-4175-936d-655a91150728/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-25 18:04:17,700 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:17,701 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:17,702 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:17,703 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:17,704 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:17,719 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:17,720 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:17,722 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:17,722 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,180 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:04:18,182 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:04:18,183 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:04:18,184 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:04:18,186 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:04:18,187 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:04:18,188 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:04:18,189 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:04:18,189 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:04:18,190 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:04:18,402 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:04:18,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:04:18,698 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:04:18,713 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_ecb1254e-66cf-4175-936d-655a91150728/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4505,4518] [2021-11-25 18:04:18,714 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_ecb1254e-66cf-4175-936d-655a91150728/sv-benchmarks/c/aws-c-common/aws_byte_cursor_compare_lexical_harness.i[4565,4578] [2021-11-25 18:04:18,776 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,777 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,778 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,778 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,779 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,787 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,788 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,789 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,789 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,830 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:04:18,831 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:04:18,832 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:04:18,833 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:04:18,835 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:04:18,836 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:04:18,836 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:04:18,837 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:04:18,841 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:04:18,842 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:04:18,881 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:04:18,995 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:18,996 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:04:19,054 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:04:19,524 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:04:19,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19 WrapperNode [2021-11-25 18:04:19,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:04:19,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:04:19,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:04:19,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:04:19,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,750 INFO L137 Inliner]: procedures = 691, calls = 2656, calls flagged for inlining = 59, calls inlined = 6, statements flattened = 925 [2021-11-25 18:04:19,751 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:04:19,752 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:04:19,752 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:04:19,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:04:19,761 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:04:19,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:04:19,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:04:19,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:04:19,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (1/1) ... [2021-11-25 18:04:19,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:04:19,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:19,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:04:19,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:04:19,975 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-25 18:04:19,975 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-25 18:04:19,976 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_compare_lexical [2021-11-25 18:04:19,977 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_compare_lexical [2021-11-25 18:04:19,977 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 18:04:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:04:19,978 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 18:04:19,979 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 18:04:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:04:19,979 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_bounded [2021-11-25 18:04:19,979 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_bounded [2021-11-25 18:04:19,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:04:19,980 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:04:19,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:04:19,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:04:19,981 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-25 18:04:19,981 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-25 18:04:19,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:04:19,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:04:19,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:04:19,982 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 18:04:19,983 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 18:04:19,983 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-25 18:04:19,984 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-25 18:04:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:04:19,984 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:04:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:04:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:04:19,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:04:20,001 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 18:04:20,002 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 18:04:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:04:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-25 18:04:20,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_cursor_has_allocated_buffer_member [2021-11-25 18:04:20,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:04:20,305 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:04:20,327 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:04:21,911 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:04:22,130 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:04:22,131 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:04:22,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:04:22 BoogieIcfgContainer [2021-11-25 18:04:22,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:04:22,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:04:22,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:04:22,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:04:22,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:04:15" (1/3) ... [2021-11-25 18:04:22,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f4d731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:04:22, skipping insertion in model container [2021-11-25 18:04:22,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:04:19" (2/3) ... [2021-11-25 18:04:22,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70f4d731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:04:22, skipping insertion in model container [2021-11-25 18:04:22,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:04:22" (3/3) ... [2021-11-25 18:04:22,144 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_compare_lexical_harness.i [2021-11-25 18:04:22,188 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:04:22,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:04:22,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:04:22,273 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:04:22,274 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:04:22,305 INFO L276 IsEmpty]: Start isEmpty. Operand has 120 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-25 18:04:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 18:04:22,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:22,319 INFO L514 BasicCegarLoop]: trace histogram [9, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:22,319 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:04:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1241526131, now seen corresponding path program 1 times [2021-11-25 18:04:22,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:22,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70305788] [2021-11-25 18:04:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:22,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-25 18:04:24,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:24,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70305788] [2021-11-25 18:04:24,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70305788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:24,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421674007] [2021-11-25 18:04:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:24,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:24,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:24,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:24,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:04:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:25,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 2676 conjuncts, 134 conjunts are in the unsatisfiable core [2021-11-25 18:04:25,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:25,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-25 18:04:26,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:26,114 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 [2021-11-25 18:04:26,125 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 [2021-11-25 18:04:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 18:04:29,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:29,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421674007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:29,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:04:29,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [20] total 33 [2021-11-25 18:04:29,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443849425] [2021-11-25 18:04:29,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:29,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:04:29,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:04:29,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:04:29,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:04:29,553 INFO L87 Difference]: Start difference. First operand has 120 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 46 states have call successors, (46), 11 states have call predecessors, (46), 11 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 15 states, 8 states have (on average 4.0) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-25 18:04:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:30,105 INFO L93 Difference]: Finished difference Result 243 states and 339 transitions. [2021-11-25 18:04:30,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 18:04:30,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 8 states have (on average 4.0) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 82 [2021-11-25 18:04:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:30,118 INFO L225 Difference]: With dead ends: 243 [2021-11-25 18:04:30,118 INFO L226 Difference]: Without dead ends: 119 [2021-11-25 18:04:30,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:04:30,128 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 38 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:30,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1079 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 242 Invalid, 0 Unknown, 109 Unchecked, 0.4s Time] [2021-11-25 18:04:30,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-25 18:04:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-11-25 18:04:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 46 states have call successors, (46), 11 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2021-11-25 18:04:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 161 transitions. [2021-11-25 18:04:30,187 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 161 transitions. Word has length 82 [2021-11-25 18:04:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:30,187 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 161 transitions. [2021-11-25 18:04:30,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 8 states have (on average 4.0) internal successors, (32), 10 states have internal predecessors, (32), 6 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-11-25 18:04:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 161 transitions. [2021-11-25 18:04:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 18:04:30,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:30,194 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:30,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:30,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 18:04:30,410 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:04:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:30,411 INFO L85 PathProgramCache]: Analyzing trace with hash 107369648, now seen corresponding path program 1 times [2021-11-25 18:04:30,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:04:30,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673507600] [2021-11-25 18:04:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:30,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:04:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-25 18:04:32,035 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:04:32,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673507600] [2021-11-25 18:04:32,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673507600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:04:32,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109986290] [2021-11-25 18:04:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:32,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:32,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:32,041 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:32,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecb1254e-66cf-4175-936d-655a91150728/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:04:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:32,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 2711 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-25 18:04:32,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:32,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-11-25 18:04:33,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:04:34,184 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-25 18:04:34,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2021-11-25 18:04:34,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-11-25 18:04:34,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:04:34,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-11-25 18:04:34,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-11-25 18:04:39,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2021-11-25 18:04:39,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-11-25 18:04:39,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:04:39,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 96 [2021-11-25 18:04:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 13 proven. 58 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-25 18:04:40,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:41,200 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 13430 disjunctions. This might take some time... [2021-11-25 18:04:53,214 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.