./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_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_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/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_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/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_4c5b5763-2b3b-471e-be50-4ec195f1b407/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 caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:39:00,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:39:00,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:39:00,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:39:00,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:39:00,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:39:00,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:39:00,656 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:39:00,658 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:39:00,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:39:00,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:39:00,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:39:00,663 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:39:00,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:39:00,666 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:39:00,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:39:00,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:39:00,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:39:00,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:39:00,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:39:00,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:39:00,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:39:00,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:39:00,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:39:00,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:39:00,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:39:00,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:39:00,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:39:00,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:39:00,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:39:00,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:39:00,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:39:00,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:39:00,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:39:00,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:39:00,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:39:00,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:39:00,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:39:00,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:39:00,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:39:00,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:39:00,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:39:00,729 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:39:00,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:39:00,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:39:00,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:39:00,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:39:00,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:39:00,731 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:39:00,731 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:39:00,732 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:39:00,732 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:39:00,733 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:39:00,733 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:39:00,733 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:39:00,733 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:39:00,734 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:39:00,734 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:39:00,734 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:39:00,734 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:39:00,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:39:00,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:39:00,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:39:00,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:39:00,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:39:00,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:39:00,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:39:00,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:39:00,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:39:00,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:39:00,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:39:00,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:39:00,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:39:00,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:39:00,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:39:00,738 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:39:00,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:39:00,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:39:00,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:39:00,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:39:00,739 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_4c5b5763-2b3b-471e-be50-4ec195f1b407/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> caa9ea3c4b01be424b9d4542ff8acdcb39307db8022d65ba85a629a6a4ef591a [2021-11-25 18:39:01,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:39:01,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:39:01,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:39:01,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:39:01,062 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:39:01,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2021-11-25 18:39:01,131 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/data/67b690c58/89beb3eeb2bf4c57ad5121d52407236e/FLAGcba5fd0ad [2021-11-25 18:39:02,112 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:39:02,115 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i [2021-11-25 18:39:02,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/data/67b690c58/89beb3eeb2bf4c57ad5121d52407236e/FLAGcba5fd0ad [2021-11-25 18:39:02,487 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/data/67b690c58/89beb3eeb2bf4c57ad5121d52407236e [2021-11-25 18:39:02,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:39:02,491 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:39:02,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:39:02,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:39:02,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:39:02,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:39:02" (1/1) ... [2021-11-25 18:39:02,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e2a4f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:02, skipping insertion in model container [2021-11-25 18:39:02,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:39:02" (1/1) ... [2021-11-25 18:39:02,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:39:02,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:39:03,021 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_4c5b5763-2b3b-471e-be50-4ec195f1b407/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2021-11-25 18:39:03,030 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_4c5b5763-2b3b-471e-be50-4ec195f1b407/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2021-11-25 18:39:04,166 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:04,167 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:04,168 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:04,169 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:04,170 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:04,188 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:04,188 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:04,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:04,192 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:04,712 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:39:04,714 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:39:04,715 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:39:04,717 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:39:04,719 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:39:04,720 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:39:04,720 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:39:04,721 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:39:04,722 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:39:04,723 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:39:04,946 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:39:05,191 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,200 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:39:05,522 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:39:05,539 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_4c5b5763-2b3b-471e-be50-4ec195f1b407/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4499,4512] [2021-11-25 18:39:05,540 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_4c5b5763-2b3b-471e-be50-4ec195f1b407/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_cursor_harness.i[4559,4572] [2021-11-25 18:39:05,582 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,583 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,583 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,584 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,585 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,592 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,593 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,594 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,595 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,642 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:39:05,643 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:39:05,644 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:39:05,645 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:39:05,647 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:39:05,647 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:39:05,648 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:39:05,649 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:39:05,649 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:39:05,650 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:39:05,673 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:39:05,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:39:05,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:39:06,125 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:39:06,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06 WrapperNode [2021-11-25 18:39:06,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:39:06,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:39:06,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:39:06,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:39:06,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,298 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,423 INFO L137 Inliner]: procedures = 693, calls = 2789, calls flagged for inlining = 60, calls inlined = 7, statements flattened = 869 [2021-11-25 18:39:06,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:39:06,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:39:06,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:39:06,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:39:06,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:39:06,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:39:06,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:39:06,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:39:06,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (1/1) ... [2021-11-25 18:39:06,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:39:06,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:06,620 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:39:06,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:39:06,681 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2021-11-25 18:39:06,681 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2021-11-25 18:39:06,682 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-25 18:39:06,682 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-25 18:39:06,683 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2021-11-25 18:39:06,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2021-11-25 18:39:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 18:39:06,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:39:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 18:39:06,685 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 18:39:06,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:39:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:39:06,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:39:06,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:39:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:39:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:39:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:39:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:39:06,687 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 18:39:06,687 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 18:39:06,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:39:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:39:06,689 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:39:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:39:06,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:39:06,690 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-11-25 18:39:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-11-25 18:39:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:39:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-25 18:39:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-25 18:39:06,691 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 18:39:06,691 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 18:39:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:39:06,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:39:07,051 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:39:07,053 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:39:08,708 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:39:08,897 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:39:08,902 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:39:08,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:39:08 BoogieIcfgContainer [2021-11-25 18:39:08,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:39:08,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:39:08,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:39:08,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:39:08,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:39:02" (1/3) ... [2021-11-25 18:39:08,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf1dcac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:39:08, skipping insertion in model container [2021-11-25 18:39:08,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:39:06" (2/3) ... [2021-11-25 18:39:08,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bf1dcac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:39:08, skipping insertion in model container [2021-11-25 18:39:08,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:39:08" (3/3) ... [2021-11-25 18:39:08,916 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_cursor_harness.i [2021-11-25 18:39:08,923 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:39:08,923 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:39:08,997 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:39:09,014 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 18:39:09,014 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:39:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-25 18:39:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:39:09,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:09,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:09,055 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:39:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1141148069, now seen corresponding path program 1 times [2021-11-25 18:39:09,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:09,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284767134] [2021-11-25 18:39:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:09,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 18:39:09,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284767134] [2021-11-25 18:39:09,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284767134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:39:09,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:39:09,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:39:09,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643602861] [2021-11-25 18:39:09,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:39:09,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:39:09,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:39:09,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:39:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:39:09,995 INFO L87 Difference]: Start difference. First operand has 92 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 52 states have internal predecessors, (64), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 18:39:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:39:10,259 INFO L93 Difference]: Finished difference Result 157 states and 217 transitions. [2021-11-25 18:39:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:39:10,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2021-11-25 18:39:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:39:10,276 INFO L225 Difference]: With dead ends: 157 [2021-11-25 18:39:10,276 INFO L226 Difference]: Without dead ends: 119 [2021-11-25 18:39:10,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:39:10,289 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 12 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:39:10,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 336 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:39:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-25 18:39:10,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-11-25 18:39:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 68 states have internal predecessors, (84), 39 states have call successors, (39), 10 states have call predecessors, (39), 10 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2021-11-25 18:39:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 161 transitions. [2021-11-25 18:39:10,387 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 161 transitions. Word has length 42 [2021-11-25 18:39:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:39:10,388 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 161 transitions. [2021-11-25 18:39:10,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 18:39:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 161 transitions. [2021-11-25 18:39:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-25 18:39:10,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:39:10,394 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:39:10,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:39:10,395 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:39:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:39:10,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2093931912, now seen corresponding path program 1 times [2021-11-25 18:39:10,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:39:10,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156769233] [2021-11-25 18:39:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:10,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:39:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:39:11,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:39:11,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156769233] [2021-11-25 18:39:11,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156769233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:39:11,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464885864] [2021-11-25 18:39:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:39:11,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:39:11,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:39:11,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:39:11,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5b5763-2b3b-471e-be50-4ec195f1b407/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:39:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:39:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 2470 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-25 18:39:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:39:12,574 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 18:39:12,583 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 18:39:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:39:18,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:39:19,391 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2021-11-25 18:39:34,267 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.