./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW --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 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:36:20,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:36:20,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:36:20,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:36:20,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:36:20,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:36:20,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:36:20,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:36:20,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:36:20,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:36:20,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:36:20,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:36:20,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:36:20,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:36:20,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:36:20,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:36:20,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:36:20,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:36:20,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:36:20,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:36:20,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:36:20,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:36:20,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:36:20,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:36:20,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:36:20,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:36:20,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:36:20,676 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:36:20,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:36:20,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:36:20,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:36:20,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:36:20,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:36:20,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:36:20,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:36:20,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:36:20,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:36:20,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:36:20,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:36:20,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:36:20,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:36:20,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 15:36:20,751 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:36:20,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:36:20,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:36:20,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:36:20,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:36:20,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:36:20,754 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:36:20,754 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:36:20,754 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:36:20,754 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:36:20,760 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:36:20,761 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:36:20,761 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:36:20,761 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:36:20,761 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:36:20,762 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:36:20,762 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:36:20,762 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:36:20,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:36:20,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:36:20,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:36:20,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:36:20,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:36:20,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:36:20,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:36:20,766 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:36:20,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:36:20,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:36:20,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:36:20,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:36:20,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:36:20,769 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:36:20,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:36:20,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:36:20,769 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:36:20,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:36:20,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:36:20,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:36:20,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce [2022-11-23 15:36:21,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:36:21,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:36:21,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:36:21,066 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:36:21,067 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:36:21,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2022-11-23 15:36:24,174 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:36:24,726 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:36:24,727 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2022-11-23 15:36:24,768 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/data/07f774509/d3e558d8f75d4cf78f00487eee6f6ebb/FLAG809e0e30c [2022-11-23 15:36:24,783 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/data/07f774509/d3e558d8f75d4cf78f00487eee6f6ebb [2022-11-23 15:36:24,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:36:24,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:36:24,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:36:24,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:36:24,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:36:24,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:24" (1/1) ... [2022-11-23 15:36:24,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b885757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:24, skipping insertion in model container [2022-11-23 15:36:24,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:24" (1/1) ... [2022-11-23 15:36:24,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:36:24,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:36:25,180 WARN L237 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_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2022-11-23 15:36:25,190 WARN L237 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_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2022-11-23 15:36:26,421 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:26,422 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:26,423 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:26,424 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:26,426 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:26,443 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:26,444 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:26,446 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:26,447 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,065 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 15:36:27,066 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 15:36:27,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 15:36:27,070 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 15:36:27,072 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 15:36:27,073 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 15:36:27,074 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 15:36:27,075 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 15:36:27,076 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 15:36:27,077 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 15:36:27,358 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 15:36:27,507 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,508 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:36:27,759 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:36:27,789 WARN L237 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_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2022-11-23 15:36:27,790 WARN L237 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_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2022-11-23 15:36:27,824 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,825 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,825 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,826 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,826 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,833 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,834 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,835 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,835 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,870 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-23 15:36:27,871 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-23 15:36:27,872 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-23 15:36:27,873 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-23 15:36:27,874 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-23 15:36:27,875 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-23 15:36:27,875 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-23 15:36:27,876 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-23 15:36:27,877 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-23 15:36:27,877 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-23 15:36:27,898 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-23 15:36:27,953 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,953 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-23 15:36:27,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:36:28,358 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:36:28,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28 WrapperNode [2022-11-23 15:36:28,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:36:28,361 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:36:28,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:36:28,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:36:28,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,571 INFO L138 Inliner]: procedures = 693, calls = 2791, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 873 [2022-11-23 15:36:28,571 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:36:28,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:36:28,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:36:28,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:36:28,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,631 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:36:28,645 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:36:28,645 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:36:28,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:36:28,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (1/1) ... [2022-11-23 15:36:28,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:36:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:28,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:36:28,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:36:28,736 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2022-11-23 15:36:28,736 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2022-11-23 15:36:28,737 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-23 15:36:28,738 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-23 15:36:28,738 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2022-11-23 15:36:28,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2022-11-23 15:36:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-23 15:36:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:36:28,739 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-23 15:36:28,739 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-23 15:36:28,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:36:28,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:36:28,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:36:28,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:36:28,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:36:28,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 15:36:28,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:36:28,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:36:28,742 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-23 15:36:28,742 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-23 15:36:28,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 15:36:28,743 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 15:36:28,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 15:36:28,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:36:28,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 15:36:28,743 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2022-11-23 15:36:28,744 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2022-11-23 15:36:28,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 15:36:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-23 15:36:28,745 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-23 15:36:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-23 15:36:28,745 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-23 15:36:28,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:36:28,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:36:29,212 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:36:29,214 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:36:30,568 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:36:30,893 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:36:30,894 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 15:36:30,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:30 BoogieIcfgContainer [2022-11-23 15:36:30,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:36:30,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:36:30,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:36:30,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:36:30,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:36:24" (1/3) ... [2022-11-23 15:36:30,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c69a732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:30, skipping insertion in model container [2022-11-23 15:36:30,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:28" (2/3) ... [2022-11-23 15:36:30,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c69a732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:36:30, skipping insertion in model container [2022-11-23 15:36:30,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:36:30" (3/3) ... [2022-11-23 15:36:30,916 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_buf_harness.i [2022-11-23 15:36:30,938 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:36:30,938 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:36:31,017 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:36:31,025 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3dbaf55a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:36:31,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:36:31,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-23 15:36:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 15:36:31,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:31,051 INFO L195 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:31,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:31,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2113904576, now seen corresponding path program 1 times [2022-11-23 15:36:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:31,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910422071] [2022-11-23 15:36:31,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:31,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 15:36:32,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:32,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910422071] [2022-11-23 15:36:32,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910422071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:36:32,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:36:32,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:36:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137662018] [2022-11-23 15:36:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:36:32,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:36:32,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:36:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:36:32,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:36:32,424 INFO L87 Difference]: Start difference. First operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 15:36:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:36:32,721 INFO L93 Difference]: Finished difference Result 161 states and 221 transitions. [2022-11-23 15:36:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:36:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 51 [2022-11-23 15:36:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:36:32,740 INFO L225 Difference]: With dead ends: 161 [2022-11-23 15:36:32,740 INFO L226 Difference]: Without dead ends: 125 [2022-11-23 15:36:32,746 INFO L412 NwaCegarLoop]: 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 [2022-11-23 15:36:32,755 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 12 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:36:32,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 347 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:36:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-23 15:36:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2022-11-23 15:36:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 70 states have internal predecessors, (84), 43 states have call successors, (43), 10 states have call predecessors, (43), 10 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-11-23 15:36:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2022-11-23 15:36:32,851 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 51 [2022-11-23 15:36:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:36:32,852 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2022-11-23 15:36:32,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 15:36:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2022-11-23 15:36:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 15:36:32,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:36:32,858 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:36:32,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:36:32,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:36:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:36:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash -819770497, now seen corresponding path program 1 times [2022-11-23 15:36:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:36:32,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895953460] [2022-11-23 15:36:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:32,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:36:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 15:36:45,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:36:45,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895953460] [2022-11-23 15:36:45,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895953460] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 15:36:45,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344269356] [2022-11-23 15:36:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:36:45,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:36:45,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:36:45,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:36:45,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c7f20e1-c794-4dc0-9fbb-d06454806cb2/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:36:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:36:46,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 2543 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-23 15:36:46,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:36:46,995 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 15:36:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:36:55,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:36:57,632 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-23 15:44:58,483 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.