./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0 --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 f87ca444cebdd8343e0a486129ff23acad574c7cfb073abcacffd6c901ccf3af --- 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-e04fb08 [2022-11-16 20:30:59,712 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:30:59,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:30:59,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:30:59,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:30:59,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:30:59,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:30:59,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:30:59,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:30:59,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:30:59,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:30:59,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:30:59,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:30:59,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:30:59,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:30:59,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:30:59,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:30:59,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:30:59,766 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:30:59,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:30:59,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:30:59,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:30:59,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:30:59,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:30:59,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:30:59,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:30:59,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:30:59,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:30:59,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:30:59,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:30:59,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:30:59,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:30:59,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:30:59,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:30:59,808 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:30:59,808 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:30:59,809 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:30:59,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:30:59,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:30:59,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:30:59,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:30:59,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-16 20:30:59,861 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:30:59,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:30:59,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:30:59,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:30:59,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:30:59,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:30:59,864 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:30:59,864 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:30:59,864 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:30:59,865 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:30:59,866 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:30:59,866 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:30:59,866 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:30:59,867 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:30:59,867 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:30:59,867 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:30:59,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:30:59,868 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:30:59,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:30:59,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:30:59,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:30:59,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:30:59,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:30:59,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:30:59,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:30:59,871 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:30:59,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:30:59,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:30:59,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:30:59,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:30:59,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:30:59,873 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:30:59,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:30:59,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:30:59,874 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:30:59,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:30:59,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:30:59,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:30:59,875 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_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f87ca444cebdd8343e0a486129ff23acad574c7cfb073abcacffd6c901ccf3af [2022-11-16 20:31:00,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:31:00,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:31:00,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:31:00,256 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:31:00,257 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:31:00,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i [2022-11-16 20:31:00,326 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/data/c54ca68ce/50ef9725cb5f419ea5f0752118d6d4fe/FLAG8414ca37f [2022-11-16 20:31:01,229 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:31:01,230 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i [2022-11-16 20:31:01,272 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/data/c54ca68ce/50ef9725cb5f419ea5f0752118d6d4fe/FLAG8414ca37f [2022-11-16 20:31:01,699 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/data/c54ca68ce/50ef9725cb5f419ea5f0752118d6d4fe [2022-11-16 20:31:01,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:31:01,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:31:01,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:31:01,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:31:01,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:31:01,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:31:01" (1/1) ... [2022-11-16 20:31:01,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31fd2b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:01, skipping insertion in model container [2022-11-16 20:31:01,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:31:01" (1/1) ... [2022-11-16 20:31:01,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:31:01,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:31:02,119 WARN L229 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_f28944f0-e65a-4e36-9c6d-1fb015ea6732/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i[4498,4511] [2022-11-16 20:31:02,126 WARN L229 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_f28944f0-e65a-4e36-9c6d-1fb015ea6732/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i[4558,4571] [2022-11-16 20:31:03,101 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,101 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,102 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,103 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,104 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,117 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,117 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,119 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,120 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,498 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 20:31:03,499 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 20:31:03,500 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 20:31:03,502 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 20:31:03,504 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 20:31:03,505 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 20:31:03,505 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 20:31:03,506 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 20:31:03,506 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 20:31:03,507 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 20:31:03,666 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 20:31:03,791 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,791 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:03,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:31:03,922 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:31:03,952 WARN L229 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_f28944f0-e65a-4e36-9c6d-1fb015ea6732/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i[4498,4511] [2022-11-16 20:31:03,953 WARN L229 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_f28944f0-e65a-4e36-9c6d-1fb015ea6732/sv-benchmarks/c/aws-c-common/aws_byte_cursor_eq_c_str_harness.i[4558,4571] [2022-11-16 20:31:04,002 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,002 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,003 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,003 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,004 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,014 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,015 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,016 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,016 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,067 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-16 20:31:04,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-16 20:31:04,071 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-16 20:31:04,072 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-16 20:31:04,073 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-16 20:31:04,073 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-16 20:31:04,074 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-16 20:31:04,074 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-16 20:31:04,075 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-16 20:31:04,075 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-16 20:31:04,111 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-16 20:31:04,183 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,183 WARN L1554 CHandler]: Possible shadowing of function index [2022-11-16 20:31:04,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:31:04,450 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:31:04,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04 WrapperNode [2022-11-16 20:31:04,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:31:04,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:31:04,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:31:04,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:31:04,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,699 INFO L138 Inliner]: procedures = 691, calls = 2629, calls flagged for inlining = 63, calls inlined = 9, statements flattened = 859 [2022-11-16 20:31:04,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:31:04,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:31:04,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:31:04,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:31:04,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,779 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:31:04,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:31:04,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:31:04,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:31:04,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (1/1) ... [2022-11-16 20:31:04,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:31:04,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:31:04,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:31:04,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:31:04,906 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2022-11-16 20:31:04,907 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2022-11-16 20:31:04,908 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-16 20:31:04,908 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-16 20:31:04,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:31:04,909 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-16 20:31:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-16 20:31:04,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:31:04,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 20:31:04,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 20:31:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:31:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:31:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2022-11-16 20:31:04,912 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2022-11-16 20:31:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 20:31:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:31:04,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:31:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-16 20:31:04,913 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-16 20:31:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-16 20:31:04,913 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-16 20:31:04,913 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 20:31:04,914 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 20:31:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:31:04,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 20:31:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 20:31:04,915 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-16 20:31:04,916 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-16 20:31:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:31:04,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:31:05,272 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:31:05,277 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:31:06,753 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:31:06,945 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:31:06,945 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 20:31:06,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:31:06 BoogieIcfgContainer [2022-11-16 20:31:06,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:31:06,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:31:06,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:31:06,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:31:06,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:31:01" (1/3) ... [2022-11-16 20:31:06,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d8dc07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:31:06, skipping insertion in model container [2022-11-16 20:31:06,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:31:04" (2/3) ... [2022-11-16 20:31:06,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d8dc07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:31:06, skipping insertion in model container [2022-11-16 20:31:06,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:31:06" (3/3) ... [2022-11-16 20:31:06,957 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_eq_c_str_harness.i [2022-11-16 20:31:06,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:31:06,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:31:07,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:31:07,031 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;@246c4dd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:31:07,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:31:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-16 20:31:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 20:31:07,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:07,046 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:31:07,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:07,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:07,052 INFO L85 PathProgramCache]: Analyzing trace with hash -185301531, now seen corresponding path program 1 times [2022-11-16 20:31:07,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:07,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137042926] [2022-11-16 20:31:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:07,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-16 20:31:11,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:11,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137042926] [2022-11-16 20:31:11,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137042926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:31:11,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:31:11,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 20:31:11,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190217329] [2022-11-16 20:31:11,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:31:11,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 20:31:11,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:31:11,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 20:31:11,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:31:11,951 INFO L87 Difference]: Start difference. First operand has 94 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 31 states have call successors, (31), 9 states have call predecessors, (31), 9 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 13 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-16 20:31:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:31:13,837 INFO L93 Difference]: Finished difference Result 174 states and 251 transitions. [2022-11-16 20:31:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 20:31:13,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 79 [2022-11-16 20:31:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:31:13,868 INFO L225 Difference]: With dead ends: 174 [2022-11-16 20:31:13,869 INFO L226 Difference]: Without dead ends: 128 [2022-11-16 20:31:13,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-16 20:31:13,875 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 110 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:31:13,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 930 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 20:31:13,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-16 20:31:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2022-11-16 20:31:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 59 states have internal predecessors, (69), 33 states have call successors, (33), 10 states have call predecessors, (33), 11 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-16 20:31:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 135 transitions. [2022-11-16 20:31:13,933 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 135 transitions. Word has length 79 [2022-11-16 20:31:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:31:13,934 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 135 transitions. [2022-11-16 20:31:13,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-16 20:31:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 135 transitions. [2022-11-16 20:31:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 20:31:13,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:31:13,938 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:31:13,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:31:13,939 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:31:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:31:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1463624368, now seen corresponding path program 1 times [2022-11-16 20:31:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:31:13,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173054252] [2022-11-16 20:31:13,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:13,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:31:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-16 20:31:22,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:31:22,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173054252] [2022-11-16 20:31:22,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173054252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:31:22,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10187799] [2022-11-16 20:31:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:31:22,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:31:22,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:31:22,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:31:22,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f28944f0-e65a-4e36-9c6d-1fb015ea6732/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:31:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:31:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 2634 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-16 20:31:22,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:31:23,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:31:23,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:31:23,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 20:31:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 20:31:25,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:31:26,796 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2022-11-16 20:31:39,968 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.