./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_array_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_array_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 704abadf4a8c9a8af61418181b8ae91b3e3da2fe96f0fde7751e748b781a863c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:37:37,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:37:37,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:37:37,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:37:37,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:37:37,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:37:37,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:37:37,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:37:37,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:37:37,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:37:37,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:37:37,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:37:37,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:37:37,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:37:38,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:37:38,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:37:38,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:37:38,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:37:38,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:37:38,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:37:38,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:37:38,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:37:38,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:37:38,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:37:38,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:37:38,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:37:38,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:37:38,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:37:38,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:37:38,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:37:38,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:37:38,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:37:38,051 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:37:38,052 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:37:38,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:37:38,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:37:38,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:37:38,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:37:38,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:37:38,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:37:38,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:37:38,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:37:38,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:37:38,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:37:38,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:37:38,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:37:38,120 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:37:38,120 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:37:38,120 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:37:38,121 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:37:38,121 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:37:38,121 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:37:38,122 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:37:38,122 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:37:38,123 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:37:38,123 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:37:38,123 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:37:38,124 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:37:38,124 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:37:38,124 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:37:38,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:37:38,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:37:38,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:37:38,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:37:38,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:37:38,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:37:38,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:37:38,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:37:38,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:37:38,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:37:38,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:37:38,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:37:38,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:37:38,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:37:38,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:37:38,131 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:37:38,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:37:38,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:37:38,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:37:38,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:37:38,132 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 704abadf4a8c9a8af61418181b8ae91b3e3da2fe96f0fde7751e748b781a863c [2021-11-25 19:37:38,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:37:38,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:37:38,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:37:38,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:37:38,467 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:37:38,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_array_harness.i [2021-11-25 19:37:38,547 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/data/34a1c2d7a/95ba8ab03dd8435c8cb3261b17ba7db9/FLAG60b9d8834 [2021-11-25 19:37:39,328 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:37:39,329 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_array_harness.i [2021-11-25 19:37:39,388 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/data/34a1c2d7a/95ba8ab03dd8435c8cb3261b17ba7db9/FLAG60b9d8834 [2021-11-25 19:37:39,533 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/data/34a1c2d7a/95ba8ab03dd8435c8cb3261b17ba7db9 [2021-11-25 19:37:39,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:37:39,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:37:39,541 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:37:39,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:37:39,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:37:39,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:37:39" (1/1) ... [2021-11-25 19:37:39,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c9c1f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:39, skipping insertion in model container [2021-11-25 19:37:39,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:37:39" (1/1) ... [2021-11-25 19:37:39,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:37:39,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:37:39,969 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_array_harness.i[4500,4513] [2021-11-25 19:37:39,977 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_array_harness.i[4560,4573] [2021-11-25 19:37:40,947 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:40,949 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:40,950 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:40,951 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:40,954 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:40,985 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:40,996 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:40,998 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:40,998 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,365 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 19:37:41,367 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 19:37:41,368 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 19:37:41,369 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 19:37:41,371 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 19:37:41,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 19:37:41,372 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 19:37:41,373 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 19:37:41,374 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 19:37:41,374 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 19:37:41,548 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 19:37:41,641 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,642 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:37:41,810 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:37:41,838 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_array_harness.i[4500,4513] [2021-11-25 19:37:41,839 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/sv-benchmarks/c/aws-c-common/aws_byte_cursor_from_array_harness.i[4560,4573] [2021-11-25 19:37:41,889 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,889 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,889 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,890 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,898 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,907 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,913 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,916 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,918 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:41,964 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 19:37:41,964 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 19:37:41,965 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 19:37:41,968 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 19:37:41,969 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 19:37:41,970 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 19:37:41,970 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 19:37:41,971 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 19:37:41,971 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 19:37:41,971 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 19:37:42,000 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 19:37:42,117 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:42,117 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:37:42,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:37:42,365 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:37:42,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42 WrapperNode [2021-11-25 19:37:42,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:37:42,367 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:37:42,367 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:37:42,367 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:37:42,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,604 INFO L137 Inliner]: procedures = 690, calls = 2609, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 777 [2021-11-25 19:37:42,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:37:42,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:37:42,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:37:42,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:37:42,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:37:42,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:37:42,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:37:42,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:37:42,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (1/1) ... [2021-11-25 19:37:42,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:37:42,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:42,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:37:42,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:37:42,809 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-25 19:37:42,809 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-25 19:37:42,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:37:42,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:37:42,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 19:37:42,811 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 19:37:42,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:37:42,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:37:42,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:37:42,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:37:42,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:37:42,813 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 19:37:42,814 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 19:37:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:37:42,814 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:37:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:37:42,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:37:42,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:37:42,815 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 19:37:42,815 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 19:37:42,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:37:42,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:37:43,080 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:37:43,097 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:37:44,407 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:37:44,575 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:37:44,576 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 19:37:44,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:37:44 BoogieIcfgContainer [2021-11-25 19:37:44,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:37:44,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:37:44,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:37:44,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:37:44,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:37:39" (1/3) ... [2021-11-25 19:37:44,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a25b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:37:44, skipping insertion in model container [2021-11-25 19:37:44,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:37:42" (2/3) ... [2021-11-25 19:37:44,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a25b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:37:44, skipping insertion in model container [2021-11-25 19:37:44,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:37:44" (3/3) ... [2021-11-25 19:37:44,589 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_from_array_harness.i [2021-11-25 19:37:44,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:37:44,595 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:37:44,650 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:37:44,667 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:37:44,668 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:37:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-25 19:37:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:37:44,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:44,697 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:37:44,697 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:44,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1726220798, now seen corresponding path program 1 times [2021-11-25 19:37:44,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:44,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233028516] [2021-11-25 19:37:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:44,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:37:46,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:46,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233028516] [2021-11-25 19:37:46,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233028516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:37:46,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181657538] [2021-11-25 19:37:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:46,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:46,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:46,289 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:46,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:37:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:46,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 2356 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 19:37:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:47,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:37:47,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:37:47,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 19:37:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:37:48,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:37:48,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181657538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:37:48,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:37:48,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [13] total 22 [2021-11-25 19:37:48,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610678165] [2021-11-25 19:37:48,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:37:48,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:37:48,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:37:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:37:48,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:37:48,700 INFO L87 Difference]: Start difference. First operand has 41 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:37:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:37:48,975 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2021-11-25 19:37:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:37:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2021-11-25 19:37:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:37:48,986 INFO L225 Difference]: With dead ends: 80 [2021-11-25 19:37:48,986 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 19:37:48,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:37:48,993 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:37:48,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 250 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2021-11-25 19:37:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 19:37:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-25 19:37:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-25 19:37:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-11-25 19:37:49,034 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 20 [2021-11-25 19:37:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:37:49,034 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-11-25 19:37:49,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-25 19:37:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-11-25 19:37:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-25 19:37:49,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:37:49,037 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 19:37:49,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:37:49,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 19:37:49,264 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:37:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:37:49,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1561058022, now seen corresponding path program 1 times [2021-11-25 19:37:49,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:37:49,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155738063] [2021-11-25 19:37:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:49,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:37:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:50,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:37:50,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:37:50,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155738063] [2021-11-25 19:37:50,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155738063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:37:50,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334439867] [2021-11-25 19:37:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:37:50,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:37:50,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:37:50,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:37:50,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b21f2f8e-9fa7-48d3-a364-50621c806804/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:37:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:37:50,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 2396 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-25 19:37:50,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:37:50,979 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-25 19:37:50,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-11-25 19:37:56,143 INFO L354 Elim1Store]: treesize reduction 36, result has 55.6 percent of original size [2021-11-25 19:37:56,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 116 [2021-11-25 19:37:56,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2021-11-25 19:37:56,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-11-25 19:37:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:37:56,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:37:57,258 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2021-11-25 19:38:16,626 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.