./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P --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 df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:54:32,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:54:32,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:54:33,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:54:33,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:54:33,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:54:33,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:54:33,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:54:33,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:54:33,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:54:33,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:54:33,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:54:33,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:54:33,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:54:33,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:54:33,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:54:33,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:54:33,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:54:33,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:54:33,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:54:33,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:54:33,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:54:33,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:54:33,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:54:33,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:54:33,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:54:33,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:54:33,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:54:33,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:54:33,091 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:54:33,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:54:33,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:54:33,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:54:33,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:54:33,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:54:33,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:54:33,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:54:33,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:54:33,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:54:33,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:54:33,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:54:33,103 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:54:33,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:54:33,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:54:33,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:54:33,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:54:33,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:54:33,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:54:33,166 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:54:33,167 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:54:33,167 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:54:33,167 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:54:33,167 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:54:33,168 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:54:33,168 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:54:33,168 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:54:33,168 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:54:33,168 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:54:33,169 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:54:33,169 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:54:33,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:54:33,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:54:33,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:54:33,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:54:33,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:54:33,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:54:33,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:54:33,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:54:33,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:54:33,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:54:33,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:54:33,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:54:33,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:54:33,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:54:33,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:54:33,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:54:33,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:54:33,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:54:33,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:54:33,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:54:33,174 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_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 [2021-11-20 23:54:33,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:54:33,500 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:54:33,503 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:54:33,504 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:54:33,505 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:54:33,507 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2021-11-20 23:54:33,584 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/data/b8ee16b89/358caf386bf54a778d27d6f277a8373d/FLAG71ff2814a [2021-11-20 23:54:34,636 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:54:34,638 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2021-11-20 23:54:34,688 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/data/b8ee16b89/358caf386bf54a778d27d6f277a8373d/FLAG71ff2814a [2021-11-20 23:54:35,067 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/data/b8ee16b89/358caf386bf54a778d27d6f277a8373d [2021-11-20 23:54:35,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:54:35,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:54:35,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:54:35,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:54:35,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:54:35,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:35" (1/1) ... [2021-11-20 23:54:35,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4606a5c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:35, skipping insertion in model container [2021-11-20 23:54:35,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:35" (1/1) ... [2021-11-20 23:54:35,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:54:35,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:54:35,577 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_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4504,4517] [2021-11-20 23:54:35,589 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_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4564,4577] [2021-11-20 23:54:36,733 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:36,734 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:36,735 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:36,736 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:36,737 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:36,754 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:36,755 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:36,758 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:36,759 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:37,221 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:54:37,222 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:54:37,223 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:54:37,225 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:54:37,227 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:54:37,228 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:54:37,229 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:54:37,230 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:54:37,231 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:54:37,232 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:54:37,467 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:54:37,634 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:37,634 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:37,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:54:37,894 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:54:37,948 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_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4504,4517] [2021-11-20 23:54:37,949 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_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4564,4577] [2021-11-20 23:54:38,011 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,012 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,012 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,013 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,014 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,021 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,021 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,022 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,023 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,061 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:54:38,062 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:54:38,062 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:54:38,063 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:54:38,064 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:54:38,065 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:54:38,065 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:54:38,066 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:54:38,066 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:54:38,067 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:54:38,089 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:54:38,187 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,187 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:54:38,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:54:38,541 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:54:38,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38 WrapperNode [2021-11-20 23:54:38,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:54:38,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:54:38,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:54:38,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:54:38,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,833 INFO L137 Inliner]: procedures = 690, calls = 2620, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 800 [2021-11-20 23:54:38,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:54:38,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:54:38,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:54:38,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:54:38,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:54:38,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:54:38,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:54:38,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:54:38,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (1/1) ... [2021-11-20 23:54:38,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:54:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:54:39,005 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:54:39,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:54:39,064 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-20 23:54:39,064 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-20 23:54:39,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:54:39,065 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 23:54:39,065 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 23:54:39,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:54:39,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:54:39,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:54:39,066 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2021-11-20 23:54:39,066 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2021-11-20 23:54:39,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:54:39,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:54:39,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:54:39,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:54:39,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:54:39,067 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 23:54:39,068 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 23:54:39,068 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-20 23:54:39,068 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-20 23:54:39,068 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:54:39,068 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:54:39,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:54:39,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:54:39,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:54:39,069 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-11-20 23:54:39,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-11-20 23:54:39,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:54:39,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:54:39,392 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:54:39,406 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:54:41,081 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:54:41,273 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:54:41,274 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:54:41,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:54:41 BoogieIcfgContainer [2021-11-20 23:54:41,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:54:41,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:54:41,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:54:41,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:54:41,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:54:35" (1/3) ... [2021-11-20 23:54:41,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279de729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:54:41, skipping insertion in model container [2021-11-20 23:54:41,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:38" (2/3) ... [2021-11-20 23:54:41,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279de729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:54:41, skipping insertion in model container [2021-11-20 23:54:41,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:54:41" (3/3) ... [2021-11-20 23:54:41,288 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_left_trim_pred_harness.i [2021-11-20 23:54:41,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:54:41,298 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:54:41,372 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:54:41,390 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 [2021-11-20 23:54:41,394 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:54:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 23:54:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 23:54:41,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:41,428 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:41,429 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:41,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1706243424, now seen corresponding path program 1 times [2021-11-20 23:54:41,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:41,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757112359] [2021-11-20 23:54:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:41,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:54:42,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:42,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757112359] [2021-11-20 23:54:42,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757112359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:42,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:42,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:54:42,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876570377] [2021-11-20 23:54:42,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:42,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:54:42,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:42,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:54:42,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:54:42,270 INFO L87 Difference]: Start difference. First operand has 70 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:54:42,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:42,651 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2021-11-20 23:54:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:54:42,659 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40 [2021-11-20 23:54:42,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:42,669 INFO L225 Difference]: With dead ends: 103 [2021-11-20 23:54:42,669 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 23:54:42,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:54:42,677 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:42,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:54:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 23:54:42,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-20 23:54:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-20 23:54:42,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2021-11-20 23:54:42,730 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 40 [2021-11-20 23:54:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:42,732 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2021-11-20 23:54:42,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:54:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2021-11-20 23:54:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 23:54:42,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:42,735 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:42,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:54:42,736 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:42,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:42,737 INFO L85 PathProgramCache]: Analyzing trace with hash 348988715, now seen corresponding path program 1 times [2021-11-20 23:54:42,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:42,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774476667] [2021-11-20 23:54:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:42,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 23:54:43,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774476667] [2021-11-20 23:54:43,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774476667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:43,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:43,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 23:54:43,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422298337] [2021-11-20 23:54:43,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:43,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:54:43,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:43,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:54:43,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:54:43,643 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 23:54:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:45,720 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2021-11-20 23:54:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 23:54:45,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2021-11-20 23:54:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:45,726 INFO L225 Difference]: With dead ends: 89 [2021-11-20 23:54:45,726 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 23:54:45,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:54:45,728 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 50 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:45,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 509 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-20 23:54:45,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 23:54:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2021-11-20 23:54:45,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 23:54:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2021-11-20 23:54:45,753 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 42 [2021-11-20 23:54:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:45,754 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2021-11-20 23:54:45,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 23:54:45,754 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2021-11-20 23:54:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 23:54:45,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:45,757 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:45,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:54:45,757 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1396918630, now seen corresponding path program 1 times [2021-11-20 23:54:45,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:45,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065136352] [2021-11-20 23:54:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:45,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 23:54:47,287 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065136352] [2021-11-20 23:54:47,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065136352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:54:47,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411376261] [2021-11-20 23:54:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:47,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:47,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:54:47,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:54:47,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43e28d1d-4e0f-4465-963e-bfc2b9a67de1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:54:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:48,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 2478 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-20 23:54:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:54:48,377 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 27 treesize of output 23 [2021-11-20 23:54:48,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:54:50,522 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 37 [2021-11-20 23:54:50,527 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 34 treesize of output 22 [2021-11-20 23:54:51,749 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 23:54:51,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 28 [2021-11-20 23:54:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:54:51,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:54:53,922 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 13430 disjunctions. This might take some time... [2021-11-20 23:55:16,537 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.