./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/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_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/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_c4f471d0-2111-4d28-ab02-1987a47dfe1a/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 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:09:47,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:09:47,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:09:47,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:09:47,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:09:47,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:09:47,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:09:47,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:09:47,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:09:47,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:09:47,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:09:47,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:09:47,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:09:47,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:09:47,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:09:47,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:09:47,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:09:47,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:09:47,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:09:47,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:09:47,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:09:47,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:09:47,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:09:47,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:09:47,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:09:47,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:09:47,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:09:47,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:09:47,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:09:47,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:09:47,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:09:47,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:09:47,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:09:47,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:09:47,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:09:47,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:09:47,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:09:47,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:09:47,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:09:47,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:09:47,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:09:47,189 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:09:47,229 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:09:47,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:09:47,230 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:09:47,230 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:09:47,231 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:09:47,238 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:09:47,238 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:09:47,239 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:09:47,239 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:09:47,239 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:09:47,240 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:09:47,241 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:09:47,241 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:09:47,241 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:09:47,241 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:09:47,241 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:09:47,242 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:09:47,242 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:09:47,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:09:47,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:09:47,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:09:47,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:09:47,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:09:47,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:09:47,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:09:47,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:09:47,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:09:47,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:09:47,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:09:47,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:09:47,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:09:47,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:09:47,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:09:47,248 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:09:47,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:09:47,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:09:47,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:09:47,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:09:47,249 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_c4f471d0-2111-4d28-ab02-1987a47dfe1a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce [2021-11-21 00:09:47,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:09:47,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:09:47,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:09:47,549 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:09:47,550 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:09:47,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2021-11-21 00:09:47,632 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/data/ce0501400/eed800c00c7143b5a9fc577efe78810d/FLAG862aa316b [2021-11-21 00:09:48,536 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:09:48,537 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2021-11-21 00:09:48,580 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/data/ce0501400/eed800c00c7143b5a9fc577efe78810d/FLAG862aa316b [2021-11-21 00:09:49,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/data/ce0501400/eed800c00c7143b5a9fc577efe78810d [2021-11-21 00:09:49,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:09:49,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:09:49,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:09:49,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:09:49,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:09:49,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:09:49" (1/1) ... [2021-11-21 00:09:49,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c943ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:49, skipping insertion in model container [2021-11-21 00:09:49,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:09:49" (1/1) ... [2021-11-21 00:09:49,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:09:49,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:09:49,552 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_c4f471d0-2111-4d28-ab02-1987a47dfe1a/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2021-11-21 00:09:49,560 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_c4f471d0-2111-4d28-ab02-1987a47dfe1a/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2021-11-21 00:09:50,722 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:50,724 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:50,725 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:50,726 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:50,731 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:50,756 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:50,757 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:50,767 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:50,768 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:51,332 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:09:51,333 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:09:51,335 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:09:51,336 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:09:51,337 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:09:51,338 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:09:51,339 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:09:51,340 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:09:51,340 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:09:51,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:09:51,585 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:09:51,747 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:51,748 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:51,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:09:51,958 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:09:51,973 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_c4f471d0-2111-4d28-ab02-1987a47dfe1a/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2021-11-21 00:09:51,974 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_c4f471d0-2111-4d28-ab02-1987a47dfe1a/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2021-11-21 00:09:52,010 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,011 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,011 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,012 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,012 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,018 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,019 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,020 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,020 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,054 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:09:52,055 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:09:52,056 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:09:52,057 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:09:52,058 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:09:52,058 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:09:52,059 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:09:52,059 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:09:52,060 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:09:52,060 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:09:52,080 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:09:52,141 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,141 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:09:52,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:09:52,605 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:09:52,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52 WrapperNode [2021-11-21 00:09:52,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:09:52,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:09:52,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:09:52,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:09:52,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:52,787 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:52,911 INFO L137 Inliner]: procedures = 693, calls = 2792, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 879 [2021-11-21 00:09:52,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:09:52,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:09:52,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:09:52,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:09:52,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:52,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:52,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:52,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:53,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:53,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:53,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:53,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:09:53,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:09:53,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:09:53,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:09:53,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (1/1) ... [2021-11-21 00:09:53,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:09:53,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:09:53,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:09:53,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:09:53,172 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2021-11-21 00:09:53,173 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2021-11-21 00:09:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-21 00:09:53,174 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-21 00:09:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2021-11-21 00:09:53,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2021-11-21 00:09:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-21 00:09:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:09:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 00:09:53,177 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 00:09:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:09:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:09:53,178 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:09:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:09:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:09:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:09:53,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:09:53,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:09:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 00:09:53,179 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 00:09:53,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 00:09:53,180 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:09:53,181 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:09:53,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:09:53,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:09:53,181 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-11-21 00:09:53,182 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-11-21 00:09:53,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:09:53,183 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 00:09:53,183 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 00:09:53,183 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 00:09:53,183 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 00:09:53,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:09:53,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:09:53,547 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:09:53,549 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:09:55,286 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:09:55,523 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:09:55,523 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:09:55,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:09:55 BoogieIcfgContainer [2021-11-21 00:09:55,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:09:55,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:09:55,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:09:55,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:09:55,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:09:49" (1/3) ... [2021-11-21 00:09:55,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35eddd1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:09:55, skipping insertion in model container [2021-11-21 00:09:55,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:09:52" (2/3) ... [2021-11-21 00:09:55,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35eddd1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:09:55, skipping insertion in model container [2021-11-21 00:09:55,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:09:55" (3/3) ... [2021-11-21 00:09:55,537 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_buf_harness.i [2021-11-21 00:09:55,546 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:09:55,546 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:09:55,617 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:09:55,632 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 [2021-11-21 00:09:55,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:09:55,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-21 00:09:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-21 00:09:55,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:09:55,674 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:55,675 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:09:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:09:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1565822056, now seen corresponding path program 1 times [2021-11-21 00:09:55,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:09:55,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966367908] [2021-11-21 00:09:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:55,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:09:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:09:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 00:09:56,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:09:56,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966367908] [2021-11-21 00:09:56,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966367908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:09:56,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:09:56,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:09:56,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632155353] [2021-11-21 00:09:56,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:09:56,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:09:56,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:09:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:09:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:09:56,586 INFO L87 Difference]: Start difference. First operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-21 00:09:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:09:56,854 INFO L93 Difference]: Finished difference Result 161 states and 221 transitions. [2021-11-21 00:09:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:09:56,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 51 [2021-11-21 00:09:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:09:56,872 INFO L225 Difference]: With dead ends: 161 [2021-11-21 00:09:56,873 INFO L226 Difference]: Without dead ends: 125 [2021-11-21 00:09:56,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:09:56,887 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 12 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:09:56,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 348 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:09:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-21 00:09:56,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-11-21 00:09:56,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 70 states have internal predecessors, (84), 43 states have call successors, (43), 10 states have call predecessors, (43), 10 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-21 00:09:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2021-11-21 00:09:56,971 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 51 [2021-11-21 00:09:56,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:09:56,973 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2021-11-21 00:09:56,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-21 00:09:56,973 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2021-11-21 00:09:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-21 00:09:56,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:09:56,978 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:09:56,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:09:56,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:09:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:09:56,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1246662955, now seen corresponding path program 1 times [2021-11-21 00:09:56,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:09:56,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137433405] [2021-11-21 00:09:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:09:56,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:10:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 00:10:01,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:10:01,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137433405] [2021-11-21 00:10:01,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137433405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:10:01,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885692293] [2021-11-21 00:10:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:01,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:01,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:01,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:01,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4f471d0-2111-4d28-ab02-1987a47dfe1a/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:10:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:10:02,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-21 00:10:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:02,561 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 18 treesize of output 14 [2021-11-21 00:10:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 00:10:10,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:13,355 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2021-11-21 00:23:54,672 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.