./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.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_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/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_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/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_79515c74-b457-4e92-8a27-f494756a67c5/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 6e8329de8885610e11451d8b1311f161005fbaac7c4b7180f37a9501d850f1ce --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:14:23,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:14:23,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:14:23,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:14:23,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:14:23,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:14:23,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:14:23,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:14:23,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:14:23,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:14:23,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:14:23,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:14:23,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:14:23,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:14:23,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:14:23,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:14:23,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:14:23,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:14:23,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:14:23,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:14:23,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:14:23,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:14:23,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:14:23,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:14:23,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:14:23,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:14:23,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:14:23,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:14:23,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:14:23,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:14:23,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:14:23,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:14:23,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:14:23,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:14:23,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:14:23,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:14:23,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:14:23,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:14:23,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:14:23,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:14:23,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:14:23,371 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:14:23,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:14:23,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:14:23,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:14:23,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:14:23,416 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:14:23,422 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:14:23,423 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:14:23,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:14:23,423 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:14:23,423 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:14:23,423 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:14:23,423 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:14:23,423 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:14:23,424 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:14:23,424 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:14:23,424 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:14:23,424 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:14:23,424 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:14:23,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:14:23,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:14:23,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:14:23,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:14:23,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:14:23,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:14:23,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:14:23,427 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:14:23,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:14:23,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:14:23,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:14:23,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:14:23,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:14:23,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:14:23,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:14:23,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:14:23,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:14:23,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:14:23,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:14:23,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:14:23,430 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_79515c74-b457-4e92-8a27-f494756a67c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e8329de8885610e11451d8b1311f161005fbaac7c4b7180f37a9501d850f1ce [2021-11-21 00:14:23,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:14:23,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:14:23,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:14:23,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:14:23,684 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:14:23,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i [2021-11-21 00:14:23,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/data/2631ca4bf/3e08bffafe1c45cf8f3ea66e10455471/FLAG68f587e55 [2021-11-21 00:14:24,741 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:14:24,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i [2021-11-21 00:14:24,811 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/data/2631ca4bf/3e08bffafe1c45cf8f3ea66e10455471/FLAG68f587e55 [2021-11-21 00:14:25,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/data/2631ca4bf/3e08bffafe1c45cf8f3ea66e10455471 [2021-11-21 00:14:25,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:14:25,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:14:25,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:14:25,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:14:25,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:14:25,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35dac7f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:25, skipping insertion in model container [2021-11-21 00:14:25,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:14:25" (1/1) ... [2021-11-21 00:14:25,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:14:25,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:14:25,701 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_79515c74-b457-4e92-8a27-f494756a67c5/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i[4492,4505] [2021-11-21 00:14:25,707 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_79515c74-b457-4e92-8a27-f494756a67c5/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i[4552,4565] [2021-11-21 00:14:26,663 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:26,664 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:26,664 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:26,666 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:26,667 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:26,682 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:26,683 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:26,686 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:26,687 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,144 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:14:27,145 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:14:27,147 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:14:27,148 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:14:27,149 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:14:27,150 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:14:27,151 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:14:27,152 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:14:27,153 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:14:27,153 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:14:27,367 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:14:27,500 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,500 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,572 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:14:27,641 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:14:27,675 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_79515c74-b457-4e92-8a27-f494756a67c5/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i[4492,4505] [2021-11-21 00:14:27,676 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_79515c74-b457-4e92-8a27-f494756a67c5/sv-benchmarks/c/aws-c-common/aws_array_eq_c_str_harness-1.i[4552,4565] [2021-11-21 00:14:27,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,714 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,715 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,716 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,723 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,723 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,725 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,725 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,760 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:14:27,761 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:14:27,762 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:14:27,763 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:14:27,764 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:14:27,764 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:14:27,765 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:14:27,765 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:14:27,766 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:14:27,767 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:14:27,789 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:14:27,849 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,850 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:14:27,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:14:28,202 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:14:28,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28 WrapperNode [2021-11-21 00:14:28,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:14:28,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:14:28,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:14:28,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:14:28,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,345 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,440 INFO L137 Inliner]: procedures = 691, calls = 2615, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 806 [2021-11-21 00:14:28,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:14:28,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:14:28,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:14:28,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:14:28,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:14:28,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:14:28,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:14:28,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:14:28,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (1/1) ... [2021-11-21 00:14:28,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:14:28,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:28,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:14:28,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:14:28,653 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2021-11-21 00:14:28,654 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2021-11-21 00:14:28,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:14:28,655 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 00:14:28,656 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 00:14:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:14:28,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:14:28,657 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:14:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:14:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:14:28,657 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-21 00:14:28,658 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-21 00:14:28,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:14:28,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:14:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 00:14:28,659 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 00:14:28,659 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-21 00:14:28,659 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-21 00:14:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-21 00:14:28,660 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-21 00:14:28,660 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:14:28,660 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:14:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:14:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:14:28,661 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 00:14:28,662 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 00:14:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:14:28,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:14:28,930 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:14:28,932 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:14:30,276 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:14:30,397 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:14:30,398 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:14:30,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:14:30 BoogieIcfgContainer [2021-11-21 00:14:30,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:14:30,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:14:30,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:14:30,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:14:30,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:14:25" (1/3) ... [2021-11-21 00:14:30,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1179772f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:14:30, skipping insertion in model container [2021-11-21 00:14:30,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:14:28" (2/3) ... [2021-11-21 00:14:30,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1179772f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:14:30, skipping insertion in model container [2021-11-21 00:14:30,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:14:30" (3/3) ... [2021-11-21 00:14:30,411 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_array_eq_c_str_harness-1.i [2021-11-21 00:14:30,416 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:14:30,417 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:14:30,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:14:30,496 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 00:14:30,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:14:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 48 states have internal predecessors, (59), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-21 00:14:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-21 00:14:30,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:30,531 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:30,533 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:30,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash -182093070, now seen corresponding path program 1 times [2021-11-21 00:14:30,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:30,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493529304] [2021-11-21 00:14:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:30,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:31,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:14:31,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:31,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493529304] [2021-11-21 00:14:31,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493529304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:31,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988188370] [2021-11-21 00:14:31,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:31,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:31,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:31,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:31,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:14:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:32,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 2438 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:14:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:14:32,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:14:32,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988188370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:14:32,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:14:32,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2021-11-21 00:14:32,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259853794] [2021-11-21 00:14:32,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:14:32,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:14:32,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:14:32,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:14:32,447 INFO L87 Difference]: Start difference. First operand has 82 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 48 states have internal predecessors, (59), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:14:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:32,673 INFO L93 Difference]: Finished difference Result 132 states and 186 transitions. [2021-11-21 00:14:32,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:14:32,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 52 [2021-11-21 00:14:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:32,691 INFO L225 Difference]: With dead ends: 132 [2021-11-21 00:14:32,691 INFO L226 Difference]: Without dead ends: 80 [2021-11-21 00:14:32,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:14:32,698 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 0 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:32,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 342 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:14:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-21 00:14:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-21 00:14:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 44 states have (on average 1.25) internal successors, (55), 46 states have internal predecessors, (55), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-21 00:14:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 106 transitions. [2021-11-21 00:14:32,745 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 106 transitions. Word has length 52 [2021-11-21 00:14:32,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:32,747 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 106 transitions. [2021-11-21 00:14:32,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-21 00:14:32,747 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 106 transitions. [2021-11-21 00:14:32,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-21 00:14:32,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:32,751 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:32,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:32,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-21 00:14:32,977 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:32,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1731146581, now seen corresponding path program 1 times [2021-11-21 00:14:32,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:32,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693503190] [2021-11-21 00:14:32,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:32,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-21 00:14:33,539 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:33,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693503190] [2021-11-21 00:14:33,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693503190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:14:33,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515986389] [2021-11-21 00:14:33,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:33,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:33,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:33,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:33,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79515c74-b457-4e92-8a27-f494756a67c5/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:14:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:14:34,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 2510 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-21 00:14:34,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-21 00:14:35,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-21 00:14:37,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515986389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:14:37,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [766403952] [2021-11-21 00:14:37,919 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2021-11-21 00:14:37,919 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:14:37,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:14:37,933 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:14:37,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs