./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/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_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/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_52f3de8d-c73d-4864-85c5-2382092f3525/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 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:35:30,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:35:30,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:35:30,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:35:30,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:35:30,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:35:30,641 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:35:30,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:35:30,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:35:30,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:35:30,648 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:35:30,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:35:30,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:35:30,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:35:30,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:35:30,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:35:30,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:35:30,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:35:30,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:35:30,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:35:30,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:35:30,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:35:30,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:35:30,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:35:30,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:35:30,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:35:30,676 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:35:30,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:35:30,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:35:30,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:35:30,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:35:30,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:35:30,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:35:30,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:35:30,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:35:30,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:35:30,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:35:30,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:35:30,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:35:30,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:35:30,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:35:30,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:35:30,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:35:30,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:35:30,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:35:30,740 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:35:30,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:35:30,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:35:30,752 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:35:30,752 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:35:30,752 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:35:30,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:35:30,753 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:35:30,754 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:35:30,754 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:35:30,754 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:35:30,754 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:35:30,754 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:35:30,755 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:35:30,755 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:35:30,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:35:30,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:35:30,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:35:30,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:35:30,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:35:30,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:35:30,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:35:30,757 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:35:30,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:35:30,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:35:30,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:35:30,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:30,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:35:30,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:35:30,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:35:30,765 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:35:30,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:35:30,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:35:30,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:35:30,766 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:35:30,766 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_52f3de8d-c73d-4864-85c5-2382092f3525/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2fd96106837ff3ee9325c248fea6969b94a5a1f2cee078fd159398f70369aafc [2021-11-20 23:35:31,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:35:31,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:35:31,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:35:31,078 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:35:31,079 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:35:31,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2021-11-20 23:35:31,139 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/data/53a8e4635/a17ebca9cba34eca9872f9d99bc8ea58/FLAGc4504b162 [2021-11-20 23:35:31,885 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:35:31,886 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i [2021-11-20 23:35:31,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/data/53a8e4635/a17ebca9cba34eca9872f9d99bc8ea58/FLAGc4504b162 [2021-11-20 23:35:31,956 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/data/53a8e4635/a17ebca9cba34eca9872f9d99bc8ea58 [2021-11-20 23:35:31,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:35:31,962 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:35:31,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:31,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:35:31,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:35:31,969 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:31" (1/1) ... [2021-11-20 23:35:31,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@149f80d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:31, skipping insertion in model container [2021-11-20 23:35:31,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:35:31" (1/1) ... [2021-11-20 23:35:31,979 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:35:32,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:35:32,512 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_52f3de8d-c73d-4864-85c5-2382092f3525/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4499,4512] [2021-11-20 23:35:32,522 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_52f3de8d-c73d-4864-85c5-2382092f3525/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4559,4572] [2021-11-20 23:35:33,499 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:33,501 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:33,501 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:33,503 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:33,504 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:33,522 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:33,523 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:33,525 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:33,532 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,104 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:35:34,105 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:35:34,107 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:35:34,108 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:35:34,114 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:35:34,119 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:35:34,121 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:35:34,122 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:35:34,124 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:35:34,126 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:35:34,339 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:35:34,459 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,460 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:34,606 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:35:34,620 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_52f3de8d-c73d-4864-85c5-2382092f3525/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4499,4512] [2021-11-20 23:35:34,620 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_52f3de8d-c73d-4864-85c5-2382092f3525/sv-benchmarks/c/aws-c-common/aws_byte_cursor_trim_pred_harness.i[4559,4572] [2021-11-20 23:35:34,655 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,656 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,656 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,657 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,657 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,664 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,664 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,665 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,666 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,700 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:35:34,701 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:35:34,702 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:35:34,703 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:35:34,704 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:35:34,704 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:35:34,705 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:35:34,705 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:35:34,706 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:35:34,706 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:35:34,728 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:35:34,834 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,834 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:35:34,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:35:35,171 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:35:35,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35 WrapperNode [2021-11-20 23:35:35,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:35:35,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:35,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:35:35,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:35:35,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,411 INFO L137 Inliner]: procedures = 690, calls = 2620, calls flagged for inlining = 62, calls inlined = 10, statements flattened = 894 [2021-11-20 23:35:35,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:35:35,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:35:35,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:35:35,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:35:35,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:35:35,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:35:35,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:35:35,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:35:35,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (1/1) ... [2021-11-20 23:35:35,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:35:35,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:35,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:35:35,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:35:35,642 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-20 23:35:35,643 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-20 23:35:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:35:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 23:35:35,644 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 23:35:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:35:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:35:35,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:35:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2021-11-20 23:35:35,646 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2021-11-20 23:35:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:35:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:35:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:35:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:35:35,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:35:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 23:35:35,648 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 23:35:35,648 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-20 23:35:35,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-20 23:35:35,648 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:35:35,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:35:35,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:35:35,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:35:35,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:35:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2021-11-20 23:35:35,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2021-11-20 23:35:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:35:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:35:35,984 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:35:35,986 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:35:37,707 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:35:37,845 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:35:37,846 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:35:37,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:37 BoogieIcfgContainer [2021-11-20 23:35:37,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:35:37,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:35:37,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:35:37,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:35:37,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:35:31" (1/3) ... [2021-11-20 23:35:37,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab6c410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:37, skipping insertion in model container [2021-11-20 23:35:37,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:35:35" (2/3) ... [2021-11-20 23:35:37,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab6c410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:35:37, skipping insertion in model container [2021-11-20 23:35:37,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:35:37" (3/3) ... [2021-11-20 23:35:37,857 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_trim_pred_harness.i [2021-11-20 23:35:37,863 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:35:37,863 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:35:37,912 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:35:37,919 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:35:37,919 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:35:37,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-20 23:35:37,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 23:35:37,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:37,946 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 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] [2021-11-20 23:35:37,947 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash 728730477, now seen corresponding path program 1 times [2021-11-20 23:35:37,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:37,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031433180] [2021-11-20 23:35:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:37,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 23:35:38,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:38,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031433180] [2021-11-20 23:35:38,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031433180] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:38,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:38,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:35:38,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293874153] [2021-11-20 23:35:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:38,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 23:35:38,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:38,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 23:35:38,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:35:38,688 INFO L87 Difference]: Start difference. First operand has 97 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 23:35:38,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:38,835 INFO L93 Difference]: Finished difference Result 156 states and 227 transitions. [2021-11-20 23:35:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 23:35:38,838 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 51 [2021-11-20 23:35:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:38,847 INFO L225 Difference]: With dead ends: 156 [2021-11-20 23:35:38,847 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 23:35:38,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 23:35:38,860 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:38,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:35:38,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 23:35:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-20 23:35:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 37 states have call successors, (37), 8 states have call predecessors, (37), 7 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-20 23:35:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2021-11-20 23:35:38,907 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 51 [2021-11-20 23:35:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:38,909 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2021-11-20 23:35:38,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 23:35:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2021-11-20 23:35:38,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 23:35:38,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:38,913 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 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] [2021-11-20 23:35:38,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:35:38,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:38,914 INFO L85 PathProgramCache]: Analyzing trace with hash -674183560, now seen corresponding path program 1 times [2021-11-20 23:35:38,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:38,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883275918] [2021-11-20 23:35:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:38,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-20 23:35:40,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:40,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883275918] [2021-11-20 23:35:40,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883275918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:35:40,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:35:40,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-20 23:35:40,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419376019] [2021-11-20 23:35:40,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:35:40,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 23:35:40,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:35:40,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 23:35:40,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-20 23:35:40,146 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 23:35:41,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:35:41,132 INFO L93 Difference]: Finished difference Result 123 states and 173 transitions. [2021-11-20 23:35:41,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 23:35:41,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 53 [2021-11-20 23:35:41,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:35:41,137 INFO L225 Difference]: With dead ends: 123 [2021-11-20 23:35:41,137 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 23:35:41,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-11-20 23:35:41,139 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 94 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:35:41,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 777 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 23:35:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 23:35:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 100. [2021-11-20 23:35:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 54 states have internal predecessors, (61), 39 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-20 23:35:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 137 transitions. [2021-11-20 23:35:41,161 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 137 transitions. Word has length 53 [2021-11-20 23:35:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:35:41,162 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 137 transitions. [2021-11-20 23:35:41,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-20 23:35:41,162 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 137 transitions. [2021-11-20 23:35:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 23:35:41,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:35:41,165 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 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] [2021-11-20 23:35:41,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:35:41,165 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:35:41,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:35:41,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2146172008, now seen corresponding path program 1 times [2021-11-20 23:35:41,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:35:41,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867198530] [2021-11-20 23:35:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:41,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:35:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-20 23:35:42,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:35:42,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867198530] [2021-11-20 23:35:42,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867198530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:35:42,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882493820] [2021-11-20 23:35:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:35:42,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:35:42,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:35:42,357 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:35:42,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52f3de8d-c73d-4864-85c5-2382092f3525/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:35:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:35:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 2535 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-20 23:35:42,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:35:43,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:35:43,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-20 23:35:43,236 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 19 treesize of output 1 [2021-11-20 23:35:44,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:35:44,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:35:44,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-11-20 23:35:44,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:35:44,835 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 23:35:44,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2021-11-20 23:35:46,593 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-20 23:35:46,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2021-11-20 23:35:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:35:46,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:35:48,130 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 13430 disjunctions. This might take some time... [2021-11-20 23:36:09,850 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.