./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:08:32,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:08:32,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:08:32,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:08:32,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:08:32,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:08:32,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:08:32,703 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:08:32,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:08:32,707 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:08:32,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:08:32,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:08:32,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:08:32,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:08:32,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:08:32,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:08:32,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:08:32,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:08:32,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:08:32,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:08:32,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:08:32,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:08:32,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:08:32,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:08:32,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:08:32,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:08:32,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:08:32,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:08:32,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:08:32,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:08:32,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:08:32,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:08:32,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:08:32,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:08:32,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:08:32,746 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:08:32,747 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:08:32,747 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:08:32,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:08:32,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:08:32,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:08:32,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:08:32,776 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:08:32,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:08:32,777 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:08:32,778 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:08:32,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:08:32,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:08:32,779 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:08:32,779 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:08:32,780 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:08:32,780 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:08:32,780 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:08:32,780 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:08:32,781 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:08:32,781 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:08:32,781 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:08:32,782 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:08:32,782 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:08:32,782 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:08:32,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:08:32,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:08:32,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:08:32,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:08:32,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:08:32,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:08:32,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:08:32,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:08:32,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:08:32,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:08:32,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:08:32,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:08:32,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:08:32,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:08:32,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:08:32,787 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:08:32,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:08:32,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:08:32,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:08:32,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:08:32,789 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_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 [2021-11-25 20:08:33,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:08:33,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:08:33,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:08:33,127 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:08:33,128 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:08:33,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-11-25 20:08:33,199 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/data/e482d25f1/062dbabf8c884f6b8b07cd63b6b461d4/FLAG36543e93c [2021-11-25 20:08:33,999 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:08:34,000 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-11-25 20:08:34,046 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/data/e482d25f1/062dbabf8c884f6b8b07cd63b6b461d4/FLAG36543e93c [2021-11-25 20:08:34,069 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/data/e482d25f1/062dbabf8c884f6b8b07cd63b6b461d4 [2021-11-25 20:08:34,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:08:34,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:08:34,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:08:34,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:08:34,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:08:34,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:08:34" (1/1) ... [2021-11-25 20:08:34,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e44f48a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:34, skipping insertion in model container [2021-11-25 20:08:34,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:08:34" (1/1) ... [2021-11-25 20:08:34,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:08:34,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:08:34,482 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_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2021-11-25 20:08:34,489 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_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2021-11-25 20:08:35,573 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:35,575 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:35,576 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:35,578 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:35,580 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:35,610 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:35,611 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:35,614 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:35,615 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 20:08:36,107 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 20:08:36,108 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 20:08:36,109 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 20:08:36,110 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 20:08:36,111 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 20:08:36,113 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 20:08:36,113 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 20:08:36,114 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 20:08:36,114 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 20:08:36,260 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 20:08:36,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,353 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:08:36,550 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:08:36,578 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_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2021-11-25 20:08:36,579 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_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2021-11-25 20:08:36,626 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,627 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,628 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,628 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,633 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,649 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,649 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,653 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,653 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,711 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 20:08:36,712 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 20:08:36,713 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 20:08:36,713 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 20:08:36,714 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 20:08:36,715 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 20:08:36,715 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 20:08:36,716 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 20:08:36,716 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 20:08:36,721 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 20:08:36,749 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 20:08:36,832 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,832 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 20:08:36,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:08:37,135 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:08:37,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37 WrapperNode [2021-11-25 20:08:37,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:08:37,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:08:37,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:08:37,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:08:37,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,353 INFO L137 Inliner]: procedures = 691, calls = 2614, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 796 [2021-11-25 20:08:37,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:08:37,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:08:37,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:08:37,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:08:37,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:08:37,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:08:37,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:08:37,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:08:37,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (1/1) ... [2021-11-25 20:08:37,496 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:08:37,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:37,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:08:37,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:08:37,584 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-25 20:08:37,584 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-25 20:08:37,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:08:37,585 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 20:08:37,586 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 20:08:37,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:08:37,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:08:37,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:08:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-11-25 20:08:37,588 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-11-25 20:08:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:08:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:08:37,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:08:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:08:37,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:08:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 20:08:37,589 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 20:08:37,589 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:08:37,589 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:08:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:08:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:08:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:08:37,590 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-25 20:08:37,591 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-25 20:08:37,591 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 20:08:37,591 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 20:08:37,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:08:37,592 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-25 20:08:37,592 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-25 20:08:37,592 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-25 20:08:37,592 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-25 20:08:37,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:08:37,945 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:08:37,947 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:08:39,474 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:08:39,733 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:08:39,734 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:08:39,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:08:39 BoogieIcfgContainer [2021-11-25 20:08:39,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:08:39,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:08:39,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:08:39,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:08:39,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:08:34" (1/3) ... [2021-11-25 20:08:39,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0daa7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:08:39, skipping insertion in model container [2021-11-25 20:08:39,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:08:37" (2/3) ... [2021-11-25 20:08:39,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0daa7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:08:39, skipping insertion in model container [2021-11-25 20:08:39,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:08:39" (3/3) ... [2021-11-25 20:08:39,749 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_secure_zero_harness.i [2021-11-25 20:08:39,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:08:39,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:08:39,821 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:08:39,837 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:08:39,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:08:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 20:08:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 20:08:39,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:39,872 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:39,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:39,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:39,879 INFO L85 PathProgramCache]: Analyzing trace with hash 410522729, now seen corresponding path program 1 times [2021-11-25 20:08:39,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:39,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517360058] [2021-11-25 20:08:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:39,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:08:41,529 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:41,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517360058] [2021-11-25 20:08:41,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517360058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:08:41,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:08:41,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 20:08:41,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722508014] [2021-11-25 20:08:41,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:08:41,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:08:41,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:08:41,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:08:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:08:41,567 INFO L87 Difference]: Start difference. First operand has 70 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 20:08:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:08:41,911 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2021-11-25 20:08:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:08:41,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2021-11-25 20:08:41,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:08:41,922 INFO L225 Difference]: With dead ends: 101 [2021-11-25 20:08:41,923 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 20:08:41,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:08:41,929 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 26 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:08:41,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 339 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:08:41,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 20:08:41,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-25 20:08:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 37 states have internal predecessors, (41), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-25 20:08:41,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-11-25 20:08:41,976 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 43 [2021-11-25 20:08:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:08:41,978 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-11-25 20:08:41,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-25 20:08:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-11-25 20:08:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-25 20:08:41,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:08:41,982 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:08:41,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:08:41,982 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:08:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:08:41,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1275170069, now seen corresponding path program 1 times [2021-11-25 20:08:41,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:08:41,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438447044] [2021-11-25 20:08:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:41,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:08:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:08:44,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:08:44,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438447044] [2021-11-25 20:08:44,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438447044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:08:44,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320532541] [2021-11-25 20:08:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:08:44,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:44,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:44,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:44,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96b2d1a3-b5b0-4bec-9c31-4194cf18cdbd/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:08:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:08:44,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-25 20:08:44,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:44,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:08:48,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 68 [2021-11-25 20:08:48,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:08:48,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 20:08:49,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-25 20:08:49,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-11-25 20:08:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:08:49,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:08:53,004 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2021-11-25 20:16:28,353 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.