./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/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_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/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_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/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_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/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 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:52:03,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:52:03,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:52:03,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:52:03,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:52:03,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:52:03,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:52:03,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:52:03,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:52:03,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:52:03,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:52:03,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:52:03,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:52:03,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:52:03,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:52:03,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:52:03,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:52:03,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:52:03,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:52:03,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:52:03,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:52:03,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:52:03,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:52:03,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:52:03,653 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:52:03,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:52:03,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:52:03,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:52:03,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:52:03,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:52:03,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:52:03,660 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:52:03,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:52:03,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:52:03,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:52:03,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:52:03,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:52:03,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:52:03,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:52:03,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:52:03,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:52:03,669 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:52:03,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:52:03,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:52:03,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:52:03,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:52:03,721 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:52:03,721 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:52:03,721 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:52:03,722 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:52:03,722 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:52:03,722 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:52:03,723 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:52:03,724 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:52:03,724 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:52:03,724 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:52:03,725 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:52:03,725 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:52:03,725 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:52:03,726 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:52:03,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:52:03,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:52:03,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:52:03,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:52:03,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:52:03,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:52:03,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:52:03,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:52:03,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:52:03,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:52:03,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:52:03,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:52:03,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:52:03,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:52:03,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:52:03,733 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:52:03,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:52:03,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:52:03,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:52:03,734 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:52:03,735 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_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db28b965fea5f2f8d3364c7a869d0042b63b50d32f7a417c3baadcb401d0709 [2021-11-20 23:52:04,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:52:04,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:52:04,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:52:04,044 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:52:04,045 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:52:04,046 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-11-20 23:52:04,124 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/data/5d4a28d24/c9c3cc8c5f94456f9e02a2fa6f2d8ea3/FLAGe2dfb5974 [2021-11-20 23:52:05,031 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:52:05,032 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i [2021-11-20 23:52:05,106 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/data/5d4a28d24/c9c3cc8c5f94456f9e02a2fa6f2d8ea3/FLAGe2dfb5974 [2021-11-20 23:52:05,529 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/data/5d4a28d24/c9c3cc8c5f94456f9e02a2fa6f2d8ea3 [2021-11-20 23:52:05,532 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:52:05,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:52:05,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:52:05,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:52:05,543 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:52:05,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:52:05" (1/1) ... [2021-11-20 23:52:05,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68077d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:05, skipping insertion in model container [2021-11-20 23:52:05,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:52:05" (1/1) ... [2021-11-20 23:52:05,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:52:05,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:52:06,009 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_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2021-11-20 23:52:06,016 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_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2021-11-20 23:52:07,068 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,069 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,069 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,070 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,072 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,088 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,089 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,091 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,092 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,517 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:52:07,519 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:52:07,520 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:52:07,521 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:52:07,523 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:52:07,523 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:52:07,524 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:52:07,532 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:52:07,534 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:52:07,534 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:52:07,714 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:52:07,868 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,868 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:07,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:52:08,045 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:52:08,075 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_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4498,4511] [2021-11-20 23:52:08,076 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_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/sv-benchmarks/c/aws-c-common/aws_byte_buf_secure_zero_harness.i[4558,4571] [2021-11-20 23:52:08,120 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,120 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,121 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,121 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,122 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,129 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,130 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,131 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,131 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,164 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:52:08,165 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:52:08,166 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:52:08,166 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:52:08,167 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:52:08,168 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:52:08,168 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:52:08,169 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:52:08,169 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:52:08,170 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:52:08,191 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:52:08,246 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,309 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:52:08,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:52:08,563 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:52:08,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08 WrapperNode [2021-11-20 23:52:08,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:52:08,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:52:08,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:52:08,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:52:08,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,815 INFO L137 Inliner]: procedures = 691, calls = 2614, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 796 [2021-11-20 23:52:08,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:52:08,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:52:08,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:52:08,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:52:08,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,908 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:52:08,909 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:52:08,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:52:08,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:52:08,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (1/1) ... [2021-11-20 23:52:08,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:52:08,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:08,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:52:08,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:52:09,038 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-20 23:52:09,039 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-20 23:52:09,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:52:09,040 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 23:52:09,041 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 23:52:09,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:52:09,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:52:09,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:52:09,043 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-11-20 23:52:09,043 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-11-20 23:52:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:52:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:52:09,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:52:09,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:52:09,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:52:09,046 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 23:52:09,046 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 23:52:09,046 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:52:09,046 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:52:09,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:52:09,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:52:09,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:52:09,048 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-20 23:52:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-20 23:52:09,049 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 23:52:09,049 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 23:52:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:52:09,050 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-20 23:52:09,051 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-20 23:52:09,051 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-20 23:52:09,051 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-20 23:52:09,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:52:09,365 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:52:09,380 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:52:10,669 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:52:10,943 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:52:10,944 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 23:52:10,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:52:10 BoogieIcfgContainer [2021-11-20 23:52:10,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:52:10,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:52:10,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:52:10,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:52:10,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:52:05" (1/3) ... [2021-11-20 23:52:10,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4b2fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:52:10, skipping insertion in model container [2021-11-20 23:52:10,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:52:08" (2/3) ... [2021-11-20 23:52:10,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4b2fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:52:10, skipping insertion in model container [2021-11-20 23:52:10,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:52:10" (3/3) ... [2021-11-20 23:52:10,963 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_secure_zero_harness.i [2021-11-20 23:52:10,968 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:52:10,968 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:52:11,024 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:52:11,039 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 23:52:11,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:52:11,062 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) [2021-11-20 23:52:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 23:52:11,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:11,069 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] [2021-11-20 23:52:11,070 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash 410522729, now seen corresponding path program 1 times [2021-11-20 23:52:11,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:11,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861910978] [2021-11-20 23:52:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:11,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:52:12,768 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:12,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861910978] [2021-11-20 23:52:12,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861910978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:52:12,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:52:12,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 23:52:12,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571100280] [2021-11-20 23:52:12,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:52:12,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 23:52:12,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:52:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 23:52:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:52:12,820 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) [2021-11-20 23:52:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:52:13,162 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2021-11-20 23:52:13,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 23:52:13,164 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 [2021-11-20 23:52:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:52:13,172 INFO L225 Difference]: With dead ends: 101 [2021-11-20 23:52:13,173 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 23:52:13,176 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 [2021-11-20 23:52:13,179 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 [2021-11-20 23:52:13,180 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] [2021-11-20 23:52:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 23:52:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-20 23:52:13,239 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) [2021-11-20 23:52:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2021-11-20 23:52:13,243 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 43 [2021-11-20 23:52:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:52:13,245 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2021-11-20 23:52:13,245 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) [2021-11-20 23:52:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2021-11-20 23:52:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 23:52:13,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:52:13,248 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] [2021-11-20 23:52:13,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:52:13,249 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:52:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:52:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1275170069, now seen corresponding path program 1 times [2021-11-20 23:52:13,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:52:13,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075678420] [2021-11-20 23:52:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:13,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:52:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:52:15,269 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:52:15,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075678420] [2021-11-20 23:52:15,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075678420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:52:15,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648712184] [2021-11-20 23:52:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:52:15,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:52:15,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:52:15,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:52:15,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1b7b2d-7dbd-42fc-a06a-b08bfabff2b6/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:52:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:52:15,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 23:52:15,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:52:16,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:52:21,969 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 [2021-11-20 23:52:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:52:22,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:52:22,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:52:22,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2021-11-20 23:52:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:52:22,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:52:25,693 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2021-11-21 00:00:34,829 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.