./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_from_empty_array_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_from_empty_array_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur --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 2e74061603d1466b037b305bab04ccfaa41041189a61fef40533e07a2fdf1d25 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 22:14:29,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:14:29,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:14:29,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:14:29,650 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:14:29,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:14:29,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:14:29,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:14:29,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:14:29,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:14:29,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:14:29,659 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:14:29,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:14:29,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:14:29,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:14:29,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:14:29,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:14:29,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:14:29,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:14:29,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:14:29,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:14:29,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:14:29,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:14:29,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:14:29,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:14:29,677 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:14:29,677 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:14:29,678 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:14:29,678 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:14:29,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:14:29,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:14:29,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:14:29,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:14:29,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:14:29,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:14:29,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:14:29,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:14:29,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:14:29,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:14:29,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:14:29,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:14:29,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-25 22:14:29,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:14:29,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:14:29,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:14:29,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:14:29,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:14:29,743 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:14:29,743 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:14:29,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:14:29,744 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:14:29,744 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:14:29,745 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:14:29,745 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:14:29,745 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:14:29,745 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:14:29,746 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:14:29,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:14:29,746 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:14:29,746 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:14:29,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:14:29,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:14:29,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:14:29,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:14:29,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:14:29,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:14:29,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:14:29,749 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:14:29,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:14:29,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:14:29,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:14:29,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:14:29,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:14:29,751 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:14:29,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:14:29,751 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:14:29,751 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:14:29,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:14:29,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:14:29,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:14:29,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e74061603d1466b037b305bab04ccfaa41041189a61fef40533e07a2fdf1d25 [2022-11-25 22:14:30,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:14:30,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:14:30,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:14:30,085 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:14:30,085 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:14:30,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_from_empty_array_harness.i [2022-11-25 22:14:32,995 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:14:33,528 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:14:33,531 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_empty_array_harness.i [2022-11-25 22:14:33,577 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/data/b0491292e/416f20aed011484bb98dce62974a6e96/FLAG8c0c28b32 [2022-11-25 22:14:33,597 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/data/b0491292e/416f20aed011484bb98dce62974a6e96 [2022-11-25 22:14:33,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:14:33,602 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:14:33,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:14:33,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:14:33,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:14:33,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:14:33" (1/1) ... [2022-11-25 22:14:33,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474f6a60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:33, skipping insertion in model container [2022-11-25 22:14:33,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:14:33" (1/1) ... [2022-11-25 22:14:33,623 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:14:33,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:14:33,962 WARN L237 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_f3eb97fd-548b-4985-9970-9a8345433d7c/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_empty_array_harness.i[4503,4516] [2022-11-25 22:14:33,972 WARN L237 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_f3eb97fd-548b-4985-9970-9a8345433d7c/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_empty_array_harness.i[4563,4576] [2022-11-25 22:14:35,069 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,071 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,071 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,072 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,074 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,091 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,094 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,097 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,097 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,216 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:14:35,217 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:14:35,218 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:14:35,226 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 22:14:35,228 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 22:14:35,229 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 22:14:35,630 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 22:14:35,634 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 22:14:35,638 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 22:14:35,641 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 22:14:35,644 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 22:14:35,647 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 22:14:35,648 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 22:14:35,648 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 22:14:35,649 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 22:14:35,650 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 22:14:35,650 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 22:14:35,823 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 22:14:35,860 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 22:14:35,881 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:14:35,932 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:14:35,950 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:35,950 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,030 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 22:14:36,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:14:36,110 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:14:36,131 WARN L237 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_f3eb97fd-548b-4985-9970-9a8345433d7c/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_empty_array_harness.i[4503,4516] [2022-11-25 22:14:36,142 WARN L237 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_f3eb97fd-548b-4985-9970-9a8345433d7c/sv-benchmarks/c/aws-c-common/aws_byte_buf_from_empty_array_harness.i[4563,4576] [2022-11-25 22:14:36,184 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,185 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,185 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,187 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,188 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,194 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,195 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,196 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,199 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,212 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:14:36,212 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:14:36,212 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-25 22:14:36,215 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-25 22:14:36,221 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-25 22:14:36,221 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-25 22:14:36,253 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-25 22:14:36,254 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-25 22:14:36,255 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-25 22:14:36,256 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-25 22:14:36,256 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-25 22:14:36,257 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-25 22:14:36,258 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-25 22:14:36,258 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-25 22:14:36,259 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-25 22:14:36,259 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-25 22:14:36,260 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-25 22:14:36,294 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-25 22:14:36,333 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-25 22:14:36,342 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:14:36,361 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 22:14:36,375 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,375 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-25 22:14:36,405 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-25 22:14:36,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:14:36,672 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:14:36,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36 WrapperNode [2022-11-25 22:14:36,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:14:36,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:14:36,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:14:36,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:14:36,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,873 INFO L138 Inliner]: procedures = 690, calls = 2613, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 789 [2022-11-25 22:14:36,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:14:36,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:14:36,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:14:36,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:14:36,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,963 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:14:36,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:14:36,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:14:36,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:14:36,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (1/1) ... [2022-11-25 22:14:36,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:14:37,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:37,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:14:37,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:14:37,067 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-25 22:14:37,067 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-25 22:14:37,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:14:37,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 22:14:37,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 22:14:37,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 22:14:37,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 22:14:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:14:37,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 22:14:37,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:14:37,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:14:37,070 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-25 22:14:37,070 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-25 22:14:37,070 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 22:14:37,070 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 22:14:37,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:14:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 22:14:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-25 22:14:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-25 22:14:37,071 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-25 22:14:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 22:14:37,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:14:37,421 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:14:37,424 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:14:38,668 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:14:38,948 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:14:38,948 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 22:14:38,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:14:38 BoogieIcfgContainer [2022-11-25 22:14:38,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:14:38,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:14:38,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:14:38,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:14:38,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:14:33" (1/3) ... [2022-11-25 22:14:38,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d094f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:14:38, skipping insertion in model container [2022-11-25 22:14:38,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:14:36" (2/3) ... [2022-11-25 22:14:38,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d094f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:14:38, skipping insertion in model container [2022-11-25 22:14:38,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:14:38" (3/3) ... [2022-11-25 22:14:38,961 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_from_empty_array_harness.i [2022-11-25 22:14:38,980 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:14:38,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 22:14:39,045 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:14:39,055 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@447afd55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:14:39,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 22:14:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 22:14:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 22:14:39,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:39,072 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:39,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:39,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash -656214311, now seen corresponding path program 1 times [2022-11-25 22:14:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:39,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677182391] [2022-11-25 22:14:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:39,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:14:47,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677182391] [2022-11-25 22:14:47,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677182391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:14:47,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:14:47,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-25 22:14:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952413995] [2022-11-25 22:14:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:14:47,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 22:14:47,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:14:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 22:14:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:14:47,976 INFO L87 Difference]: Start difference. First operand has 45 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 11 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:14:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:14:48,422 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2022-11-25 22:14:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 22:14:48,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2022-11-25 22:14:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:14:48,432 INFO L225 Difference]: With dead ends: 83 [2022-11-25 22:14:48,433 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 22:14:48,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-25 22:14:48,439 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 21 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:14:48,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 321 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:14:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 22:14:48,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-25 22:14:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 22:14:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-25 22:14:48,483 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 20 [2022-11-25 22:14:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:14:48,484 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-25 22:14:48,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 22:14:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-25 22:14:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 22:14:48,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:14:48,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:14:48,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:14:48,487 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:14:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:14:48,488 INFO L85 PathProgramCache]: Analyzing trace with hash 181677805, now seen corresponding path program 1 times [2022-11-25 22:14:48,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:14:48,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654346411] [2022-11-25 22:14:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:48,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:14:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 22:14:58,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:14:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654346411] [2022-11-25 22:14:58,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654346411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:14:58,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050981472] [2022-11-25 22:14:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:14:58,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:14:58,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:14:58,582 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:14:58,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3eb97fd-548b-4985-9970-9a8345433d7c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:14:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:14:59,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 2432 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-25 22:14:59,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:14:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:59,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:59,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-25 22:14:59,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:59,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:14:59,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-25 22:15:09,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:15:09,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 477 treesize of output 581 [2022-11-25 22:15:09,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:15:09,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 413 treesize of output 525 [2022-11-25 22:15:10,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:15:10,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 1 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 84 case distinctions, treesize of input 357 treesize of output 557