./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh --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 df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 --- 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-2329fc7 [2022-12-14 07:33:18,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:33:18,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:33:18,599 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:33:18,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:33:18,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:33:18,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:33:18,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:33:18,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:33:18,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:33:18,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:33:18,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:33:18,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:33:18,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:33:18,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:33:18,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:33:18,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:33:18,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:33:18,609 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:33:18,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:33:18,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:33:18,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:33:18,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:33:18,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:33:18,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:33:18,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:33:18,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:33:18,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:33:18,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:33:18,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:33:18,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:33:18,617 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:33:18,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:33:18,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:33:18,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:33:18,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:33:18,620 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:33:18,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:33:18,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:33:18,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:33:18,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:33:18,622 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 07:33:18,636 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:33:18,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:33:18,637 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:33:18,637 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:33:18,637 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:33:18,637 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:33:18,637 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:33:18,637 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:33:18,637 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:33:18,638 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:33:18,638 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:33:18,638 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:33:18,638 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:33:18,638 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:33:18,638 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:33:18,638 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:33:18,638 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:33:18,638 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:33:18,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:33:18,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:33:18,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:33:18,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:33:18,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:33:18,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:33:18,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:33:18,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:33:18,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:33:18,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:33:18,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:33:18,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:33:18,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:33:18,640 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:33:18,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:33:18,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:33:18,640 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:33:18,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:33:18,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:33:18,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:33:18,641 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_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df7033dfc83b180e9cf25def7ed6e49b1b8e99adfb4ac0289552069b1c368159 [2022-12-14 07:33:18,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:33:18,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:33:18,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:33:18,830 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:33:18,831 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:33:18,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2022-12-14 07:33:21,405 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:33:21,694 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:33:21,695 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i [2022-12-14 07:33:21,713 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/data/1ab9b1949/3fd92cfe09184cef92f972f19234c33c/FLAG3481abaa5 [2022-12-14 07:33:21,724 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/data/1ab9b1949/3fd92cfe09184cef92f972f19234c33c [2022-12-14 07:33:21,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:33:21,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:33:21,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:33:21,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:33:21,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:33:21,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:33:21" (1/1) ... [2022-12-14 07:33:21,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75d56ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:21, skipping insertion in model container [2022-12-14 07:33:21,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:33:21" (1/1) ... [2022-12-14 07:33:21,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:33:21,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:33:22,025 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_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4504,4517] [2022-12-14 07:33:22,032 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_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4564,4577] [2022-12-14 07:33:22,797 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:22,798 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:22,799 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:22,800 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:22,801 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:22,816 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:22,816 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:22,818 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:22,819 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:22,910 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:33:22,910 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:33:22,911 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:33:22,917 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 07:33:22,919 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 07:33:22,920 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 07:33:23,190 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 07:33:23,191 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 07:33:23,192 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 07:33:23,192 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 07:33:23,193 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 07:33:23,194 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 07:33:23,194 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 07:33:23,195 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 07:33:23,195 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 07:33:23,196 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 07:33:23,196 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 07:33:23,329 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 07:33:23,356 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 07:33:23,364 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 07:33:23,386 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 07:33:23,392 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,392 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,437 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:33:23,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:33:23,470 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:33:23,480 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_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4504,4517] [2022-12-14 07:33:23,480 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_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/sv-benchmarks/c/aws-c-common/aws_byte_cursor_left_trim_pred_harness.i[4564,4577] [2022-12-14 07:33:23,524 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,524 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,524 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,525 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,525 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,529 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,530 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,530 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,531 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,534 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:33:23,535 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:33:23,535 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 07:33:23,537 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 07:33:23,538 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 07:33:23,538 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 07:33:23,550 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 07:33:23,551 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 07:33:23,551 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 07:33:23,552 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 07:33:23,552 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 07:33:23,553 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 07:33:23,553 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 07:33:23,553 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 07:33:23,554 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 07:33:23,554 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 07:33:23,554 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 07:33:23,567 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 07:33:23,580 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 07:33:23,584 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 07:33:23,595 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 07:33:23,600 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,600 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 07:33:23,617 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:33:23,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:33:23,811 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:33:23,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23 WrapperNode [2022-12-14 07:33:23,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:33:23,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:33:23,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:33:23,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:33:23,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:23,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:23,936 INFO L138 Inliner]: procedures = 690, calls = 2619, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 799 [2022-12-14 07:33:23,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:33:23,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:33:23,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:33:23,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:33:23,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:23,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:23,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:23,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:23,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:23,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:23,991 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:23,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:24,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:33:24,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:33:24,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:33:24,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:33:24,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (1/1) ... [2022-12-14 07:33:24,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:33:24,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:24,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:33:24,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:33:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-12-14 07:33:24,065 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-12-14 07:33:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:33:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-12-14 07:33:24,066 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-12-14 07:33:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:33:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 07:33:24,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 07:33:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2022-12-14 07:33:24,066 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2022-12-14 07:33:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:33:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:33:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 07:33:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:33:24,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:33:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-12-14 07:33:24,067 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-12-14 07:33:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-12-14 07:33:24,067 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-12-14 07:33:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 07:33:24,067 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 07:33:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:33:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 07:33:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 07:33:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2022-12-14 07:33:24,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2022-12-14 07:33:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:33:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:33:24,258 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:33:24,260 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:33:25,042 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:33:25,221 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:33:25,221 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 07:33:25,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:33:25 BoogieIcfgContainer [2022-12-14 07:33:25,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:33:25,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:33:25,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:33:25,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:33:25,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:33:21" (1/3) ... [2022-12-14 07:33:25,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cd5765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:33:25, skipping insertion in model container [2022-12-14 07:33:25,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:33:23" (2/3) ... [2022-12-14 07:33:25,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69cd5765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:33:25, skipping insertion in model container [2022-12-14 07:33:25,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:33:25" (3/3) ... [2022-12-14 07:33:25,232 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_left_trim_pred_harness.i [2022-12-14 07:33:25,251 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:33:25,252 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:33:25,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:33:25,292 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;@62c68778, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:33:25,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:33:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 07:33:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 07:33:25,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:25,302 INFO L195 NwaCegarLoop]: 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] [2022-12-14 07:33:25,302 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:25,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:25,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1472780763, now seen corresponding path program 1 times [2022-12-14 07:33:25,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:25,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994072989] [2022-12-14 07:33:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:25,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 07:33:25,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:25,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994072989] [2022-12-14 07:33:25,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994072989] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:33:25,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:33:25,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:33:25,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285447791] [2022-12-14 07:33:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:33:25,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:33:25,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:25,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:33:25,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:33:25,714 INFO L87 Difference]: Start difference. First operand has 70 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:33:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:25,931 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-12-14 07:33:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:33:25,933 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40 [2022-12-14 07:33:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:25,939 INFO L225 Difference]: With dead ends: 103 [2022-12-14 07:33:25,939 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 07:33:25,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:33:25,943 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:25,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 79 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:33:25,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 07:33:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-14 07:33:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 22 states have call successors, (22), 8 states have call predecessors, (22), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 07:33:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-12-14 07:33:25,973 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 40 [2022-12-14 07:33:25,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:25,974 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-12-14 07:33:25,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:33:25,974 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-12-14 07:33:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 07:33:25,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:25,976 INFO L195 NwaCegarLoop]: 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] [2022-12-14 07:33:25,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:33:25,976 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1669484966, now seen corresponding path program 1 times [2022-12-14 07:33:25,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:25,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778116845] [2022-12-14 07:33:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:25,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:33:27,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:27,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778116845] [2022-12-14 07:33:27,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778116845] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:33:27,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:33:27,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 07:33:27,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852845868] [2022-12-14 07:33:27,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:33:27,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:33:27,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:27,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:33:27,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:33:27,817 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 07:33:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:29,391 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2022-12-14 07:33:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:33:29,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-12-14 07:33:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:29,394 INFO L225 Difference]: With dead ends: 89 [2022-12-14 07:33:29,394 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 07:33:29,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-12-14 07:33:29,395 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 51 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:29,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 453 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 07:33:29,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 07:33:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2022-12-14 07:33:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 40 states have (on average 1.175) internal successors, (47), 42 states have internal predecessors, (47), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 07:33:29,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-12-14 07:33:29,406 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 42 [2022-12-14 07:33:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:29,406 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-12-14 07:33:29,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-14 07:33:29,407 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-12-14 07:33:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 07:33:29,407 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:29,407 INFO L195 NwaCegarLoop]: 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, 1, 1, 1] [2022-12-14 07:33:29,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:33:29,408 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:29,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1599741866, now seen corresponding path program 1 times [2022-12-14 07:33:29,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:29,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333608243] [2022-12-14 07:33:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:29,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 07:33:32,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:32,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333608243] [2022-12-14 07:33:32,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333608243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:33:32,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217552292] [2022-12-14 07:33:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:32,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:32,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:32,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:32,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:33:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:32,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 2502 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 07:33:32,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:32,928 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 07:33:32,931 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 07:33:32,934 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 07:33:35,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:33:35,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 93 [2022-12-14 07:33:35,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:33:35,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 81 [2022-12-14 07:33:35,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:33:35,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 69 [2022-12-14 07:33:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 07:33:36,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:33:36,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217552292] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:33:36,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:33:36,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [14] total 29 [2022-12-14 07:33:36,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63929149] [2022-12-14 07:33:36,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:33:36,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 07:33:36,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 07:33:36,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2022-12-14 07:33:36,081 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 17 states, 10 states have (on average 2.5) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 07:33:39,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:33:41,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:33:43,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:33:45,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:33:48,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:33:50,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:33:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:50,790 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2022-12-14 07:33:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 07:33:50,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 10 states have (on average 2.5) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 46 [2022-12-14 07:33:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:50,792 INFO L225 Difference]: With dead ends: 114 [2022-12-14 07:33:50,792 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 07:33:50,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 07:33:50,793 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 92 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 59 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:50,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 394 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 708 Invalid, 6 Unknown, 0 Unchecked, 14.3s Time] [2022-12-14 07:33:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 07:33:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2022-12-14 07:33:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 33 states have call successors, (33), 14 states have call predecessors, (33), 13 states have return successors, (30), 30 states have call predecessors, (30), 29 states have call successors, (30) [2022-12-14 07:33:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-12-14 07:33:50,809 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 46 [2022-12-14 07:33:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:50,809 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-12-14 07:33:50,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 10 states have (on average 2.5) internal successors, (25), 13 states have internal predecessors, (25), 7 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 07:33:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-12-14 07:33:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 07:33:50,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:50,810 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:50,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:33:51,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:51,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash 283024734, now seen corresponding path program 1 times [2022-12-14 07:33:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:51,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916962651] [2022-12-14 07:33:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:51,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 07:33:51,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:51,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916962651] [2022-12-14 07:33:51,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916962651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:33:51,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:33:51,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:33:51,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034962437] [2022-12-14 07:33:51,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:33:51,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:33:51,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:33:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:33:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:33:51,158 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:33:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:33:51,379 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-12-14 07:33:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:33:51,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2022-12-14 07:33:51,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:33:51,380 INFO L225 Difference]: With dead ends: 138 [2022-12-14 07:33:51,380 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 07:33:51,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:33:51,381 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 0 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:33:51,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 137 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:33:51,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 07:33:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-12-14 07:33:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 59 states have internal predecessors, (65), 33 states have call successors, (33), 14 states have call predecessors, (33), 13 states have return successors, (30), 30 states have call predecessors, (30), 29 states have call successors, (30) [2022-12-14 07:33:51,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2022-12-14 07:33:51,395 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 45 [2022-12-14 07:33:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:33:51,395 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2022-12-14 07:33:51,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 07:33:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2022-12-14 07:33:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 07:33:51,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:33:51,397 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:33:51,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:33:51,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:33:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:33:51,397 INFO L85 PathProgramCache]: Analyzing trace with hash -575123282, now seen corresponding path program 1 times [2022-12-14 07:33:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:33:51,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746439552] [2022-12-14 07:33:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:51,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:33:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 07:33:53,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:33:53,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746439552] [2022-12-14 07:33:53,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746439552] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:33:53,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315377761] [2022-12-14 07:33:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:33:53,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:33:53,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:33:53,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:33:53,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1bd4d61-a87d-47a2-8ffb-e5105da7214c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:33:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:33:54,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 2537 conjuncts, 90 conjunts are in the unsatisfiable core [2022-12-14 07:33:54,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:33:54,235 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 07:33:54,237 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 07:33:54,239 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2022-12-14 07:33:54,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:54,938 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-12-14 07:33:54,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 95 [2022-12-14 07:33:54,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:33:54,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:33:54,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 78 [2022-12-14 07:33:55,398 INFO L321 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2022-12-14 07:33:55,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 30 [2022-12-14 07:33:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:33:55,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:33:56,329 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 13430 disjunctions. This might take some time... [2022-12-14 07:34:07,663 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.