./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_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_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/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_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/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_18aff5ad-77fa-43cc-af29-c359e99d0015/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 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 --- 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 08:39:55,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:39:55,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:39:55,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:39:55,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:39:55,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:39:55,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:39:55,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:39:55,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:39:55,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:39:55,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:39:55,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:39:55,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:39:55,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:39:55,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:39:55,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:39:55,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:39:55,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:39:55,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:39:55,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:39:55,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:39:55,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:39:55,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:39:55,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:39:55,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:39:55,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:39:55,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:39:55,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:39:55,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:39:55,241 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:39:55,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:39:55,242 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:39:55,243 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:39:55,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:39:55,245 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:39:55,245 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:39:55,246 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:39:55,246 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:39:55,246 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:39:55,247 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:39:55,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:39:55,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 08:39:55,276 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:39:55,276 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:39:55,277 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:39:55,277 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:39:55,277 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:39:55,278 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:39:55,278 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:39:55,278 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:39:55,278 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:39:55,278 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:39:55,278 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:39:55,279 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:39:55,279 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:39:55,279 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:39:55,279 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:39:55,279 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:39:55,279 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:39:55,280 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:39:55,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:39:55,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:39:55,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:39:55,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:39:55,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:39:55,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:39:55,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:39:55,281 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:39:55,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:39:55,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:39:55,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:39:55,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:39:55,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:39:55,282 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:39:55,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:39:55,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:39:55,283 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:39:55,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:39:55,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:39:55,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:39:55,283 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_18aff5ad-77fa-43cc-af29-c359e99d0015/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 [2022-12-14 08:39:55,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:39:55,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:39:55,494 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:39:55,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:39:55,495 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:39:55,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2022-12-14 08:39:58,039 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:39:58,302 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:39:58,303 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2022-12-14 08:39:58,320 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/data/e5c2c51af/01185ab08117405baef9c453786b8ed9/FLAGa65d242a6 [2022-12-14 08:39:58,331 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/data/e5c2c51af/01185ab08117405baef9c453786b8ed9 [2022-12-14 08:39:58,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:39:58,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:39:58,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:39:58,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:39:58,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:39:58,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:39:58" (1/1) ... [2022-12-14 08:39:58,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b55ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:58, skipping insertion in model container [2022-12-14 08:39:58,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:39:58" (1/1) ... [2022-12-14 08:39:58,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:39:58,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:39:58,580 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_18aff5ad-77fa-43cc-af29-c359e99d0015/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2022-12-14 08:39:58,586 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_18aff5ad-77fa-43cc-af29-c359e99d0015/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2022-12-14 08:39:59,127 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,128 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,128 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,129 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,130 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,139 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,139 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,140 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,141 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,196 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:39:59,196 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:39:59,197 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:39:59,200 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 08:39:59,201 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 08:39:59,201 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 08:39:59,411 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 08:39:59,412 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 08:39:59,413 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 08:39:59,413 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 08:39:59,414 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 08:39:59,415 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 08:39:59,415 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 08:39:59,416 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 08:39:59,416 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 08:39:59,416 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 08:39:59,417 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 08:39:59,534 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 08:39:59,560 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 08:39:59,568 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 08:39:59,597 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 08:39:59,602 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,602 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,640 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 08:39:59,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:39:59,676 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:39:59,685 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_18aff5ad-77fa-43cc-af29-c359e99d0015/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2022-12-14 08:39:59,685 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_18aff5ad-77fa-43cc-af29-c359e99d0015/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2022-12-14 08:39:59,708 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,708 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,709 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,709 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,709 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,713 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,714 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,714 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,715 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,719 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:39:59,719 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:39:59,720 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:39:59,722 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 08:39:59,723 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 08:39:59,723 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 08:39:59,736 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 08:39:59,736 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 08:39:59,737 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 08:39:59,737 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 08:39:59,738 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 08:39:59,738 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 08:39:59,738 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 08:39:59,739 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 08:39:59,739 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 08:39:59,739 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 08:39:59,740 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 08:39:59,754 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 08:39:59,768 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-12-14 08:39:59,772 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 08:39:59,783 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-14 08:39:59,787 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,787 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:39:59,805 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 08:39:59,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:39:59,955 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:39:59,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59 WrapperNode [2022-12-14 08:39:59,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:39:59,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:39:59,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:39:59,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:39:59,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,019 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,064 INFO L138 Inliner]: procedures = 690, calls = 2613, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 810 [2022-12-14 08:40:00,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:40:00,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:40:00,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:40:00,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:40:00,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,107 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:40:00,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:40:00,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:40:00,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:40:00,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (1/1) ... [2022-12-14 08:40:00,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:40:00,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:40:00,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:40:00,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:40:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-12-14 08:40:00,180 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-12-14 08:40:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:40:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-12-14 08:40:00,180 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-12-14 08:40:00,180 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:40:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 08:40:00,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 08:40:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2022-12-14 08:40:00,181 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2022-12-14 08:40:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:40:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:40:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 08:40:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:40:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:40:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-12-14 08:40:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-12-14 08:40:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-12-14 08:40:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-12-14 08:40:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 08:40:00,182 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 08:40:00,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:40:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 08:40:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 08:40:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2022-12-14 08:40:00,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2022-12-14 08:40:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:40:00,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:40:00,406 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:40:00,408 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:40:01,141 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:40:01,288 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:40:01,288 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:40:01,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:40:01 BoogieIcfgContainer [2022-12-14 08:40:01,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:40:01,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:40:01,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:40:01,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:40:01,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:39:58" (1/3) ... [2022-12-14 08:40:01,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38254884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:40:01, skipping insertion in model container [2022-12-14 08:40:01,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:39:59" (2/3) ... [2022-12-14 08:40:01,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38254884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:40:01, skipping insertion in model container [2022-12-14 08:40:01,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:40:01" (3/3) ... [2022-12-14 08:40:01,296 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_satisfies_pred_harness.i [2022-12-14 08:40:01,310 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:40:01,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:40:01,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:40:01,350 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;@3939a4de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:40:01,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:40:01,353 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 08:40:01,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 08:40:01,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:40:01,359 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 08:40:01,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:40:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:40:01,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1914174624, now seen corresponding path program 1 times [2022-12-14 08:40:01,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:40:01,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895036794] [2022-12-14 08:40:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:40:01,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:40:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:40:01,771 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 08:40:01,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:40:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895036794] [2022-12-14 08:40:01,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895036794] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:40:01,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:40:01,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:40:01,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416662455] [2022-12-14 08:40:01,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:40:01,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:40:01,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:40:01,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:40:01,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:40:01,809 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 08:40:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:40:01,991 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-12-14 08:40:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:40:01,994 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 08:40:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:40:02,002 INFO L225 Difference]: With dead ends: 103 [2022-12-14 08:40:02,002 INFO L226 Difference]: Without dead ends: 64 [2022-12-14 08:40:02,005 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 08:40:02,008 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:40:02,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:40:02,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-14 08:40:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-12-14 08:40:02,046 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 08:40:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-12-14 08:40:02,049 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 40 [2022-12-14 08:40:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:40:02,050 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-12-14 08:40:02,050 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 08:40:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-12-14 08:40:02,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 08:40:02,052 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:40:02,052 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 08:40:02,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:40:02,053 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:40:02,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:40:02,054 INFO L85 PathProgramCache]: Analyzing trace with hash 805675563, now seen corresponding path program 1 times [2022-12-14 08:40:02,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:40:02,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306076855] [2022-12-14 08:40:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:40:02,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:40:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:40:04,081 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 08:40:04,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:40:04,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306076855] [2022-12-14 08:40:04,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306076855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:40:04,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:40:04,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-14 08:40:04,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431812832] [2022-12-14 08:40:04,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:40:04,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 08:40:04,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:40:04,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 08:40:04,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:40:04,085 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 5 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 08:40:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:40:05,546 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2022-12-14 08:40:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 08:40:05,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 5 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 08:40:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:40:05,548 INFO L225 Difference]: With dead ends: 89 [2022-12-14 08:40:05,548 INFO L226 Difference]: Without dead ends: 87 [2022-12-14 08:40:05,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-14 08:40:05,550 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:40:05,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 442 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 08:40:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-14 08:40:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2022-12-14 08:40:05,559 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 08:40:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-12-14 08:40:05,560 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 42 [2022-12-14 08:40:05,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:40:05,560 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-12-14 08:40:05,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 5 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 08:40:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-12-14 08:40:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 08:40:05,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:40:05,561 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 08:40:05,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:40:05,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:40:05,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:40:05,562 INFO L85 PathProgramCache]: Analyzing trace with hash 114807129, now seen corresponding path program 1 times [2022-12-14 08:40:05,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:40:05,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951938135] [2022-12-14 08:40:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:40:05,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:40:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:40:08,556 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 08:40:08,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:40:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951938135] [2022-12-14 08:40:08,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951938135] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:40:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35596890] [2022-12-14 08:40:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:40:08,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:40:08,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:40:08,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:40:08,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:40:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:40:08,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 08:40:09,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:40:09,157 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 08:40:09,163 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 08:40:09,166 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 08:40:12,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:40:12,294 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 08:40:12,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:40:12,304 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 08:40:12,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:40:12,313 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 08:40:12,427 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 08:40:12,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:40:12,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35596890] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:40:12,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:40:12,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [16] total 32 [2022-12-14 08:40:12,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260278834] [2022-12-14 08:40:12,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:40:12,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 08:40:12,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:40:12,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 08:40:12,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2022-12-14 08:40:12,430 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 18 states, 10 states have (on average 2.5) internal successors, (25), 14 states have internal predecessors, (25), 8 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 08:40:16,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 08:40:18,138 WARN L539 Checker$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 08:40:20,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 08:40:22,161 WARN L539 Checker$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 08:40:24,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 08:40:26,514 WARN L539 Checker$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 08:40:28,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 08:40:31,026 WARN L539 Checker$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 08:40:33,132 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 08:40:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:40:33,248 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2022-12-14 08:40:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 08:40:33,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 10 states have (on average 2.5) internal successors, (25), 14 states have internal predecessors, (25), 8 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 08:40:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:40:33,250 INFO L225 Difference]: With dead ends: 114 [2022-12-14 08:40:33,250 INFO L226 Difference]: Without dead ends: 112 [2022-12-14 08:40:33,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=161, Invalid=1645, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 08:40:33,251 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 104 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 79 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:40:33,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 368 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 760 Invalid, 9 Unknown, 0 Unchecked, 20.3s Time] [2022-12-14 08:40:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-14 08:40:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2022-12-14 08:40:33,266 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 08:40:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-12-14 08:40:33,267 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 46 [2022-12-14 08:40:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:40:33,268 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-12-14 08:40:33,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 10 states have (on average 2.5) internal successors, (25), 14 states have internal predecessors, (25), 8 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 08:40:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-12-14 08:40:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 08:40:33,268 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:40:33,269 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 08:40:33,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:40:33,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:40:33,469 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:40:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:40:33,470 INFO L85 PathProgramCache]: Analyzing trace with hash 44571163, now seen corresponding path program 1 times [2022-12-14 08:40:33,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:40:33,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477112734] [2022-12-14 08:40:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:40:33,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:40:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:40:33,653 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 08:40:33,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:40:33,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477112734] [2022-12-14 08:40:33,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477112734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:40:33,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:40:33,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:40:33,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046473984] [2022-12-14 08:40:33,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:40:33,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:40:33,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:40:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:40:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:40:33,655 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 08:40:34,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:40:34,075 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-12-14 08:40:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:40:34,075 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 08:40:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:40:34,077 INFO L225 Difference]: With dead ends: 138 [2022-12-14 08:40:34,077 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 08:40:34,077 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 08:40:34,078 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:40:34,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:40:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 08:40:34,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-12-14 08:40:34,097 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 08:40:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2022-12-14 08:40:34,099 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 45 [2022-12-14 08:40:34,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:40:34,099 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2022-12-14 08:40:34,099 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 08:40:34,099 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2022-12-14 08:40:34,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 08:40:34,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:40:34,100 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 08:40:34,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:40:34,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:40:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:40:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash -133663699, now seen corresponding path program 1 times [2022-12-14 08:40:34,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:40:34,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210271034] [2022-12-14 08:40:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:40:34,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:40:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:40:36,718 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 08:40:36,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:40:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210271034] [2022-12-14 08:40:36,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210271034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:40:36,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699458506] [2022-12-14 08:40:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:40:36,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:40:36,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:40:36,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:40:36,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18aff5ad-77fa-43cc-af29-c359e99d0015/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:40:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:40:37,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 08:40:37,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:40:37,227 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 13 treesize of output 9 [2022-12-14 08:40:37,232 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 08:40:37,234 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 13 treesize of output 9 [2022-12-14 08:40:37,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:40:37,911 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 08:40:37,911 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 60 treesize of output 46 [2022-12-14 08:40:37,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:40:37,919 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-12-14 08:40:37,920 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 46 treesize of output 35 [2022-12-14 08:40:38,246 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 08:40:38,246 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 46 treesize of output 26 [2022-12-14 08:40:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:40:38,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:40:39,159 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2022-12-14 08:40:50,196 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.