./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 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/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_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 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-38b53e6 [2022-11-26 00:33:45,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:33:45,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:33:45,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:33:45,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:33:45,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:33:45,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:33:45,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:33:45,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:33:45,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:33:45,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:33:45,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:33:45,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:33:45,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:33:45,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:33:45,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:33:45,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:33:45,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:33:45,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:33:45,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:33:45,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:33:45,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:33:45,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:33:45,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:33:45,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:33:45,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:33:45,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:33:45,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:33:45,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:33:45,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:33:45,310 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:33:45,311 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:33:45,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:33:45,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:33:45,313 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:33:45,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:33:45,314 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:33:45,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:33:45,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:33:45,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:33:45,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:33:45,318 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 00:33:45,342 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:33:45,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:33:45,343 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:33:45,343 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:33:45,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:33:45,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:33:45,344 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:33:45,344 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:33:45,345 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:33:45,345 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:33:45,345 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:33:45,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:33:45,346 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:33:45,346 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:33:45,346 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:33:45,346 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:33:45,347 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:33:45,347 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:33:45,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:33:45,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:33:45,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:33:45,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:33:45,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:33:45,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:33:45,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:33:45,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:33:45,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:33:45,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:33:45,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:33:45,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:33:45,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:33:45,351 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:33:45,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:33:45,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:33:45,352 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:33:45,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:33:45,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:33:45,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:33:45,353 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_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21e14c4abf3c8c626ff1e4d64bac7246a96ab8c19ab8b6f263006a7e1f8fc191 [2022-11-26 00:33:45,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:33:45,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:33:45,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:33:45,638 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:33:45,638 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:33:45,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2022-11-26 00:33:48,666 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:33:49,118 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:33:49,118 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i [2022-11-26 00:33:49,171 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/data/ac271ef0c/8ce111e16de8415a827d71b714fcc650/FLAG0b04f45b0 [2022-11-26 00:33:49,191 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/data/ac271ef0c/8ce111e16de8415a827d71b714fcc650 [2022-11-26 00:33:49,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:33:49,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:33:49,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:33:49,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:33:49,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:33:49,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:33:49" (1/1) ... [2022-11-26 00:33:49,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44ab9bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:49, skipping insertion in model container [2022-11-26 00:33:49,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:33:49" (1/1) ... [2022-11-26 00:33:49,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:33:49,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:33:49,636 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_14c632a9-d3ac-490a-8b30-5024478c9e80/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2022-11-26 00:33:49,645 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_14c632a9-d3ac-490a-8b30-5024478c9e80/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2022-11-26 00:33:50,730 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:50,731 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:50,732 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:50,733 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:50,734 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:50,749 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:50,749 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:50,752 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:50,753 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:50,889 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:33:50,889 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:33:50,890 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:33:50,896 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:33:50,900 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:33:50,901 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:33:51,274 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:33:51,275 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:33:51,277 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:33:51,278 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:33:51,279 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:33:51,281 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:33:51,282 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:33:51,282 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:33:51,283 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:33:51,284 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:33:51,285 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:33:51,453 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:33:51,508 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-26 00:33:51,519 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:33:51,578 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:33:51,591 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,592 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,685 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-26 00:33:51,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:33:51,768 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:33:51,795 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_14c632a9-d3ac-490a-8b30-5024478c9e80/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4504,4517] [2022-11-26 00:33:51,795 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_14c632a9-d3ac-490a-8b30-5024478c9e80/sv-benchmarks/c/aws-c-common/aws_byte_cursor_satisfies_pred_harness.i[4564,4577] [2022-11-26 00:33:51,848 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,849 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,849 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,850 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,851 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,862 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,863 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,864 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,864 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:51,875 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:33:51,876 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:33:51,877 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:33:51,880 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:33:51,884 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:33:51,884 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:33:51,918 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:33:51,919 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:33:51,920 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:33:51,921 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:33:51,922 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:33:51,923 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:33:51,923 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:33:51,924 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:33:51,924 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:33:51,925 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:33:51,928 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:33:51,962 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:33:52,003 WARN L623 FunctionHandler]: Unknown extern function memchr [2022-11-26 00:33:52,023 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:33:52,043 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:33:52,055 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:52,055 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:33:52,086 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-11-26 00:33:52,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:33:52,355 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:33:52,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52 WrapperNode [2022-11-26 00:33:52,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:33:52,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:33:52,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:33:52,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:33:52,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,538 INFO L138 Inliner]: procedures = 690, calls = 2613, calls flagged for inlining = 62, calls inlined = 9, statements flattened = 810 [2022-11-26 00:33:52,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:33:52,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:33:52,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:33:52,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:33:52,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,631 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:33:52,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:33:52,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:33:52,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:33:52,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (1/1) ... [2022-11-26 00:33:52,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:33:52,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:33:52,708 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:33:52,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:33:52,762 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2022-11-26 00:33:52,763 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2022-11-26 00:33:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:33:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-26 00:33:52,764 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-26 00:33:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:33:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:33:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:33:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_left_trim_pred [2022-11-26 00:33:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_left_trim_pred [2022-11-26 00:33:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:33:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:33:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:33:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:33:52,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:33:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-26 00:33:52,766 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-26 00:33:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2022-11-26 00:33:52,767 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2022-11-26 00:33:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:33:52,767 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:33:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:33:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:33:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:33:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~uint8_t~0~TO~int [2022-11-26 00:33:52,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~uint8_t~0~TO~int [2022-11-26 00:33:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:33:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:33:53,091 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:33:53,093 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:33:54,602 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:33:54,840 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:33:54,841 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:33:54,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:33:54 BoogieIcfgContainer [2022-11-26 00:33:54,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:33:54,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:33:54,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:33:54,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:33:54,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:33:49" (1/3) ... [2022-11-26 00:33:54,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379fcd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:33:54, skipping insertion in model container [2022-11-26 00:33:54,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:33:52" (2/3) ... [2022-11-26 00:33:54,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379fcd0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:33:54, skipping insertion in model container [2022-11-26 00:33:54,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:33:54" (3/3) ... [2022-11-26 00:33:54,855 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_cursor_satisfies_pred_harness.i [2022-11-26 00:33:54,875 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:33:54,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:33:54,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:33:54,948 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;@4f3c360e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:33:54,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:33:54,953 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) [2022-11-26 00:33:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:33:54,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:54,969 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] [2022-11-26 00:33:54,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:54,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2120443845, now seen corresponding path program 1 times [2022-11-26 00:33:54,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:54,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636589632] [2022-11-26 00:33:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:54,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:55,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:33:55,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:55,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636589632] [2022-11-26 00:33:55,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636589632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:33:55,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:33:55,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:33:55,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707918095] [2022-11-26 00:33:55,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:33:55,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:33:55,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:55,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:33:55,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:33:55,745 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) [2022-11-26 00:33:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:33:56,020 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-11-26 00:33:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:33:56,023 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 [2022-11-26 00:33:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:33:56,033 INFO L225 Difference]: With dead ends: 103 [2022-11-26 00:33:56,034 INFO L226 Difference]: Without dead ends: 64 [2022-11-26 00:33:56,037 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 [2022-11-26 00:33:56,045 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-11-26 00:33:56,046 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] [2022-11-26 00:33:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-26 00:33:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-26 00:33:56,096 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) [2022-11-26 00:33:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2022-11-26 00:33:56,102 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 40 [2022-11-26 00:33:56,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:33:56,104 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2022-11-26 00:33:56,105 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) [2022-11-26 00:33:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2022-11-26 00:33:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:33:56,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:33:56,109 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] [2022-11-26 00:33:56,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:33:56,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:33:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:33:56,111 INFO L85 PathProgramCache]: Analyzing trace with hash -281444016, now seen corresponding path program 1 times [2022-11-26 00:33:56,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:33:56,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255304515] [2022-11-26 00:33:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:33:56,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:33:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:33:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:33:59,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:33:59,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255304515] [2022-11-26 00:33:59,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255304515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:33:59,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:33:59,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-26 00:33:59,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196272812] [2022-11-26 00:33:59,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:33:59,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:33:59,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:33:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:33:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:33:59,445 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) [2022-11-26 00:34:01,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:01,580 INFO L93 Difference]: Finished difference Result 89 states and 117 transitions. [2022-11-26 00:34:01,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:34:01,581 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 [2022-11-26 00:34:01,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:01,584 INFO L225 Difference]: With dead ends: 89 [2022-11-26 00:34:01,584 INFO L226 Difference]: Without dead ends: 87 [2022-11-26 00:34:01,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:34:01,585 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 57 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:01,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 442 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 00:34:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-26 00:34:01,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2022-11-26 00:34:01,606 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) [2022-11-26 00:34:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-11-26 00:34:01,612 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 42 [2022-11-26 00:34:01,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:01,613 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-11-26 00:34:01,613 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) [2022-11-26 00:34:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-11-26 00:34:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:34:01,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:01,617 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] [2022-11-26 00:34:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:34:01,618 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:01,627 INFO L85 PathProgramCache]: Analyzing trace with hash 323235964, now seen corresponding path program 1 times [2022-11-26 00:34:01,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:01,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44373775] [2022-11-26 00:34:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:01,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:34:07,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:07,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44373775] [2022-11-26 00:34:07,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44373775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:07,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757874621] [2022-11-26 00:34:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:07,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:07,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:07,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:34:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:07,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-26 00:34:07,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:08,072 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 [2022-11-26 00:34:08,081 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 [2022-11-26 00:34:13,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:34:13,343 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 [2022-11-26 00:34:13,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:34:13,363 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 [2022-11-26 00:34:13,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:34:13,384 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 [2022-11-26 00:34:13,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:34:13,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:34:13,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757874621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:13,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:34:13,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [15] total 31 [2022-11-26 00:34:13,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727003528] [2022-11-26 00:34:13,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:13,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:34:13,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:13,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:34:13,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:34:13,549 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) [2022-11-26 00:34:17,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:20,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:22,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:24,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:26,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:28,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:30,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:33,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:34:35,666 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] [2022-11-26 00:34:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:35,833 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2022-11-26 00:34:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:34:35,834 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 [2022-11-26 00:34:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:35,836 INFO L225 Difference]: With dead ends: 114 [2022-11-26 00:34:35,836 INFO L226 Difference]: Without dead ends: 112 [2022-11-26 00:34:35,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=157, Invalid=1565, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:34:35,837 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 108 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 83 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:35,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 364 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 806 Invalid, 9 Unknown, 0 Unchecked, 21.5s Time] [2022-11-26 00:34:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-26 00:34:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2022-11-26 00:34:35,874 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) [2022-11-26 00:34:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-11-26 00:34:35,876 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 46 [2022-11-26 00:34:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:35,877 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-11-26 00:34:35,878 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) [2022-11-26 00:34:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-11-26 00:34:35,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 00:34:35,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:35,884 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] [2022-11-26 00:34:35,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:36,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:36,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:36,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:36,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2013572310, now seen corresponding path program 1 times [2022-11-26 00:34:36,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:36,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585715030] [2022-11-26 00:34:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:34:36,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:36,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585715030] [2022-11-26 00:34:36,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585715030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:36,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:36,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:34:36,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622296111] [2022-11-26 00:34:36,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:36,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:36,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:34:36,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:36,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:36,351 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) [2022-11-26 00:34:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:36,641 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-11-26 00:34:36,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:36,642 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 [2022-11-26 00:34:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:36,644 INFO L225 Difference]: With dead ends: 138 [2022-11-26 00:34:36,644 INFO L226 Difference]: Without dead ends: 104 [2022-11-26 00:34:36,645 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 [2022-11-26 00:34:36,645 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:36,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 135 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:34:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-26 00:34:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-11-26 00:34:36,669 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) [2022-11-26 00:34:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2022-11-26 00:34:36,671 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 45 [2022-11-26 00:34:36,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:36,671 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2022-11-26 00:34:36,671 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) [2022-11-26 00:34:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2022-11-26 00:34:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 00:34:36,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:36,673 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] [2022-11-26 00:34:36,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:34:36,673 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:34:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:36,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1352950230, now seen corresponding path program 1 times [2022-11-26 00:34:36,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:34:36,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522067677] [2022-11-26 00:34:36,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:36,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:34:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:34:42,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:34:42,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522067677] [2022-11-26 00:34:42,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522067677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:34:42,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003519045] [2022-11-26 00:34:42,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:42,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:42,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:42,388 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:42,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14c632a9-d3ac-490a-8b30-5024478c9e80/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:34:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-26 00:34:42,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:43,101 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 [2022-11-26 00:34:43,106 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 [2022-11-26 00:34:43,112 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 [2022-11-26 00:34:44,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:44,260 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 00:34:44,260 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 [2022-11-26 00:34:44,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:34:44,273 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-11-26 00:34:44,274 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 [2022-11-26 00:34:44,824 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:34:44,824 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 [2022-11-26 00:34:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:34:44,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:46,328 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2022-11-26 00:35:00,119 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.