./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba --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 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd --- 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-b5237d8 [2022-11-22 01:55:08,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:55:08,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:55:08,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:55:08,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:55:08,217 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:55:08,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:55:08,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:55:08,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:55:08,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:55:08,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:55:08,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:55:08,237 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:55:08,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:55:08,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:55:08,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:55:08,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:55:08,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:55:08,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:55:08,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:55:08,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:55:08,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:55:08,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:55:08,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:55:08,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:55:08,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:55:08,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:55:08,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:55:08,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:55:08,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:55:08,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:55:08,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:55:08,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:55:08,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:55:08,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:55:08,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:55:08,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:55:08,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:55:08,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:55:08,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:55:08,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:55:08,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 01:55:08,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:55:08,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:55:08,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:55:08,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:55:08,343 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:55:08,344 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:55:08,344 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:55:08,344 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:55:08,344 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:55:08,344 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:55:08,345 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:55:08,346 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:55:08,346 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:55:08,346 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:55:08,346 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:55:08,347 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:55:08,347 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:55:08,347 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:55:08,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:55:08,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:55:08,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:55:08,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:55:08,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:55:08,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:55:08,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:55:08,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:55:08,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:55:08,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:55:08,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:55:08,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:55:08,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:55:08,351 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:55:08,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:55:08,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:55:08,352 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:55:08,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:55:08,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:55:08,353 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:55:08,353 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_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd [2022-11-22 01:55:08,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:55:08,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:55:08,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:55:08,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:55:08,716 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:55:08,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2022-11-22 01:55:11,985 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:55:12,675 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:55:12,676 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2022-11-22 01:55:12,722 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/data/8be915ebf/7e0e4294b1054557b5402240a3a53706/FLAGb2d279b8e [2022-11-22 01:55:12,742 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/data/8be915ebf/7e0e4294b1054557b5402240a3a53706 [2022-11-22 01:55:12,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:55:12,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:55:12,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:55:12,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:55:12,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:55:12,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:55:12" (1/1) ... [2022-11-22 01:55:12,756 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570bb56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:12, skipping insertion in model container [2022-11-22 01:55:12,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:55:12" (1/1) ... [2022-11-22 01:55:12,764 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:55:12,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:55:13,142 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2022-11-22 01:55:13,154 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_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2022-11-22 01:55:14,318 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:14,319 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:14,320 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:14,321 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:14,322 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:14,336 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:14,337 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:14,339 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:14,340 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:14,869 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:55:14,870 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:55:14,871 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:55:14,873 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:55:14,874 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:55:14,875 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:55:14,876 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:55:14,877 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:55:14,877 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:55:14,878 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:55:15,110 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:55:15,239 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,239 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:55:15,362 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:55:15,375 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_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2022-11-22 01:55:15,376 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_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2022-11-22 01:55:15,412 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,412 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,413 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,413 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,413 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,420 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,421 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,422 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,422 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,468 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-22 01:55:15,473 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-22 01:55:15,474 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-22 01:55:15,475 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-22 01:55:15,476 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-22 01:55:15,477 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-22 01:55:15,477 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-22 01:55:15,478 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-22 01:55:15,479 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-22 01:55:15,479 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-22 01:55:15,522 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-22 01:55:15,605 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,606 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-22 01:55:15,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:55:15,946 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:55:15,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15 WrapperNode [2022-11-22 01:55:15,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:55:15,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:55:15,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:55:15,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:55:15,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,191 INFO L138 Inliner]: procedures = 691, calls = 2630, calls flagged for inlining = 59, calls inlined = 7, statements flattened = 815 [2022-11-22 01:55:16,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:55:16,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:55:16,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:55:16,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:55:16,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,267 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:55:16,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:55:16,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:55:16,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:55:16,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (1/1) ... [2022-11-22 01:55:16,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:55:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:16,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:55:16,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:55:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2022-11-22 01:55:16,392 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2022-11-22 01:55:16,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:55:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2022-11-22 01:55:16,393 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2022-11-22 01:55:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:55:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-22 01:55:16,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-22 01:55:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2022-11-22 01:55:16,395 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2022-11-22 01:55:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:55:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:55:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 01:55:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:55:16,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:55:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2022-11-22 01:55:16,397 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2022-11-22 01:55:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 01:55:16,397 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 01:55:16,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:55:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 01:55:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 01:55:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2022-11-22 01:55:16,398 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2022-11-22 01:55:16,398 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2022-11-22 01:55:16,398 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2022-11-22 01:55:16,399 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-22 01:55:16,399 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-22 01:55:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:55:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2022-11-22 01:55:16,400 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2022-11-22 01:55:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2022-11-22 01:55:16,400 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2022-11-22 01:55:16,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:55:16,786 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:55:16,788 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:55:18,173 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:55:18,581 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:55:18,581 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:55:18,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:55:18 BoogieIcfgContainer [2022-11-22 01:55:18,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:55:18,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:55:18,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:55:18,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:55:18,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:55:12" (1/3) ... [2022-11-22 01:55:18,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171bc01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:55:18, skipping insertion in model container [2022-11-22 01:55:18,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:55:15" (2/3) ... [2022-11-22 01:55:18,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171bc01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:55:18, skipping insertion in model container [2022-11-22 01:55:18,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:55:18" (3/3) ... [2022-11-22 01:55:18,593 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reset_harness.i [2022-11-22 01:55:18,614 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:55:18,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:55:18,665 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:55:18,672 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;@1b8cf352, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:55:18,672 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:55:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-22 01:55:18,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 01:55:18,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:18,686 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:55:18,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:55:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:18,693 INFO L85 PathProgramCache]: Analyzing trace with hash 2135767528, now seen corresponding path program 1 times [2022-11-22 01:55:18,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:18,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652487134] [2022-11-22 01:55:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:18,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:55:21,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:21,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652487134] [2022-11-22 01:55:21,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652487134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:21,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:21,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:55:21,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130930207] [2022-11-22 01:55:21,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:21,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:55:21,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:21,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:55:21,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:55:21,274 INFO L87 Difference]: Start difference. First operand has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 01:55:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:22,175 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2022-11-22 01:55:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:55:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31 [2022-11-22 01:55:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:22,186 INFO L225 Difference]: With dead ends: 121 [2022-11-22 01:55:22,186 INFO L226 Difference]: Without dead ends: 79 [2022-11-22 01:55:22,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:55:22,193 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 14 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 354 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:55:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-22 01:55:22,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-22 01:55:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-22 01:55:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2022-11-22 01:55:22,242 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 31 [2022-11-22 01:55:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:22,243 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2022-11-22 01:55:22,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-22 01:55:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2022-11-22 01:55:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 01:55:22,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:22,246 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-22 01:55:22,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:55:22,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:55:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:22,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2101338410, now seen corresponding path program 1 times [2022-11-22 01:55:22,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:22,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813609969] [2022-11-22 01:55:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:22,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:25,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:55:25,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:25,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813609969] [2022-11-22 01:55:25,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813609969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:25,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:25,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-22 01:55:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785925563] [2022-11-22 01:55:25,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:25,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:55:25,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:55:25,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:55:25,174 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 01:55:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:26,957 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-11-22 01:55:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:55:26,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-11-22 01:55:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:26,960 INFO L225 Difference]: With dead ends: 96 [2022-11-22 01:55:26,960 INFO L226 Difference]: Without dead ends: 94 [2022-11-22 01:55:26,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:55:26,961 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:26,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 110 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:55:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-22 01:55:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-11-22 01:55:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-22 01:55:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2022-11-22 01:55:26,978 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 37 [2022-11-22 01:55:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:26,978 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2022-11-22 01:55:26,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-22 01:55:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2022-11-22 01:55:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 01:55:26,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:26,981 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] [2022-11-22 01:55:26,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:55:26,981 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:55:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash 257990555, now seen corresponding path program 1 times [2022-11-22 01:55:26,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:26,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137038679] [2022-11-22 01:55:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:26,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:55:35,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:35,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137038679] [2022-11-22 01:55:35,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137038679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:35,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:35,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-22 01:55:35,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287000148] [2022-11-22 01:55:35,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:35,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 01:55:35,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 01:55:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:55:35,077 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 13 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 01:55:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:37,161 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2022-11-22 01:55:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:55:37,162 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), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 44 [2022-11-22 01:55:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:37,165 INFO L225 Difference]: With dead ends: 98 [2022-11-22 01:55:37,165 INFO L226 Difference]: Without dead ends: 96 [2022-11-22 01:55:37,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:55:37,166 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 40 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:37,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 582 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 01:55:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-22 01:55:37,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-11-22 01:55:37,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 27 states have call successors, (27), 14 states have call predecessors, (27), 13 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-22 01:55:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2022-11-22 01:55:37,183 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 44 [2022-11-22 01:55:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:37,184 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2022-11-22 01:55:37,184 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), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-22 01:55:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2022-11-22 01:55:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 01:55:37,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:37,186 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-22 01:55:37,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:55:37,186 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:55:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:37,187 INFO L85 PathProgramCache]: Analyzing trace with hash -418782654, now seen corresponding path program 1 times [2022-11-22 01:55:37,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:37,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064251147] [2022-11-22 01:55:37,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:37,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:55:39,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:39,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064251147] [2022-11-22 01:55:39,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064251147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:39,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:39,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:55:39,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26123037] [2022-11-22 01:55:39,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:39,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:55:39,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:39,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:55:39,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:55:39,358 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 01:55:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:40,486 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2022-11-22 01:55:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:55:40,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2022-11-22 01:55:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:40,488 INFO L225 Difference]: With dead ends: 107 [2022-11-22 01:55:40,488 INFO L226 Difference]: Without dead ends: 105 [2022-11-22 01:55:40,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:55:40,489 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 29 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:40,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 420 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:55:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-22 01:55:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-11-22 01:55:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.105263157894737) internal successors, (63), 60 states have internal predecessors, (63), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-22 01:55:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2022-11-22 01:55:40,508 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 43 [2022-11-22 01:55:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:40,509 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2022-11-22 01:55:40,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-22 01:55:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2022-11-22 01:55:40,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 01:55:40,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:40,511 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 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] [2022-11-22 01:55:40,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:55:40,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:55:40,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:40,513 INFO L85 PathProgramCache]: Analyzing trace with hash -463655508, now seen corresponding path program 1 times [2022-11-22 01:55:40,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:40,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463291253] [2022-11-22 01:55:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:40,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:55:42,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:42,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463291253] [2022-11-22 01:55:42,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463291253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:42,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:42,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-22 01:55:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465783880] [2022-11-22 01:55:42,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:42,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:55:42,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:55:42,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:55:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:55:42,489 INFO L87 Difference]: Start difference. First operand 100 states and 117 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:55:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:43,670 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2022-11-22 01:55:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:55:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 49 [2022-11-22 01:55:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:43,672 INFO L225 Difference]: With dead ends: 111 [2022-11-22 01:55:43,672 INFO L226 Difference]: Without dead ends: 109 [2022-11-22 01:55:43,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:55:43,674 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 29 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:43,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 419 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:55:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-22 01:55:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2022-11-22 01:55:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 61 states have (on average 1.098360655737705) internal successors, (67), 64 states have internal predecessors, (67), 29 states have call successors, (29), 16 states have call predecessors, (29), 15 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-22 01:55:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2022-11-22 01:55:43,693 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 49 [2022-11-22 01:55:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:43,694 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2022-11-22 01:55:43,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-22 01:55:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2022-11-22 01:55:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 01:55:43,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:43,697 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:55:43,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:55:43,697 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:55:43,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1351434591, now seen corresponding path program 1 times [2022-11-22 01:55:43,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:55:43,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043752521] [2022-11-22 01:55:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:55:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 01:55:50,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:55:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043752521] [2022-11-22 01:55:50,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043752521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:55:50,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830221994] [2022-11-22 01:55:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:50,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:50,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:50,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:50,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_38b0a7ff-d68b-4e76-9127-8577a27b2b9f/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:55:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:50,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-22 01:55:50,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:51,181 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 [2022-11-22 01:55:51,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-22 01:55:54,059 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:55:54,066 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-22 01:55:54,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-22 01:55:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:54,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:55:54,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 16 [2022-11-22 01:55:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:55:55,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:59,168 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2022-11-22 02:04:25,963 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.