./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/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_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V --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 --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:28:02,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:28:02,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:28:02,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:28:02,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:28:02,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:28:02,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:28:02,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:28:02,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:28:02,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:28:02,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:28:02,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:28:02,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:28:02,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:28:02,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:28:02,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:28:02,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:28:02,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:28:02,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:28:02,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:28:02,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:28:02,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:28:02,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:28:02,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:28:02,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:28:02,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:28:02,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:28:02,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:28:02,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:28:02,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:28:02,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:28:02,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:28:02,860 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:28:02,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:28:02,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:28:02,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:28:02,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:28:02,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:28:02,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:28:02,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:28:02,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:28:02,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:28:02,919 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:28:02,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:28:02,920 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:28:02,921 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:28:02,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:28:02,922 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:28:02,922 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:28:02,922 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:28:02,923 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:28:02,923 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:28:02,924 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:28:02,924 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:28:02,924 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:28:02,925 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:28:02,925 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:28:02,925 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:28:02,925 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:28:02,926 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:28:02,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:28:02,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:28:02,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:28:02,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:28:02,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:28:02,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:28:02,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:28:02,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:28:02,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:28:02,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:28:02,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:28:02,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:28:02,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:28:02,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:28:02,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:28:02,934 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:28:02,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:28:02,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:28:02,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:28:02,935 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:28:02,935 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd [2021-11-23 02:28:03,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:28:03,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:28:03,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:28:03,264 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:28:03,265 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:28:03,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2021-11-23 02:28:03,337 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data/08ee62880/e8aa5935ada74f2ea7b7c30e3eb0b998/FLAGd7e45d935 [2021-11-23 02:28:04,188 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:28:04,188 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2021-11-23 02:28:04,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data/08ee62880/e8aa5935ada74f2ea7b7c30e3eb0b998/FLAGd7e45d935 [2021-11-23 02:28:04,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/data/08ee62880/e8aa5935ada74f2ea7b7c30e3eb0b998 [2021-11-23 02:28:04,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:28:04,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:28:04,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:28:04,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:28:04,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:28:04,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:04" (1/1) ... [2021-11-23 02:28:04,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b9825ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:04, skipping insertion in model container [2021-11-23 02:28:04,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:28:04" (1/1) ... [2021-11-23 02:28:04,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:28:04,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:28:05,158 WARN L230 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_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2021-11-23 02:28:05,165 WARN L230 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_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2021-11-23 02:28:06,156 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,157 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,158 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,159 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,160 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,174 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,177 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,178 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,672 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:28:06,673 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:28:06,674 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:28:06,676 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:28:06,677 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:28:06,678 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:28:06,679 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:28:06,680 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:28:06,680 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:28:06,681 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:28:06,882 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:28:06,989 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:06,990 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:28:07,212 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:28:07,243 WARN L230 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_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2021-11-23 02:28:07,244 WARN L230 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_e2badd96-4d08-4492-8908-d6afc4710363/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2021-11-23 02:28:07,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,304 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,304 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,305 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,306 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,318 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,319 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,320 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,321 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,379 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-23 02:28:07,380 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-23 02:28:07,381 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-23 02:28:07,382 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-23 02:28:07,383 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-23 02:28:07,384 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-23 02:28:07,384 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-23 02:28:07,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-23 02:28:07,385 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-23 02:28:07,391 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-23 02:28:07,427 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-23 02:28:07,515 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,516 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-23 02:28:07,558 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:28:07,896 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:28:07,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07 WrapperNode [2021-11-23 02:28:07,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:28:07,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:28:07,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:28:07,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:28:07,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,167 INFO L137 Inliner]: procedures = 691, calls = 2631, calls flagged for inlining = 59, calls inlined = 7, statements flattened = 816 [2021-11-23 02:28:08,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:28:08,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:28:08,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:28:08,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:28:08,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:28:08,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:28:08,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:28:08,307 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:28:08,308 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (1/1) ... [2021-11-23 02:28:08,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:28:08,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:08,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:28:08,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:28:08,422 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-23 02:28:08,423 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-23 02:28:08,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:28:08,424 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-23 02:28:08,425 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-23 02:28:08,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:28:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 02:28:08,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 02:28:08,426 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2021-11-23 02:28:08,426 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2021-11-23 02:28:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:28:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:28:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:28:08,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:28:08,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:28:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-23 02:28:08,428 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-23 02:28:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:28:08,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:28:08,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:28:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:28:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:28:08,429 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-23 02:28:08,430 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-23 02:28:08,431 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2021-11-23 02:28:08,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2021-11-23 02:28:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-23 02:28:08,432 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-23 02:28:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:28:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2021-11-23 02:28:08,432 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2021-11-23 02:28:08,432 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2021-11-23 02:28:08,433 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2021-11-23 02:28:08,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:28:08,744 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:28:08,753 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:28:10,331 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:28:10,562 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:28:10,562 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:28:10,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:28:10 BoogieIcfgContainer [2021-11-23 02:28:10,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:28:10,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:28:10,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:28:10,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:28:10,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:28:04" (1/3) ... [2021-11-23 02:28:10,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178de6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:28:10, skipping insertion in model container [2021-11-23 02:28:10,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:28:07" (2/3) ... [2021-11-23 02:28:10,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178de6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:28:10, skipping insertion in model container [2021-11-23 02:28:10,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:28:10" (3/3) ... [2021-11-23 02:28:10,574 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reset_harness.i [2021-11-23 02:28:10,580 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:28:10,580 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:28:10,630 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:28:10,637 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:28:10,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:28:10,658 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) [2021-11-23 02:28:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:28:10,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:10,665 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:10,665 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:10,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash 2135767528, now seen corresponding path program 1 times [2021-11-23 02:28:10,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:10,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393141684] [2021-11-23 02:28:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:10,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:28:11,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:11,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393141684] [2021-11-23 02:28:11,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393141684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:11,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:11,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:28:11,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990856292] [2021-11-23 02:28:11,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:11,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:28:11,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:11,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:28:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:28:11,589 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) [2021-11-23 02:28:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:12,471 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2021-11-23 02:28:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:12,475 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 [2021-11-23 02:28:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:12,492 INFO L225 Difference]: With dead ends: 121 [2021-11-23 02:28:12,493 INFO L226 Difference]: Without dead ends: 79 [2021-11-23 02:28:12,497 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:12,506 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 13 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:12,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 362 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:28:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-23 02:28:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-23 02:28:12,599 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) [2021-11-23 02:28:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-11-23 02:28:12,607 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 31 [2021-11-23 02:28:12,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:12,608 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-11-23 02:28:12,609 INFO L471 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) [2021-11-23 02:28:12,609 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-11-23 02:28:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:28:12,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:12,613 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:12,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:28:12,613 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:12,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:12,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2101338410, now seen corresponding path program 1 times [2021-11-23 02:28:12,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:12,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038096661] [2021-11-23 02:28:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:12,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:28:13,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:13,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038096661] [2021-11-23 02:28:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038096661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:13,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:13,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 02:28:13,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032028699] [2021-11-23 02:28:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:13,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:28:13,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:28:13,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:28:13,259 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) [2021-11-23 02:28:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:15,730 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2021-11-23 02:28:15,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:28:15,730 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 [2021-11-23 02:28:15,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:15,733 INFO L225 Difference]: With dead ends: 96 [2021-11-23 02:28:15,733 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 02:28:15,733 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:15,734 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 54 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:15,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 197 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:28:15,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 02:28:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-11-23 02:28:15,749 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) [2021-11-23 02:28:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-11-23 02:28:15,751 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 37 [2021-11-23 02:28:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:15,751 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-11-23 02:28:15,752 INFO L471 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) [2021-11-23 02:28:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-11-23 02:28:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:28:15,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:15,754 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:15,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:28:15,755 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:15,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash 257990555, now seen corresponding path program 1 times [2021-11-23 02:28:15,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:15,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594478313] [2021-11-23 02:28:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:15,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:28:17,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594478313] [2021-11-23 02:28:17,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594478313] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:17,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:17,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 02:28:17,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769711915] [2021-11-23 02:28:17,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:17,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:28:17,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:28:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:28:17,016 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) [2021-11-23 02:28:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:19,053 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2021-11-23 02:28:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:28:19,054 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 [2021-11-23 02:28:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:19,057 INFO L225 Difference]: With dead ends: 98 [2021-11-23 02:28:19,058 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 02:28:19,058 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:19,060 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 35 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:19,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 622 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 02:28:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 02:28:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-11-23 02:28:19,074 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) [2021-11-23 02:28:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2021-11-23 02:28:19,076 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 44 [2021-11-23 02:28:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:19,077 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2021-11-23 02:28:19,077 INFO L471 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) [2021-11-23 02:28:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2021-11-23 02:28:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:28:19,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:19,080 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:19,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:28:19,080 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:19,081 INFO L85 PathProgramCache]: Analyzing trace with hash -418782654, now seen corresponding path program 1 times [2021-11-23 02:28:19,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:19,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905316939] [2021-11-23 02:28:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:19,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:28:19,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:19,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905316939] [2021-11-23 02:28:19,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905316939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:19,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:19,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 02:28:19,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726894341] [2021-11-23 02:28:19,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:19,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:28:19,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:19,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:28:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:28:19,527 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:28:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:21,680 INFO L93 Difference]: Finished difference Result 107 states and 125 transitions. [2021-11-23 02:28:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:28:21,681 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2021-11-23 02:28:21,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:21,682 INFO L225 Difference]: With dead ends: 107 [2021-11-23 02:28:21,683 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 02:28:21,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:28:21,684 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 58 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:21,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 175 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 02:28:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 02:28:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2021-11-23 02:28:21,707 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) [2021-11-23 02:28:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 117 transitions. [2021-11-23 02:28:21,712 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 117 transitions. Word has length 43 [2021-11-23 02:28:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:21,713 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 117 transitions. [2021-11-23 02:28:21,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:28:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 117 transitions. [2021-11-23 02:28:21,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:28:21,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:21,721 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:21,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:28:21,722 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:21,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash -463655508, now seen corresponding path program 1 times [2021-11-23 02:28:21,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:21,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127657986] [2021-11-23 02:28:21,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:21,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:28:22,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:22,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127657986] [2021-11-23 02:28:22,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127657986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:22,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:22,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:28:22,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67674991] [2021-11-23 02:28:22,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:22,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:28:22,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:22,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:28:22,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:28:22,417 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) [2021-11-23 02:28:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:23,815 INFO L93 Difference]: Finished difference Result 111 states and 128 transitions. [2021-11-23 02:28:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:28:23,816 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 [2021-11-23 02:28:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:23,818 INFO L225 Difference]: With dead ends: 111 [2021-11-23 02:28:23,818 INFO L226 Difference]: Without dead ends: 109 [2021-11-23 02:28:23,818 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:28:23,819 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 28 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:23,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 432 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:28:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-23 02:28:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-11-23 02:28:23,833 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) [2021-11-23 02:28:23,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-11-23 02:28:23,835 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 49 [2021-11-23 02:28:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:23,835 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-11-23 02:28:23,836 INFO L471 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) [2021-11-23 02:28:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-11-23 02:28:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 02:28:23,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:23,838 INFO L514 BasicCegarLoop]: 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] [2021-11-23 02:28:23,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:28:23,838 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:23,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:23,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1351434591, now seen corresponding path program 1 times [2021-11-23 02:28:23,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:23,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626958879] [2021-11-23 02:28:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:23,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:28:25,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:25,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626958879] [2021-11-23 02:28:25,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626958879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:28:25,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548243306] [2021-11-23 02:28:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:25,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:28:25,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:28:25,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:28:25,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2badd96-4d08-4492-8908-d6afc4710363/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:28:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:25,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 2536 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-23 02:28:25,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:28:26,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 14 [2021-11-23 02:28:31,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 02:28:31,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:28:31,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:28:31,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:28:31,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2021-11-23 02:28:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:28:31,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:28:34,772 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time...