./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7 --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 b1e17fda858e874821809b4efef78fd91cf6fdf1723d3ff0faf91ee901e13b86 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:57:12,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:57:12,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:57:12,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:57:12,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:57:12,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:57:12,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:57:12,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:57:12,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:57:12,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:57:12,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:57:12,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:57:12,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:57:12,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:57:12,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:57:12,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:57:12,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:57:12,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:57:12,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:57:12,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:57:12,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:57:12,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:57:12,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:57:12,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:57:12,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:57:12,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:57:12,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:57:12,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:57:12,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:57:12,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:57:12,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:57:12,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:57:12,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:57:12,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:57:12,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:57:12,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:57:12,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:57:12,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:57:12,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:57:12,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:57:12,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:57:12,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 19:57:12,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:57:12,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:57:12,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:57:12,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:57:12,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:57:12,964 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:57:12,964 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:57:12,965 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:57:12,965 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:57:12,965 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:57:12,966 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:57:12,966 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:57:12,966 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:57:12,967 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:57:12,967 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:57:12,968 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:57:12,968 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:57:12,968 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:57:12,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:57:12,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:57:12,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:57:12,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:57:12,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:57:12,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:57:12,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:57:12,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:57:12,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:57:12,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:57:12,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:57:12,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:57:12,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:57:12,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:57:12,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:57:12,975 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:57:12,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:57:12,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:57:12,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:57:12,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:57:12,976 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_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e17fda858e874821809b4efef78fd91cf6fdf1723d3ff0faf91ee901e13b86 [2021-11-25 19:57:13,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:57:13,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:57:13,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:57:13,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:57:13,312 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:57:13,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i [2021-11-25 19:57:13,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/data/6c5910f53/4487ea3b18d14c32ac05f33a1c3b45f9/FLAG09855c620 [2021-11-25 19:57:14,408 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:57:14,411 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i [2021-11-25 19:57:14,470 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/data/6c5910f53/4487ea3b18d14c32ac05f33a1c3b45f9/FLAG09855c620 [2021-11-25 19:57:14,925 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/data/6c5910f53/4487ea3b18d14c32ac05f33a1c3b45f9 [2021-11-25 19:57:14,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:57:14,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:57:14,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:57:14,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:57:14,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:57:14,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:57:14" (1/1) ... [2021-11-25 19:57:14,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4edebf2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:14, skipping insertion in model container [2021-11-25 19:57:14,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:57:14" (1/1) ... [2021-11-25 19:57:14,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:57:15,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:57:15,388 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_9984880d-9c50-46d2-8cff-8dba6eacf85c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4501,4514] [2021-11-25 19:57:15,395 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_9984880d-9c50-46d2-8cff-8dba6eacf85c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4561,4574] [2021-11-25 19:57:16,400 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:16,401 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:16,402 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:16,403 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:16,404 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:16,421 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:16,422 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:16,424 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:16,425 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:16,886 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 19:57:16,888 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 19:57:16,889 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 19:57:16,891 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 19:57:16,893 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 19:57:16,894 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 19:57:16,894 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 19:57:16,895 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 19:57:16,896 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 19:57:16,897 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 19:57:17,166 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 19:57:17,194 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,195 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,284 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,284 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,368 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:57:17,439 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:57:17,455 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_9984880d-9c50-46d2-8cff-8dba6eacf85c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4501,4514] [2021-11-25 19:57:17,456 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_9984880d-9c50-46d2-8cff-8dba6eacf85c/sv-benchmarks/c/aws-c-common/aws_byte_buf_append_dynamic_harness.i[4561,4574] [2021-11-25 19:57:17,531 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,539 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,539 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,540 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,540 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,548 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,548 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,549 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,550 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 19:57:17,591 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 19:57:17,592 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 19:57:17,593 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 19:57:17,594 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 19:57:17,595 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 19:57:17,595 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 19:57:17,596 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 19:57:17,596 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 19:57:17,597 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 19:57:17,650 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 19:57:17,687 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,854 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,855 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 19:57:17,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:57:18,308 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:57:18,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18 WrapperNode [2021-11-25 19:57:18,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:57:18,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:57:18,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:57:18,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:57:18,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,620 INFO L137 Inliner]: procedures = 691, calls = 2637, calls flagged for inlining = 61, calls inlined = 11, statements flattened = 1065 [2021-11-25 19:57:18,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:57:18,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:57:18,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:57:18,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:57:18,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:57:18,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:57:18,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:57:18,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:57:18,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (1/1) ... [2021-11-25 19:57:18,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:57:18,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:57:18,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:57:18,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:57:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-25 19:57:18,908 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-25 19:57:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_cursor_is_valid [2021-11-25 19:57:18,909 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_cursor_is_valid [2021-11-25 19:57:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:57:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 19:57:18,910 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 19:57:18,910 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-25 19:57:18,910 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-25 19:57:18,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:57:18,911 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-25 19:57:18,911 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-25 19:57:18,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 19:57:18,911 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 19:57:18,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:57:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:57:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:57:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-25 19:57:18,912 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-25 19:57:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:57:18,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:57:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 19:57:18,913 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 19:57:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-25 19:57:18,914 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-25 19:57:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2021-11-25 19:57:18,914 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2021-11-25 19:57:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:57:18,914 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:57:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-25 19:57:18,915 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-25 19:57:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-11-25 19:57:18,915 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-11-25 19:57:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:57:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-25 19:57:18,916 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-25 19:57:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:57:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:57:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-25 19:57:18,917 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-25 19:57:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-25 19:57:18,917 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-25 19:57:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure assert_bytes_match [2021-11-25 19:57:18,918 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_bytes_match [2021-11-25 19:57:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 19:57:18,918 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 19:57:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:57:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:57:19,323 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:57:19,326 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:57:21,177 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:57:21,478 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:57:21,478 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:57:21,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:57:21 BoogieIcfgContainer [2021-11-25 19:57:21,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:57:21,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:57:21,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:57:21,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:57:21,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:57:14" (1/3) ... [2021-11-25 19:57:21,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad3b02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:57:21, skipping insertion in model container [2021-11-25 19:57:21,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:57:18" (2/3) ... [2021-11-25 19:57:21,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad3b02d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:57:21, skipping insertion in model container [2021-11-25 19:57:21,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:57:21" (3/3) ... [2021-11-25 19:57:21,499 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_append_dynamic_harness.i [2021-11-25 19:57:21,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:57:21,510 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:57:21,583 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:57:21,599 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 [2021-11-25 19:57:21,605 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:57:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 194 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 103 states have internal predecessors, (123), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-25 19:57:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-25 19:57:21,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:57:21,659 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:57:21,660 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:57:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:57:21,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1899896275, now seen corresponding path program 1 times [2021-11-25 19:57:21,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:57:21,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190090266] [2021-11-25 19:57:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:57:21,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:57:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:57:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:57:22,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:57:22,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190090266] [2021-11-25 19:57:22,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190090266] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:57:22,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:57:22,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:57:22,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945184020] [2021-11-25 19:57:22,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:57:22,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:57:22,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:57:22,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:57:22,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:57:22,654 INFO L87 Difference]: Start difference. First operand has 194 states, 102 states have (on average 1.2058823529411764) internal successors, (123), 103 states have internal predecessors, (123), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 19:57:22,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:57:22,832 INFO L93 Difference]: Finished difference Result 363 states and 514 transitions. [2021-11-25 19:57:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:57:22,835 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 55 [2021-11-25 19:57:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:57:22,849 INFO L225 Difference]: With dead ends: 363 [2021-11-25 19:57:22,849 INFO L226 Difference]: Without dead ends: 192 [2021-11-25 19:57:22,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:57:22,860 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:57:22,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 242 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:57:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-25 19:57:22,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-11-25 19:57:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 102 states have internal predecessors, (119), 72 states have call successors, (72), 18 states have call predecessors, (72), 18 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-11-25 19:57:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 262 transitions. [2021-11-25 19:57:22,940 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 262 transitions. Word has length 55 [2021-11-25 19:57:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:57:22,942 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 262 transitions. [2021-11-25 19:57:22,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-25 19:57:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 262 transitions. [2021-11-25 19:57:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-25 19:57:22,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:57:22,947 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:57:22,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:57:22,948 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:57:22,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:57:22,949 INFO L85 PathProgramCache]: Analyzing trace with hash 974803453, now seen corresponding path program 1 times [2021-11-25 19:57:22,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:57:22,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088310628] [2021-11-25 19:57:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:57:22,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:57:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:57:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:57:25,325 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:57:25,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088310628] [2021-11-25 19:57:25,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088310628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:57:25,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:57:25,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 19:57:25,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839260363] [2021-11-25 19:57:25,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:57:25,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:57:25,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:57:25,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:57:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:57:25,332 INFO L87 Difference]: Start difference. First operand 192 states and 262 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-25 19:57:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:57:27,432 INFO L93 Difference]: Finished difference Result 460 states and 642 transitions. [2021-11-25 19:57:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:57:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 57 [2021-11-25 19:57:27,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:57:27,451 INFO L225 Difference]: With dead ends: 460 [2021-11-25 19:57:27,451 INFO L226 Difference]: Without dead ends: 297 [2021-11-25 19:57:27,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:57:27,461 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 202 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:57:27,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 855 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 19:57:27,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-25 19:57:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 214. [2021-11-25 19:57:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 113 states have internal predecessors, (131), 83 states have call successors, (83), 18 states have call predecessors, (83), 18 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-25 19:57:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 296 transitions. [2021-11-25 19:57:27,532 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 296 transitions. Word has length 57 [2021-11-25 19:57:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:57:27,532 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 296 transitions. [2021-11-25 19:57:27,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 8 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-25 19:57:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 296 transitions. [2021-11-25 19:57:27,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-25 19:57:27,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:57:27,536 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:57:27,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:57:27,537 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:57:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:57:27,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1771125939, now seen corresponding path program 1 times [2021-11-25 19:57:27,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:57:27,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592509899] [2021-11-25 19:57:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:57:27,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:57:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:57:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:57:27,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:57:27,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592509899] [2021-11-25 19:57:27,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592509899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:57:27,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:57:27,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:57:27,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536578895] [2021-11-25 19:57:27,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:57:27,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:57:27,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:57:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:57:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:57:27,833 INFO L87 Difference]: Start difference. First operand 214 states and 296 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-25 19:57:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:57:28,033 INFO L93 Difference]: Finished difference Result 269 states and 366 transitions. [2021-11-25 19:57:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:57:28,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 59 [2021-11-25 19:57:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:57:28,037 INFO L225 Difference]: With dead ends: 269 [2021-11-25 19:57:28,037 INFO L226 Difference]: Without dead ends: 231 [2021-11-25 19:57:28,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:57:28,040 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 7 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:57:28,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1215 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:57:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-25 19:57:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 216. [2021-11-25 19:57:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 83 states have call successors, (83), 18 states have call predecessors, (83), 18 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-25 19:57:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 298 transitions. [2021-11-25 19:57:28,067 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 298 transitions. Word has length 59 [2021-11-25 19:57:28,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:57:28,068 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 298 transitions. [2021-11-25 19:57:28,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-25 19:57:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 298 transitions. [2021-11-25 19:57:28,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 19:57:28,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:57:28,072 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:57:28,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:57:28,073 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:57:28,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:57:28,074 INFO L85 PathProgramCache]: Analyzing trace with hash 360017072, now seen corresponding path program 1 times [2021-11-25 19:57:28,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:57:28,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806004067] [2021-11-25 19:57:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:57:28,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:57:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:57:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:57:30,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:57:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806004067] [2021-11-25 19:57:30,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806004067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:57:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516282728] [2021-11-25 19:57:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:57:30,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:57:30,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:57:30,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:57:30,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:57:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:57:31,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-25 19:57:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:57:31,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2021-11-25 19:57:31,572 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:57:31,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:57:31,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-25 19:57:32,189 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-25 19:57:32,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 28 [2021-11-25 19:57:36,570 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:57:36,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 43 [2021-11-25 19:58:06,555 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-25 19:58:06,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 14 [2021-11-25 19:58:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:58:06,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:07,250 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_182 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_182) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.offset| 8)) 0))) (forall ((v_ArrVal_182 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_byte_cursor_has_allocated_buffer_member_~cursor#1.base| v_ArrVal_182) |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base|) (+ |c_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset| 8)) 0)))) is different from false [2021-11-25 19:58:07,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516282728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:07,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335546514] [2021-11-25 19:58:07,299 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2021-11-25 19:58:07,299 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:58:07,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:58:07,310 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:58:07,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:58:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:12,418 INFO L244 Elim1Store]: Index analysis took 448 ms [2021-11-25 19:58:32,085 WARN L227 SmtUtils]: Spent 19.56s on a formula simplification. DAG size of input: 1776 DAG size of output: 1179 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 19:58:32,093 INFO L354 Elim1Store]: treesize reduction 1982, result has 47.1 percent of original size [2021-11-25 19:58:32,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 198 select indices, 198 select index equivalence classes, 19505 disjoint index pairs (out of 19503 index pairs), introduced 198 new quantified variables, introduced 197 case distinctions, treesize of input 997 treesize of output 2366 [2021-11-25 19:58:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:37,088 INFO L244 Elim1Store]: Index analysis took 924 ms [2021-11-25 19:59:14,322 WARN L227 SmtUtils]: Spent 37.15s on a formula simplification. DAG size of input: 2172 DAG size of output: 1185 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 19:59:14,327 INFO L354 Elim1Store]: treesize reduction 3546, result has 33.3 percent of original size [2021-11-25 19:59:14,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 200 select indices, 200 select index equivalence classes, 19703 disjoint index pairs (out of 19900 index pairs), introduced 200 new quantified variables, introduced 394 case distinctions, treesize of input 1007 treesize of output 2389 [2021-11-25 19:59:17,010 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 194 [2021-11-25 19:59:17,149 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 194 [2021-11-25 19:59:17,372 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 194 [2021-11-25 19:59:17,623 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 19 treesize of output 1 [2021-11-25 19:59:17,634 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 19 treesize of output 1 [2021-11-25 19:59:17,652 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 13 treesize of output 9 [2021-11-25 19:59:17,665 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 13 treesize of output 9 [2021-11-25 19:59:17,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-25 19:59:17,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:59:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:17,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 19:59:17,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:17,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2021-11-25 19:59:17,988 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 19 treesize of output 1 [2021-11-25 19:59:18,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:18,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 19:59:19,208 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 19:59:19,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-11-25 19:59:19,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-25 19:59:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:19,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:19,629 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-25 19:59:19,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 39 [2021-11-25 19:59:19,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:19,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:19,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:19,688 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-25 19:59:19,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 56 [2021-11-25 19:59:19,712 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 19 treesize of output 1 [2021-11-25 19:59:19,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:19,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:19,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:19,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:19,794 INFO L354 Elim1Store]: treesize reduction 31, result has 29.5 percent of original size [2021-11-25 19:59:19,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 56 [2021-11-25 19:59:21,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-25 19:59:21,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:59:23,783 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 194 [2021-11-25 19:59:23,977 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 194 [2021-11-25 19:59:24,126 INFO L197 IcfgInterpreter]: Interpreting procedure aws_raise_error with input of size 86 for LOIs [2021-11-25 19:59:24,166 INFO L197 IcfgInterpreter]: Interpreting procedure aws_byte_buf_is_valid with input of size 147 for LOIs [2021-11-25 19:59:25,016 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_bool with input of size 129 for LOIs [2021-11-25 19:59:25,038 INFO L197 IcfgInterpreter]: Interpreting procedure assert_bytes_match with input of size 115 for LOIs [2021-11-25 19:59:25,144 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 115 for LOIs [2021-11-25 19:59:25,294 INFO L197 IcfgInterpreter]: Interpreting procedure aws_byte_cursor_is_valid with input of size 144 for LOIs [2021-11-25 19:59:25,816 INFO L197 IcfgInterpreter]: Interpreting procedure bounded_malloc with input of size 94 for LOIs [2021-11-25 19:59:26,099 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 103 for LOIs [2021-11-25 19:59:26,240 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:00:24,992 WARN L227 SmtUtils]: Spent 52.29s on a formula simplification. DAG size of input: 147 DAG size of output: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:00:41,533 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3121#(and (<= ~s_common_log_subject_list~0.subject_list.offset 0) (<= 195 |~#s_can_fail_allocator_static~0.base|) (<= |~#errors~0.base| 197) (<= 0 |~#s_tolower_table~0.offset|) (<= 0 |#NULL.base|) (<= 2 ~s_common_log_subject_list~0.count) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= |~#s_tolower_table~0.base| 196) (<= ~s_list~0.error_list.base 197) (= (mod __VERIFIER_assert_~cond 256) 0) (<= |~#errors~0.offset| 0) (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.offset_BEFORE_CALL_11| Int)) (and (<= 0 |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.offset_BEFORE_CALL_11|) (<= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.offset_BEFORE_CALL_11| 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_11|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.offset_BEFORE_CALL_11| 24)) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_11|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.offset_BEFORE_CALL_11| 24)) 0) (<= 0 |v_ULTIMATE.start_aws_byte_buf_append_dynamic_~to#1.base_BEFORE_CALL_11|))) (<= 0 |~#errors~0.offset|) (<= 196 |~#s_tolower_table~0.base|) (exists ((|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_32| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_44| Int) (|v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset_BEFORE_CALL_44| Int)) (and (<= 0 |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_32|) (<= 0 |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_44|) (= |__VERIFIER_assert_#in~cond| (ite (= (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_44|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset_BEFORE_CALL_44| 8)) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.base_BEFORE_CALL_44|) (+ |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset_BEFORE_CALL_44| 8)) 0)) 1 0) (ite (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_32|) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to_old~0#1.base_BEFORE_CALL_32|) 8) 0)) 1 0)) 1 0) 0) 0 1)) (<= 0 |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset_BEFORE_CALL_44|) (<= |v_ULTIMATE.start_aws_byte_buf_append_dynamic_harness_~#to~0#1.offset_BEFORE_CALL_44| 0))) (<= |~#s_common_log_subject_infos~0.offset| 0) (<= 46 ~s_list~0.count) (<= |#NULL.offset| 0) (<= |~#s_tolower_table~0.offset| 0) (<= ~s_common_log_subject_list~0.count 2) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~s_list~0.error_list.offset 0) (<= 0 |~#s_common_log_subject_infos~0.offset|) (<= 0 ~s_common_log_subject_list~0.subject_list.offset) (<= |~#s_common_log_subject_infos~0.base| 198) (<= 0 ~s_list~0.error_list.offset) (<= 197 ~s_list~0.error_list.base) (<= 0 ~s_common_library_initialized~0) (<= ~s_common_library_initialized~0 0) (<= |#NULL.base| 0) (= ~aws_common_error~0~AWS_ERROR_INVALID_ARGUMENT ~tl_last_error~0) (<= 197 |~#errors~0.base|) (<= 198 |~#s_common_log_subject_infos~0.base|) (<= 198 ~s_common_log_subject_list~0.subject_list.base) (<= 0 |#NULL.offset|) (<= |~#s_can_fail_allocator_static~0.base| 195) (<= 0 |#StackHeapBarrier|) (<= ~s_common_log_subject_list~0.subject_list.base 198) (<= ~s_list~0.count 46) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2021-11-25 20:00:41,534 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:00:41,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:00:41,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 30 [2021-11-25 20:00:41,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44111848] [2021-11-25 20:00:41,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:00:41,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-25 20:00:41,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:00:41,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-25 20:00:41,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=5706, Unknown=8, NotChecked=152, Total=6162 [2021-11-25 20:00:41,544 INFO L87 Difference]: Start difference. First operand 216 states and 298 transitions. Second operand has 30 states, 21 states have (on average 2.619047619047619) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (25), 13 states have call predecessors, (25), 12 states have call successors, (25) [2021-11-25 20:00:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:00:46,805 INFO L93 Difference]: Finished difference Result 276 states and 365 transitions. [2021-11-25 20:00:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 20:00:46,805 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 21 states have (on average 2.619047619047619) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (25), 13 states have call predecessors, (25), 12 states have call successors, (25) Word has length 61 [2021-11-25 20:00:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:00:46,809 INFO L225 Difference]: With dead ends: 276 [2021-11-25 20:00:46,809 INFO L226 Difference]: Without dead ends: 274 [2021-11-25 20:00:46,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 84 SyntacticMatches, 21 SemanticMatches, 96 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3033 ImplicationChecksByTransitivity, 113.9s TimeCoverageRelationStatistics Valid=442, Invalid=8865, Unknown=9, NotChecked=190, Total=9506 [2021-11-25 20:00:46,814 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 102 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 2543 SdHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:00:46,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 2543 Invalid, 1668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1249 Invalid, 0 Unknown, 293 Unchecked, 1.4s Time] [2021-11-25 20:00:46,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-25 20:00:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 252. [2021-11-25 20:00:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 136 states have internal predecessors, (154), 89 states have call successors, (89), 28 states have call predecessors, (89), 28 states have return successors, (88), 87 states have call predecessors, (88), 88 states have call successors, (88) [2021-11-25 20:00:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 331 transitions. [2021-11-25 20:00:46,843 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 331 transitions. Word has length 61 [2021-11-25 20:00:46,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:00:46,844 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 331 transitions. [2021-11-25 20:00:46,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 21 states have (on average 2.619047619047619) internal successors, (55), 25 states have internal predecessors, (55), 15 states have call successors, (28), 7 states have call predecessors, (28), 8 states have return successors, (25), 13 states have call predecessors, (25), 12 states have call successors, (25) [2021-11-25 20:00:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 331 transitions. [2021-11-25 20:00:46,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-25 20:00:46,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:00:46,848 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:00:46,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:00:47,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:47,049 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:00:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:00:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 249299340, now seen corresponding path program 1 times [2021-11-25 20:00:47,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:00:47,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554212335] [2021-11-25 20:00:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:47,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:00:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 20:00:48,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:00:48,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554212335] [2021-11-25 20:00:48,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554212335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:00:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670825253] [2021-11-25 20:00:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:00:48,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:00:48,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:00:48,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:00:48,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9984880d-9c50-46d2-8cff-8dba6eacf85c/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:00:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:00:49,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-25 20:00:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:00:49,753 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 13 treesize of output 9 [2021-11-25 20:00:49,759 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 13 treesize of output 9 [2021-11-25 20:00:49,766 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 6 treesize of output 5 [2021-11-25 20:00:52,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-25 20:00:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:00:53,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:00:54,622 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 14202 disjunctions. This might take some time... [2021-11-25 20:01:08,547 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 13413 disjunctions.