./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_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_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/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_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/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_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/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 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:25:15,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:25:15,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:25:15,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:25:15,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:25:15,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:25:15,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:25:15,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:25:15,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:25:15,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:25:15,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:25:15,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:25:15,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:25:15,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:25:15,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:25:15,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:25:15,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:25:15,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:25:15,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:25:15,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:25:15,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:25:15,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:25:15,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:25:15,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:25:15,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:25:15,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:25:15,271 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:25:15,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:25:15,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:25:15,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:25:15,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:25:15,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:25:15,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:25:15,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:25:15,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:25:15,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:25:15,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:25:15,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:25:15,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:25:15,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:25:15,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:25:15,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:25:15,340 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:25:15,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:25:15,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:25:15,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:25:15,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:25:15,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:25:15,351 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:25:15,351 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:25:15,352 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:25:15,352 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:25:15,353 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:25:15,353 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:25:15,354 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:25:15,354 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:25:15,354 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:25:15,354 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:25:15,355 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:25:15,355 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:25:15,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:25:15,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:25:15,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:25:15,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:25:15,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:25:15,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:25:15,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:25:15,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:25:15,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:25:15,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:25:15,360 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:25:15,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:25:15,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:25:15,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:25:15,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:25:15,362 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:25:15,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:25:15,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:25:15,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:25:15,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:25:15,363 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_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 69a4e17497471d2fff231bad199d28dc26e616d1fdaf7fc57a8b45b8dfdd40ce [2021-11-25 18:25:15,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:25:15,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:25:15,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:25:15,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:25:15,739 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:25:15,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2021-11-25 18:25:15,838 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/data/3f96e9c3a/99ee3b31228d41de973ffb9312be009c/FLAG3137ff4e2 [2021-11-25 18:25:17,102 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:25:17,102 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i [2021-11-25 18:25:17,166 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/data/3f96e9c3a/99ee3b31228d41de973ffb9312be009c/FLAG3137ff4e2 [2021-11-25 18:25:17,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/data/3f96e9c3a/99ee3b31228d41de973ffb9312be009c [2021-11-25 18:25:17,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:25:17,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:25:17,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:25:17,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:25:17,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:25:17,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:25:17" (1/1) ... [2021-11-25 18:25:17,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4feca4e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:17, skipping insertion in model container [2021-11-25 18:25:17,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:25:17" (1/1) ... [2021-11-25 18:25:17,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:25:17,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:25:17,976 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_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2021-11-25 18:25:17,987 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_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2021-11-25 18:25:19,847 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:19,848 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:19,849 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:19,850 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:19,851 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:19,865 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:19,866 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:19,868 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:19,869 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:20,549 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:25:20,551 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:25:20,552 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:25:20,554 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:25:20,555 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:25:20,556 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:25:20,557 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:25:20,558 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:25:20,559 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:25:20,559 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:25:20,776 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:25:20,881 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:20,881 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,104 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:25:21,184 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:25:21,200 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_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4496,4509] [2021-11-25 18:25:21,201 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_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/sv-benchmarks/c/aws-c-common/aws_string_eq_byte_buf_harness.i[4556,4569] [2021-11-25 18:25:21,241 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,242 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,243 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,243 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,244 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,251 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,252 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,253 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,254 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,291 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-25 18:25:21,292 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-25 18:25:21,293 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-25 18:25:21,294 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-25 18:25:21,295 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-25 18:25:21,296 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-25 18:25:21,297 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-25 18:25:21,297 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-25 18:25:21,298 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-25 18:25:21,298 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-25 18:25:21,320 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-25 18:25:21,442 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,443 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-25 18:25:21,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:25:21,980 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:25:21,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21 WrapperNode [2021-11-25 18:25:21,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:25:21,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:25:21,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:25:21,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:25:21,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,329 INFO L137 Inliner]: procedures = 693, calls = 2792, calls flagged for inlining = 61, calls inlined = 8, statements flattened = 879 [2021-11-25 18:25:22,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:25:22,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:25:22,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:25:22,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:25:22,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,477 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:25:22,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:25:22,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:25:22,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:25:22,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (1/1) ... [2021-11-25 18:25:22,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:25:22,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:25:22,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:25:22,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:25:22,616 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2021-11-25 18:25:22,616 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2021-11-25 18:25:22,617 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-25 18:25:22,618 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-25 18:25:22,618 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2021-11-25 18:25:22,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2021-11-25 18:25:22,619 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 18:25:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:25:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-25 18:25:22,620 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-25 18:25:22,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:25:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:25:22,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:25:22,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:25:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:25:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:25:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:25:22,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:25:22,622 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-25 18:25:22,623 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-25 18:25:22,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:25:22,624 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:25:22,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:25:22,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:25:22,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:25:22,625 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-11-25 18:25:22,625 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-11-25 18:25:22,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:25:22,626 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-25 18:25:22,626 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-25 18:25:22,626 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-25 18:25:22,626 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-25 18:25:22,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:25:22,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:25:22,996 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:25:22,998 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:25:24,681 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:25:24,877 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:25:24,877 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:25:24,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:25:24 BoogieIcfgContainer [2021-11-25 18:25:24,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:25:24,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:25:24,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:25:24,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:25:24,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:25:17" (1/3) ... [2021-11-25 18:25:24,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40caf4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:25:24, skipping insertion in model container [2021-11-25 18:25:24,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:25:21" (2/3) ... [2021-11-25 18:25:24,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40caf4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:25:24, skipping insertion in model container [2021-11-25 18:25:24,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:25:24" (3/3) ... [2021-11-25 18:25:24,891 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_string_eq_byte_buf_harness.i [2021-11-25 18:25:24,897 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:25:24,898 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:25:24,958 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:25:24,966 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 18:25:24,967 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:25:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-25 18:25:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 18:25:25,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:25:25,002 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:25:25,003 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:25:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:25:25,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1565822056, now seen corresponding path program 1 times [2021-11-25 18:25:25,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:25:25,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796069616] [2021-11-25 18:25:25,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:25,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:25:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:25,893 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 18:25:25,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:25:25,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796069616] [2021-11-25 18:25:25,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796069616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:25:25,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:25:25,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:25:25,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338172779] [2021-11-25 18:25:25,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:25:25,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:25:25,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:25:25,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:25:25,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:25:25,943 INFO L87 Difference]: Start difference. First operand has 94 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 52 states have internal predecessors, (62), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 18:25:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:25:26,172 INFO L93 Difference]: Finished difference Result 161 states and 221 transitions. [2021-11-25 18:25:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:25:26,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 51 [2021-11-25 18:25:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:25:26,188 INFO L225 Difference]: With dead ends: 161 [2021-11-25 18:25:26,188 INFO L226 Difference]: Without dead ends: 125 [2021-11-25 18:25:26,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:25:26,197 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 12 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:25:26,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 348 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:25:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-25 18:25:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-11-25 18:25:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 70 states have internal predecessors, (84), 43 states have call successors, (43), 10 states have call predecessors, (43), 10 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-25 18:25:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 169 transitions. [2021-11-25 18:25:26,270 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 169 transitions. Word has length 51 [2021-11-25 18:25:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:25:26,271 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 169 transitions. [2021-11-25 18:25:26,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-25 18:25:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 169 transitions. [2021-11-25 18:25:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-25 18:25:26,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:25:26,277 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:25:26,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:25:26,278 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:25:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:25:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1246662955, now seen corresponding path program 1 times [2021-11-25 18:25:26,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:25:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887973960] [2021-11-25 18:25:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:26,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:25:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 18:25:29,407 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:25:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887973960] [2021-11-25 18:25:29,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887973960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:25:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271171160] [2021-11-25 18:25:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:25:29,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:25:29,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:25:29,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:25:29,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9ad5c70-fb5a-486b-a950-b423ffd0cb69/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:25:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:25:30,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2548 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-25 18:25:30,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:25:30,708 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 18:25:30,716 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 18:25:42,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:25:42,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 62 [2021-11-25 18:25:42,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 18:25:42,949 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 17 treesize of output 17 [2021-11-25 18:25:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 18:25:45,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:25:48,605 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 76449 disjunctions. This might take some time... [2021-11-25 18:34:18,078 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 76449 disjunctions.