./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P --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 7608d8aa64807891206ad38b93db31434f261f46ffbbb3a8b8a4940e4ab5ce81 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:36:21,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:36:21,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:36:21,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:36:21,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:36:21,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:36:21,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:36:21,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:36:21,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:36:21,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:36:21,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:36:21,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:36:21,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:36:21,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:36:21,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:36:21,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:36:21,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:36:21,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:36:21,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:36:21,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:36:21,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:36:21,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:36:21,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:36:21,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:36:21,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:36:21,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:36:21,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:36:21,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:36:21,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:36:21,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:36:21,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:36:21,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:36:21,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:36:21,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:36:21,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:36:21,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:36:21,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:36:21,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:36:21,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:36:21,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:36:21,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:36:21,350 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:36:21,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:36:21,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:36:21,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:36:21,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:36:21,405 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:36:21,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:36:21,406 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:36:21,406 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:36:21,407 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:36:21,407 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:36:21,408 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:36:21,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:36:21,409 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:36:21,409 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:36:21,409 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:36:21,409 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:36:21,410 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:36:21,410 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:36:21,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:36:21,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:36:21,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:36:21,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:36:21,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:36:21,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:36:21,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:36:21,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:36:21,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:36:21,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:36:21,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:36:21,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:21,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:36:21,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:36:21,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:36:21,416 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:36:21,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:36:21,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:36:21,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:36:21,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:36:21,417 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_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7608d8aa64807891206ad38b93db31434f261f46ffbbb3a8b8a4940e4ab5ce81 [2021-11-20 23:36:21,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:36:21,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:36:21,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:36:21,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:36:21,718 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:36:21,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i [2021-11-20 23:36:21,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/data/67906a8c2/4b3205bb4b4e4364ac3f730c4db674fa/FLAG1919d81ff [2021-11-20 23:36:22,625 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:36:22,626 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i [2021-11-20 23:36:22,674 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/data/67906a8c2/4b3205bb4b4e4364ac3f730c4db674fa/FLAG1919d81ff [2021-11-20 23:36:23,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/data/67906a8c2/4b3205bb4b4e4364ac3f730c4db674fa [2021-11-20 23:36:23,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:36:23,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:36:23,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:23,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:36:23,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:36:23,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:23" (1/1) ... [2021-11-20 23:36:23,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@499a69b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:23, skipping insertion in model container [2021-11-20 23:36:23,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:36:23" (1/1) ... [2021-11-20 23:36:23,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:36:23,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:36:23,620 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_15c0f73c-9a97-413a-a30e-7ec5811b78b2/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4494,4507] [2021-11-20 23:36:23,630 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_15c0f73c-9a97-413a-a30e-7ec5811b78b2/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4554,4567] [2021-11-20 23:36:24,896 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,897 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,899 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,900 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,901 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,928 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,931 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,934 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,936 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,940 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,944 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,945 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:24,945 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:25,505 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:36:25,507 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:36:25,508 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:36:25,509 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:36:25,510 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:36:25,511 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:36:25,512 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:36:25,512 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:36:25,513 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:36:25,514 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:36:25,756 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:36:26,175 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,177 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,217 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,219 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,227 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,246 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,247 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,249 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,250 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,250 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,251 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,251 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:26,350 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:36:26,372 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_15c0f73c-9a97-413a-a30e-7ec5811b78b2/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4494,4507] [2021-11-20 23:36:26,373 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_15c0f73c-9a97-413a-a30e-7ec5811b78b2/sv-benchmarks/c/aws-c-common/aws_hash_iter_delete_harness.i[4554,4567] [2021-11-20 23:36:26,407 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,408 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,408 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,409 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,409 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,415 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,416 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,416 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,417 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,418 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,418 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,419 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,419 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,449 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-20 23:36:26,449 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-20 23:36:26,450 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-20 23:36:26,451 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-20 23:36:26,452 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-20 23:36:26,452 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-20 23:36:26,453 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-20 23:36:26,453 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-20 23:36:26,454 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-20 23:36:26,454 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-20 23:36:26,473 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-20 23:36:26,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,688 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,696 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,700 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,700 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,708 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,709 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,710 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,710 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,711 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,711 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,711 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-20 23:36:26,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:36:27,100 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:36:27,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27 WrapperNode [2021-11-20 23:36:27,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:36:27,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:27,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:36:27,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:36:27,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,371 INFO L137 Inliner]: procedures = 774, calls = 2460, calls flagged for inlining = 66, calls inlined = 11, statements flattened = 732 [2021-11-20 23:36:27,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:36:27,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:36:27,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:36:27,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:36:27,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:36:27,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:36:27,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:36:27,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:36:27,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (1/1) ... [2021-11-20 23:36:27,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:36:27,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:27,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:36:27,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:36:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-20 23:36:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-20 23:36:27,614 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-20 23:36:27,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:36:27,614 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-20 23:36:27,614 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-20 23:36:27,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 23:36:27,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 23:36:27,615 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2021-11-20 23:36:27,615 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2021-11-20 23:36:27,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:36:27,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:36:27,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:36:27,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:36:27,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:36:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-20 23:36:27,617 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-20 23:36:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2021-11-20 23:36:27,617 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2021-11-20 23:36:27,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 23:36:27,618 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 23:36:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:36:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2021-11-20 23:36:27,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2021-11-20 23:36:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:36:27,618 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-20 23:36:27,619 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-20 23:36:27,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:36:27,619 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2021-11-20 23:36:27,620 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2021-11-20 23:36:27,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:36:27,620 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2021-11-20 23:36:27,620 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2021-11-20 23:36:27,620 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:36:27,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-20 23:36:27,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:36:27,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:36:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2021-11-20 23:36:27,625 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2021-11-20 23:36:27,625 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2021-11-20 23:36:27,625 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2021-11-20 23:36:27,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:36:27,626 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2021-11-20 23:36:27,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2021-11-20 23:36:27,626 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2021-11-20 23:36:27,632 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2021-11-20 23:36:27,632 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2021-11-20 23:36:27,632 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2021-11-20 23:36:27,632 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_delete [2021-11-20 23:36:27,633 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_delete [2021-11-20 23:36:27,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:36:28,064 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:36:28,066 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:36:28,335 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !true; [2021-11-20 23:36:28,335 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2021-11-20 23:36:29,174 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:36:29,467 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:36:29,467 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-20 23:36:29,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:29 BoogieIcfgContainer [2021-11-20 23:36:29,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:36:29,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:36:29,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:36:29,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:36:29,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:36:23" (1/3) ... [2021-11-20 23:36:29,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35faa94e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:29, skipping insertion in model container [2021-11-20 23:36:29,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:36:27" (2/3) ... [2021-11-20 23:36:29,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35faa94e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:36:29, skipping insertion in model container [2021-11-20 23:36:29,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:36:29" (3/3) ... [2021-11-20 23:36:29,482 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_hash_iter_delete_harness.i [2021-11-20 23:36:29,490 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:36:29,491 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:36:29,563 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:36:29,585 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 [2021-11-20 23:36:29,585 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:36:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-11-20 23:36:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-20 23:36:29,639 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:29,640 INFO L514 BasicCegarLoop]: trace histogram [19, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:29,641 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:29,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:29,652 INFO L85 PathProgramCache]: Analyzing trace with hash -662002685, now seen corresponding path program 1 times [2021-11-20 23:36:29,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:29,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872351949] [2021-11-20 23:36:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:29,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:30,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:36:30,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42941178] [2021-11-20 23:36:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:30,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:30,123 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:30,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:36:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:30,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:36:30,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-20 23:36:31,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:36:31,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:31,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872351949] [2021-11-20 23:36:31,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:36:31,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42941178] [2021-11-20 23:36:31,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42941178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:31,067 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:36:31,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:36:31,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24658364] [2021-11-20 23:36:31,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:31,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:31,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:36:31,105 INFO L87 Difference]: Start difference. First operand has 167 states, 94 states have (on average 1.202127659574468) internal successors, (113), 93 states have internal predecessors, (113), 54 states have call successors, (54), 19 states have call predecessors, (54), 19 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) Second operand has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 23:36:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:31,941 INFO L93 Difference]: Finished difference Result 304 states and 413 transitions. [2021-11-20 23:36:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:36:31,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 146 [2021-11-20 23:36:31,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:31,955 INFO L225 Difference]: With dead ends: 304 [2021-11-20 23:36:31,955 INFO L226 Difference]: Without dead ends: 169 [2021-11-20 23:36:31,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:31,963 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 1 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:31,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 744 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 23:36:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-20 23:36:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2021-11-20 23:36:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 95 states have internal predecessors, (109), 54 states have call successors, (54), 19 states have call predecessors, (54), 20 states have return successors, (54), 54 states have call predecessors, (54), 53 states have call successors, (54) [2021-11-20 23:36:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 217 transitions. [2021-11-20 23:36:32,023 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 217 transitions. Word has length 146 [2021-11-20 23:36:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:32,025 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 217 transitions. [2021-11-20 23:36:32,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.0) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-20 23:36:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 217 transitions. [2021-11-20 23:36:32,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-20 23:36:32,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:32,031 INFO L514 BasicCegarLoop]: trace histogram [19, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:32,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:32,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 23:36:32,232 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:32,233 INFO L85 PathProgramCache]: Analyzing trace with hash -130836943, now seen corresponding path program 1 times [2021-11-20 23:36:32,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:32,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204971519] [2021-11-20 23:36:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:32,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2021-11-20 23:36:32,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204971519] [2021-11-20 23:36:32,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204971519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:32,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031559307] [2021-11-20 23:36:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:32,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:32,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:32,811 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:32,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:36:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:33,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 2419 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 23:36:33,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-11-20 23:36:33,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:36:33,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031559307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:33,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:36:33,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2021-11-20 23:36:33,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716859307] [2021-11-20 23:36:33,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:33,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:36:33,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:33,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:36:33,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:36:33,762 INFO L87 Difference]: Start difference. First operand 169 states and 217 transitions. Second operand has 6 states, 3 states have (on average 19.666666666666668) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-20 23:36:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:35,545 INFO L93 Difference]: Finished difference Result 290 states and 376 transitions. [2021-11-20 23:36:35,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:36:35,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 19.666666666666668) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 150 [2021-11-20 23:36:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:35,550 INFO L225 Difference]: With dead ends: 290 [2021-11-20 23:36:35,551 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 23:36:35,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:36:35,553 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 0 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:35,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 823 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 23:36:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 23:36:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-20 23:36:35,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 97 states have internal predecessors, (110), 54 states have call successors, (54), 19 states have call predecessors, (54), 21 states have return successors, (55), 54 states have call predecessors, (55), 53 states have call successors, (55) [2021-11-20 23:36:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2021-11-20 23:36:35,595 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 150 [2021-11-20 23:36:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:35,598 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2021-11-20 23:36:35,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 19.666666666666668) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (36), 2 states have call predecessors, (36), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-20 23:36:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2021-11-20 23:36:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-20 23:36:35,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:35,602 INFO L514 BasicCegarLoop]: trace histogram [19, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:35,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:35,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:35,803 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:35,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1254387229, now seen corresponding path program 1 times [2021-11-20 23:36:35,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:35,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217393714] [2021-11-20 23:36:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:35,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-11-20 23:36:36,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:36,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217393714] [2021-11-20 23:36:36,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217393714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:36,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310119387] [2021-11-20 23:36:36,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:36,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:36,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:36,106 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:36,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:36:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:36,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 2443 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 23:36:36,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:37,036 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 16 treesize of output 12 [2021-11-20 23:36:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-11-20 23:36:37,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:36:37,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310119387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:37,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:36:37,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2021-11-20 23:36:37,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993954368] [2021-11-20 23:36:37,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:37,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:36:37,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:37,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:36:37,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-11-20 23:36:37,710 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-20 23:36:38,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:38,531 INFO L93 Difference]: Finished difference Result 303 states and 391 transitions. [2021-11-20 23:36:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:36:38,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) Word has length 156 [2021-11-20 23:36:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:38,534 INFO L225 Difference]: With dead ends: 303 [2021-11-20 23:36:38,535 INFO L226 Difference]: Without dead ends: 176 [2021-11-20 23:36:38,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-20 23:36:38,538 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 16 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:38,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 714 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 58 Unchecked, 0.8s Time] [2021-11-20 23:36:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-20 23:36:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-11-20 23:36:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 99 states have (on average 1.1515151515151516) internal successors, (114), 100 states have internal predecessors, (114), 55 states have call successors, (55), 21 states have call predecessors, (55), 21 states have return successors, (56), 54 states have call predecessors, (56), 54 states have call successors, (56) [2021-11-20 23:36:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2021-11-20 23:36:38,561 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 156 [2021-11-20 23:36:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:38,562 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2021-11-20 23:36:38,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.888888888888889) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (34), 5 states have call predecessors, (34), 5 states have call successors, (34) [2021-11-20 23:36:38,562 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2021-11-20 23:36:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-20 23:36:38,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:38,566 INFO L514 BasicCegarLoop]: trace histogram [19, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:38,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:38,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:38,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1781492094, now seen corresponding path program 1 times [2021-11-20 23:36:38,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:38,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936248311] [2021-11-20 23:36:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:38,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2021-11-20 23:36:39,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:39,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936248311] [2021-11-20 23:36:39,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936248311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:39,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294360676] [2021-11-20 23:36:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:39,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:39,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:39,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:39,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:36:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:39,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 2472 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 23:36:39,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-11-20 23:36:39,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:36:39,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294360676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:36:39,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:36:39,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-11-20 23:36:39,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517173014] [2021-11-20 23:36:39,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:36:40,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:36:40,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:36:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:36:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:40,003 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 5 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-20 23:36:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:36:41,494 INFO L93 Difference]: Finished difference Result 280 states and 361 transitions. [2021-11-20 23:36:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:36:41,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) Word has length 160 [2021-11-20 23:36:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:36:41,497 INFO L225 Difference]: With dead ends: 280 [2021-11-20 23:36:41,498 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 23:36:41,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:36:41,500 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 0 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:36:41,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 654 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 23:36:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 23:36:41,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-20 23:36:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 100 states have (on average 1.15) internal successors, (115), 102 states have internal predecessors, (115), 55 states have call successors, (55), 21 states have call predecessors, (55), 22 states have return successors, (59), 54 states have call predecessors, (59), 54 states have call successors, (59) [2021-11-20 23:36:41,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 229 transitions. [2021-11-20 23:36:41,522 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 229 transitions. Word has length 160 [2021-11-20 23:36:41,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:36:41,523 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 229 transitions. [2021-11-20 23:36:41,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 22.0) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 2 states have call predecessors, (38), 4 states have return successors, (35), 3 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-20 23:36:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 229 transitions. [2021-11-20 23:36:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 23:36:41,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:36:41,527 INFO L514 BasicCegarLoop]: trace histogram [19, 3, 3, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:36:41,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:36:41,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:41,741 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:36:41,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:36:41,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1721756513, now seen corresponding path program 1 times [2021-11-20 23:36:41,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:36:41,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719876481] [2021-11-20 23:36:41,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:41,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:36:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-20 23:36:42,028 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:36:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719876481] [2021-11-20 23:36:42,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719876481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:36:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375129452] [2021-11-20 23:36:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:36:42,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:36:42,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:36:42,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:36:42,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15c0f73c-9a97-413a-a30e-7ec5811b78b2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:36:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:36:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:36:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:36:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 188 proven. 24 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-20 23:36:42,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:36:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-11-20 23:36:43,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375129452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:36:43,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1871151569] [2021-11-20 23:36:43,579 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2021-11-20 23:36:43,580 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:36:43,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:36:43,590 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:36:43,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:36:48,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:48,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:36:49,029 INFO L244 Elim1Store]: Index analysis took 421 ms [2021-11-20 23:37:20,842 WARN L227 SmtUtils]: Spent 31.68s on a formula simplification. DAG size of input: 2161 DAG size of output: 1179 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:37:20,849 INFO L354 Elim1Store]: treesize reduction 3528, result has 33.3 percent of original size [2021-11-20 23:37:20,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 199 select indices, 199 select index equivalence classes, 19505 disjoint index pairs (out of 19701 index pairs), introduced 199 new quantified variables, introduced 392 case distinctions, treesize of input 1002 treesize of output 2377 [2021-11-20 23:37:44,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:37:44,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 197 select indices, 197 select index equivalence classes, 19503 disjoint index pairs (out of 19306 index pairs), introduced 197 new quantified variables, introduced 0 case distinctions, treesize of input 992 treesize of output 1582