./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_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_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/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_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/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_f80518d4-3d12-4d14-a967-8da31e8c62e1/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 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:49:30,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:49:30,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:49:30,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:49:30,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:49:30,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:49:30,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:49:30,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:49:30,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:49:30,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:49:30,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:49:30,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:49:30,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:49:30,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:49:30,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:49:30,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:49:30,326 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:49:30,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:49:30,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:49:30,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:49:30,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:49:30,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:49:30,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:49:30,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:49:30,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:49:30,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:49:30,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:49:30,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:49:30,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:49:30,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:49:30,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:49:30,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:49:30,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:49:30,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:49:30,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:49:30,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:49:30,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:49:30,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:49:30,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:49:30,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:49:30,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:49:30,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:49:30,401 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:49:30,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:49:30,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:49:30,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:49:30,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:49:30,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:49:30,403 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:49:30,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:49:30,404 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:49:30,404 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:49:30,404 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:49:30,404 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:49:30,405 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:49:30,405 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:49:30,405 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:49:30,405 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:49:30,406 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:49:30,406 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:49:30,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:49:30,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:49:30,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:49:30,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:49:30,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:49:30,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:49:30,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:49:30,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:49:30,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:49:30,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:49:30,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:49:30,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:49:30,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:49:30,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:49:30,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:49:30,410 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:49:30,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:49:30,411 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:49:30,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:49:30,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:49:30,411 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_f80518d4-3d12-4d14-a967-8da31e8c62e1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39617118f1cddf1edf0da2bed0d1b7ba56db146c1be6da9375c591252f5b5d55 [2021-11-21 00:49:30,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:49:30,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:49:30,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:49:30,758 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:49:30,759 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:49:30,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-11-21 00:49:30,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/data/6144cb20d/ad466c42f3984d16901de50e0c8c5772/FLAG06f1ca40a [2021-11-21 00:49:31,716 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:49:31,717 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i [2021-11-21 00:49:31,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/data/6144cb20d/ad466c42f3984d16901de50e0c8c5772/FLAG06f1ca40a [2021-11-21 00:49:32,188 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/data/6144cb20d/ad466c42f3984d16901de50e0c8c5772 [2021-11-21 00:49:32,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:49:32,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:49:32,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:32,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:49:32,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:49:32,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:32" (1/1) ... [2021-11-21 00:49:32,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454a8598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:32, skipping insertion in model container [2021-11-21 00:49:32,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:32" (1/1) ... [2021-11-21 00:49:32,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:49:32,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:49:32,690 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_f80518d4-3d12-4d14-a967-8da31e8c62e1/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-11-21 00:49:32,700 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_f80518d4-3d12-4d14-a967-8da31e8c62e1/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-11-21 00:49:33,672 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,673 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,674 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,675 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,676 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,694 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,695 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,697 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,698 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,701 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,702 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,703 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:33,704 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,102 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:49:34,103 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:49:34,105 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:49:34,106 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:49:34,108 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:49:34,109 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:49:34,110 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:49:34,110 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:49:34,111 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:49:34,112 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:49:34,300 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:49:34,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:34,402 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:49:34,444 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_f80518d4-3d12-4d14-a967-8da31e8c62e1/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4500,4513] [2021-11-21 00:49:34,451 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_f80518d4-3d12-4d14-a967-8da31e8c62e1/sv-benchmarks/c/aws-c-common/aws_linked_list_node_reset_harness.i[4560,4573] [2021-11-21 00:49:34,507 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,508 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,508 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,509 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,510 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,522 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,523 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,524 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,525 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,527 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,528 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,529 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,529 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 00:49:34,582 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 00:49:34,583 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 00:49:34,585 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 00:49:34,586 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 00:49:34,587 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 00:49:34,588 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 00:49:34,589 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 00:49:34,590 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 00:49:34,599 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 00:49:34,600 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 00:49:34,653 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 00:49:34,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:35,098 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:49:35,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35 WrapperNode [2021-11-21 00:49:35,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:35,100 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:35,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:49:35,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:49:35,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,258 INFO L137 Inliner]: procedures = 679, calls = 1032, calls flagged for inlining = 48, calls inlined = 3, statements flattened = 29 [2021-11-21 00:49:35,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:35,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:49:35,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:49:35,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:49:35,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:49:35,325 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:49:35,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:49:35,325 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:49:35,326 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (1/1) ... [2021-11-21 00:49:35,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:49:35,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:35,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:49:35,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:49:35,432 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_reset [2021-11-21 00:49:35,432 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_reset [2021-11-21 00:49:35,433 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2021-11-21 00:49:35,433 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2021-11-21 00:49:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:49:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:49:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 00:49:35,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 00:49:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:49:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:49:35,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:49:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 00:49:35,435 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 00:49:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:49:35,435 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:49:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:49:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:49:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:49:35,744 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:49:35,746 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:49:35,893 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:49:35,916 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:49:35,916 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:49:35,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:35 BoogieIcfgContainer [2021-11-21 00:49:35,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:49:35,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:49:35,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:49:35,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:49:35,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:49:32" (1/3) ... [2021-11-21 00:49:35,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e608e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:35, skipping insertion in model container [2021-11-21 00:49:35,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:35" (2/3) ... [2021-11-21 00:49:35,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e608e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:49:35, skipping insertion in model container [2021-11-21 00:49:35,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:49:35" (3/3) ... [2021-11-21 00:49:35,943 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_node_reset_harness.i [2021-11-21 00:49:35,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:49:35,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:49:36,025 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:49:36,046 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 [2021-11-21 00:49:36,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:49:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-21 00:49:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 00:49:36,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:36,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:36,076 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:36,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:36,083 INFO L85 PathProgramCache]: Analyzing trace with hash 325938203, now seen corresponding path program 1 times [2021-11-21 00:49:36,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:36,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379450187] [2021-11-21 00:49:36,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:36,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:36,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:36,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379450187] [2021-11-21 00:49:36,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379450187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:36,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:36,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:49:36,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112492852] [2021-11-21 00:49:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:36,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:49:36,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:36,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:49:36,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:49:36,453 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:49:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:36,492 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-11-21 00:49:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:49:36,495 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-21 00:49:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:36,504 INFO L225 Difference]: With dead ends: 56 [2021-11-21 00:49:36,505 INFO L226 Difference]: Without dead ends: 29 [2021-11-21 00:49:36,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:49:36,513 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:36,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:49:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-21 00:49:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-21 00:49:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 00:49:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-21 00:49:36,561 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2021-11-21 00:49:36,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:36,561 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-21 00:49:36,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-21 00:49:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-21 00:49:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:49:36,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:36,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:36,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:49:36,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:36,567 INFO L85 PathProgramCache]: Analyzing trace with hash -805366998, now seen corresponding path program 1 times [2021-11-21 00:49:36,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:36,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417084580] [2021-11-21 00:49:36,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:36,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:36,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:36,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417084580] [2021-11-21 00:49:36,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417084580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:36,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:36,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:49:36,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949665938] [2021-11-21 00:49:36,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:36,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:49:36,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:36,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:49:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:49:36,817 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:49:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:36,883 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-21 00:49:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:49:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2021-11-21 00:49:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:36,886 INFO L225 Difference]: With dead ends: 39 [2021-11-21 00:49:36,887 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 00:49:36,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:49:36,889 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:36,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:49:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 00:49:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-11-21 00:49:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 00:49:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-21 00:49:36,902 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 21 [2021-11-21 00:49:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:36,903 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-21 00:49:36,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-21 00:49:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-21 00:49:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:49:36,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:36,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:36,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:49:36,906 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:36,907 INFO L85 PathProgramCache]: Analyzing trace with hash 989415369, now seen corresponding path program 1 times [2021-11-21 00:49:36,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:36,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302646998] [2021-11-21 00:49:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:36,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:37,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:37,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302646998] [2021-11-21 00:49:37,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302646998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:49:37,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:49:37,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:49:37,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646161822] [2021-11-21 00:49:37,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:49:37,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:49:37,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:49:37,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:49:37,239 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:49:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:37,309 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-21 00:49:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:49:37,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-11-21 00:49:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:37,311 INFO L225 Difference]: With dead ends: 64 [2021-11-21 00:49:37,312 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 00:49:37,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:49:37,314 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:37,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:49:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 00:49:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-21 00:49:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 00:49:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-21 00:49:37,326 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 22 [2021-11-21 00:49:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:37,326 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-21 00:49:37,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 00:49:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-21 00:49:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-21 00:49:37,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:37,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:37,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:49:37,329 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash -518460441, now seen corresponding path program 1 times [2021-11-21 00:49:37,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:37,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815599098] [2021-11-21 00:49:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:37,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:37,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815599098] [2021-11-21 00:49:37,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815599098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:49:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604621024] [2021-11-21 00:49:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:37,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:37,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:37,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:37,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:49:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:49:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:37,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:38,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604621024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:38,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417739421] [2021-11-21 00:49:38,197 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 00:49:38,197 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:49:38,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:49:38,210 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:49:38,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:49:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:38,425 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:49:38,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:49:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:38,619 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:49:38,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:49:39,044 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 00:49:40,840 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 11 treesize of output 7 [2021-11-21 00:49:40,848 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 11 treesize of output 7 [2021-11-21 00:49:40,857 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 11 treesize of output 7 [2021-11-21 00:49:40,872 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 [2021-11-21 00:49:40,903 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 14 treesize of output 10 [2021-11-21 00:49:40,944 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 00:49:40,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 88 [2021-11-21 00:49:40,984 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 00:49:40,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 91 [2021-11-21 00:49:41,014 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 00:49:41,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2021-11-21 00:49:41,155 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 14 treesize of output 10 [2021-11-21 00:49:41,164 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 14 treesize of output 10 [2021-11-21 00:49:41,173 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 [2021-11-21 00:49:41,189 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 14 treesize of output 10 [2021-11-21 00:49:42,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:49:42,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:49:42,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:42,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:49:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:49:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:49:43,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:49:43,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:49:43,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:43,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:49:44,161 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2021-11-21 00:49:44,415 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 00:49:44,595 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 00:49:45,201 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 115 for LOIs [2021-11-21 00:49:51,421 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 14 treesize of output 10 [2021-11-21 00:49:51,469 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 14 treesize of output 10 [2021-11-21 00:49:51,483 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 [2021-11-21 00:49:51,510 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 14 treesize of output 10 [2021-11-21 00:49:51,638 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:49:54,367 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:49:54,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:49:54,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-21 00:49:54,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622168194] [2021-11-21 00:49:54,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:49:54,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:49:54,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:49:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:49:54,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-11-21 00:49:54,371 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:49:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:49:54,541 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-11-21 00:49:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:49:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 23 [2021-11-21 00:49:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:49:54,543 INFO L225 Difference]: With dead ends: 68 [2021-11-21 00:49:54,544 INFO L226 Difference]: Without dead ends: 40 [2021-11-21 00:49:54,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-11-21 00:49:54,546 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:49:54,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 150 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:49:54,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-21 00:49:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-21 00:49:54,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 00:49:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-21 00:49:54,556 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 23 [2021-11-21 00:49:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:49:54,556 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-21 00:49:54,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 00:49:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-21 00:49:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-21 00:49:54,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:49:54,558 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:49:54,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:49:54,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:54,767 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:49:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:49:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1747951799, now seen corresponding path program 2 times [2021-11-21 00:49:54,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:49:54,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118841512] [2021-11-21 00:49:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:49:54,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:49:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:49:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:54,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:49:54,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118841512] [2021-11-21 00:49:54,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118841512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:49:54,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3033322] [2021-11-21 00:49:54,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:49:54,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:49:54,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:54,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:49:55,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:49:55,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:49:55,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:49:55,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 00:49:55,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:49:55,255 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 11 treesize of output 7 [2021-11-21 00:49:55,287 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-21 00:49:55,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-11-21 00:49:55,332 INFO L354 Elim1Store]: treesize reduction 64, result has 22.0 percent of original size [2021-11-21 00:49:55,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-21 00:49:55,419 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-21 00:49:55,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-21 00:49:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:56,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:49:56,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-11-21 00:49:56,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-11-21 00:49:56,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 304 [2021-11-21 00:49:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:49:56,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3033322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:49:56,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639194919] [2021-11-21 00:49:56,973 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 00:49:56,973 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:49:56,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:49:56,975 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:49:56,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:49:57,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:57,064 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:49:57,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:49:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:57,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:49:57,207 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:49:57,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:49:57,495 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 00:49:58,979 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 11 treesize of output 7 [2021-11-21 00:49:58,987 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 11 treesize of output 7 [2021-11-21 00:49:58,998 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 [2021-11-21 00:49:59,005 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 11 treesize of output 7 [2021-11-21 00:49:59,042 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 14 treesize of output 10 [2021-11-21 00:49:59,079 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 00:49:59,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 88 [2021-11-21 00:49:59,102 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 00:49:59,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 91 [2021-11-21 00:49:59,124 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 00:49:59,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2021-11-21 00:49:59,231 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 14 treesize of output 10 [2021-11-21 00:49:59,241 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 14 treesize of output 10 [2021-11-21 00:49:59,249 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 [2021-11-21 00:49:59,262 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 14 treesize of output 10 [2021-11-21 00:50:00,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:00,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:00,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:01,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:01,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:01,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:01,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:01,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:01,892 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2021-11-21 00:50:02,088 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 00:50:02,241 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 00:50:02,800 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 115 for LOIs [2021-11-21 00:50:08,370 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 [2021-11-21 00:50:08,387 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 14 treesize of output 10 [2021-11-21 00:50:08,419 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 14 treesize of output 10 [2021-11-21 00:50:08,437 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 14 treesize of output 10 [2021-11-21 00:50:08,535 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:50:11,653 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:50:11,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:50:11,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 11] total 29 [2021-11-21 00:50:11,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764605470] [2021-11-21 00:50:11,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:50:11,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:50:11,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:50:11,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1895, Unknown=0, NotChecked=0, Total=2070 [2021-11-21 00:50:11,657 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 29 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:50:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:12,082 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2021-11-21 00:50:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:50:12,083 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 26 [2021-11-21 00:50:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:12,085 INFO L225 Difference]: With dead ends: 77 [2021-11-21 00:50:12,085 INFO L226 Difference]: Without dead ends: 48 [2021-11-21 00:50:12,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 00:50:12,088 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:12,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 275 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 196 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2021-11-21 00:50:12,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-21 00:50:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-21 00:50:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 00:50:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-11-21 00:50:12,101 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 26 [2021-11-21 00:50:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:12,102 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-11-21 00:50:12,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 27 states have internal predecessors, (43), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:50:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-11-21 00:50:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-21 00:50:12,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:12,104 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:12,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:12,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:12,323 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:12,323 INFO L85 PathProgramCache]: Analyzing trace with hash 953112821, now seen corresponding path program 1 times [2021-11-21 00:50:12,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:12,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487280792] [2021-11-21 00:50:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:12,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:50:12,570 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:12,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487280792] [2021-11-21 00:50:12,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487280792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:12,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47575968] [2021-11-21 00:50:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:12,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:12,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:12,572 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:12,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:50:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:12,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-21 00:50:12,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:12,827 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 11 treesize of output 7 [2021-11-21 00:50:12,888 INFO L354 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2021-11-21 00:50:12,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2021-11-21 00:50:12,946 INFO L354 Elim1Store]: treesize reduction 64, result has 22.0 percent of original size [2021-11-21 00:50:12,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-21 00:50:13,028 INFO L354 Elim1Store]: treesize reduction 120, result has 18.9 percent of original size [2021-11-21 00:50:13,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 47 [2021-11-21 00:50:13,123 INFO L354 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2021-11-21 00:50:13,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 53 [2021-11-21 00:50:15,261 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_24 Int) (v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_26 Int)) (let ((.cse1 (select |c_#memory_int| v_aws_linked_list_node_reset_~node.base_BEFORE_CALL_24))) (let ((.cse0 (select .cse1 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_26))) (and (= .cse0 (select .cse1 (+ 4 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_26))) (= .cse0 (select .cse1 (+ 2 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_26))) (= .cse0 (select .cse1 (+ v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_26 1))) (= .cse0 (select .cse1 (+ 3 v_aws_linked_list_node_reset_~node.offset_BEFORE_CALL_26))))))) is different from true [2021-11-21 00:50:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:25,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:29,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 75 [2021-11-21 00:50:29,597 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 00:50:29,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1405 treesize of output 1399 [2021-11-21 00:50:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:29,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47575968] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:29,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807819826] [2021-11-21 00:50:29,951 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 00:50:29,952 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:50:29,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:50:29,953 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:50:29,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:50:30,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:30,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:30,064 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:50:30,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:50:30,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:30,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:50:30,383 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 00:50:31,528 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 [2021-11-21 00:50:31,533 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 11 treesize of output 7 [2021-11-21 00:50:31,539 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 11 treesize of output 7 [2021-11-21 00:50:31,553 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 11 treesize of output 7 [2021-11-21 00:50:31,568 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 14 treesize of output 10 [2021-11-21 00:50:31,602 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 00:50:31,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 88 [2021-11-21 00:50:31,629 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 00:50:31,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 91 [2021-11-21 00:50:31,654 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 00:50:31,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2021-11-21 00:50:31,756 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 14 treesize of output 10 [2021-11-21 00:50:31,762 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 [2021-11-21 00:50:31,773 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 14 treesize of output 10 [2021-11-21 00:50:31,780 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 14 treesize of output 10 [2021-11-21 00:50:32,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:32,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:33,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:33,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:33,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:33,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:34,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:34,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:35,103 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 00:50:35,168 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 00:50:35,322 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 00:50:36,877 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 115 for LOIs [2021-11-21 00:50:42,934 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 14 treesize of output 10 [2021-11-21 00:50:42,954 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 [2021-11-21 00:50:43,003 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 14 treesize of output 10 [2021-11-21 00:50:43,018 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 14 treesize of output 10 [2021-11-21 00:50:43,158 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:50:46,159 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:50:46,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:50:46,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 33 [2021-11-21 00:50:46,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437340837] [2021-11-21 00:50:46,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:50:46,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 00:50:46,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 00:50:46,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2189, Unknown=2, NotChecked=94, Total=2450 [2021-11-21 00:50:46,163 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:50:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:48,921 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2021-11-21 00:50:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-21 00:50:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 29 [2021-11-21 00:50:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:48,923 INFO L225 Difference]: With dead ends: 95 [2021-11-21 00:50:48,923 INFO L226 Difference]: Without dead ends: 61 [2021-11-21 00:50:48,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=277, Invalid=3147, Unknown=2, NotChecked=114, Total=3540 [2021-11-21 00:50:48,927 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:48,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 314 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 396 Invalid, 0 Unknown, 122 Unchecked, 1.1s Time] [2021-11-21 00:50:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-21 00:50:48,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2021-11-21 00:50:48,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 36 states have internal predecessors, (43), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 00:50:48,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2021-11-21 00:50:48,944 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 29 [2021-11-21 00:50:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:48,944 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2021-11-21 00:50:48,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.53125) internal successors, (49), 32 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:50:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2021-11-21 00:50:48,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-21 00:50:48,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:48,947 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:48,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:50:49,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:49,155 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash 201007013, now seen corresponding path program 2 times [2021-11-21 00:50:49,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:49,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14504490] [2021-11-21 00:50:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:49,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:50:49,445 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14504490] [2021-11-21 00:50:49,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14504490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:50:49,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988969036] [2021-11-21 00:50:49,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:50:49,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:50:49,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:50:49,450 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:50:49,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:50:49,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:50:49,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:50:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-21 00:50:49,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:50:49,877 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 14 treesize of output 10 [2021-11-21 00:50:49,914 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 00:50:49,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-21 00:50:49,970 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-21 00:50:49,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-21 00:50:50,039 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-21 00:50:50,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-21 00:50:50,126 INFO L354 Elim1Store]: treesize reduction 172, result has 16.9 percent of original size [2021-11-21 00:50:50,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2021-11-21 00:50:50,219 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-21 00:50:50,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-21 00:50:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:51,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:50:52,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-11-21 00:50:52,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1576 treesize of output 1572 [2021-11-21 00:50:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:50:52,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988969036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:50:52,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598883156] [2021-11-21 00:50:52,571 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 00:50:52,571 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:50:52,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:50:52,572 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:50:52,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:50:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:52,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:52,694 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:50:52,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:50:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:52,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:50:53,045 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 00:50:54,154 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 [2021-11-21 00:50:54,161 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 11 treesize of output 7 [2021-11-21 00:50:54,167 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 11 treesize of output 7 [2021-11-21 00:50:54,176 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 11 treesize of output 7 [2021-11-21 00:50:54,188 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 14 treesize of output 10 [2021-11-21 00:50:54,213 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 00:50:54,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 88 [2021-11-21 00:50:54,231 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 00:50:54,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 91 [2021-11-21 00:50:54,262 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 00:50:54,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2021-11-21 00:50:54,341 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 14 treesize of output 10 [2021-11-21 00:50:54,352 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 14 treesize of output 10 [2021-11-21 00:50:54,358 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 14 treesize of output 10 [2021-11-21 00:50:54,365 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 [2021-11-21 00:50:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:55,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:56,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:56,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:56,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:57,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:50:57,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:50:57,448 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 00:50:57,508 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 00:50:57,674 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 00:50:59,188 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 115 for LOIs [2021-11-21 00:51:05,628 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 14 treesize of output 10 [2021-11-21 00:51:05,642 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 14 treesize of output 10 [2021-11-21 00:51:05,651 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 14 treesize of output 10 [2021-11-21 00:51:05,695 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 [2021-11-21 00:51:05,773 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:51:09,016 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:51:09,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:51:09,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 15] total 36 [2021-11-21 00:51:09,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383386173] [2021-11-21 00:51:09,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:51:09,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-21 00:51:09,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-21 00:51:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2021-11-21 00:51:09,019 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 36 states, 35 states have (on average 1.6) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:51:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:09,587 INFO L93 Difference]: Finished difference Result 102 states and 127 transitions. [2021-11-21 00:51:09,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:51:09,588 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 32 [2021-11-21 00:51:09,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:09,590 INFO L225 Difference]: With dead ends: 102 [2021-11-21 00:51:09,590 INFO L226 Difference]: Without dead ends: 62 [2021-11-21 00:51:09,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=253, Invalid=2717, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 00:51:09,593 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:09,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 299 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 263 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2021-11-21 00:51:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-21 00:51:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-11-21 00:51:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 43 states have internal predecessors, (54), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 00:51:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2021-11-21 00:51:09,607 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 32 [2021-11-21 00:51:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:09,607 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2021-11-21 00:51:09,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 35 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:51:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2021-11-21 00:51:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 00:51:09,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:09,609 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:09,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:51:09,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:51:09,814 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:09,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1667218479, now seen corresponding path program 3 times [2021-11-21 00:51:09,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:09,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382905925] [2021-11-21 00:51:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:09,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 00:51:10,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:10,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382905925] [2021-11-21 00:51:10,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382905925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:51:10,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131134347] [2021-11-21 00:51:10,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:51:10,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:51:10,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:51:10,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:51:10,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:51:10,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:51:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:51:10,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-21 00:51:10,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:51:10,447 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 14 treesize of output 10 [2021-11-21 00:51:10,478 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 00:51:10,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-21 00:51:10,525 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-21 00:51:10,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-21 00:51:10,596 INFO L354 Elim1Store]: treesize reduction 110, result has 19.1 percent of original size [2021-11-21 00:51:10,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 45 [2021-11-21 00:51:10,696 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-21 00:51:10,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 58 [2021-11-21 00:51:10,826 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-21 00:51:10,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-21 00:51:10,958 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-21 00:51:10,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2021-11-21 00:51:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:51:12,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:51:14,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2021-11-21 00:51:14,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3182 treesize of output 3178 [2021-11-21 00:51:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:51:14,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131134347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:51:14,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [629137991] [2021-11-21 00:51:14,270 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 00:51:14,270 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:51:14,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:51:14,278 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:51:14,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:51:14,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:14,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:14,393 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:51:14,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:51:14,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:14,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 00:51:14,730 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 00:51:15,887 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 14 treesize of output 10 [2021-11-21 00:51:15,892 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 [2021-11-21 00:51:15,898 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 14 treesize of output 10 [2021-11-21 00:51:15,910 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 14 treesize of output 10 [2021-11-21 00:51:15,946 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-21 00:51:15,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 97 [2021-11-21 00:51:15,963 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 00:51:15,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-21 00:51:15,981 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 00:51:15,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-11-21 00:51:16,016 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 14 treesize of output 10 [2021-11-21 00:51:16,042 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 [2021-11-21 00:51:16,048 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 14 treesize of output 10 [2021-11-21 00:51:16,055 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 14 treesize of output 10 [2021-11-21 00:51:16,061 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 14 treesize of output 10 [2021-11-21 00:51:17,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:51:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:17,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:51:18,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:51:18,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:51:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:51:18,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:51:18,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:51:19,310 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 00:51:19,372 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 00:51:19,535 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 00:51:21,104 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 115 for LOIs [2021-11-21 00:51:26,982 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 14 treesize of output 10 [2021-11-21 00:51:26,997 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 14 treesize of output 10 [2021-11-21 00:51:27,016 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 14 treesize of output 10 [2021-11-21 00:51:27,046 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 [2021-11-21 00:51:27,155 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:51:30,379 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:51:30,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:51:30,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 20] total 44 [2021-11-21 00:51:30,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065969433] [2021-11-21 00:51:30,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:51:30,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-21 00:51:30,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:30,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-21 00:51:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=3417, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 00:51:30,382 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 41 states have internal predecessors, (65), 5 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:51:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:31,073 INFO L93 Difference]: Finished difference Result 109 states and 141 transitions. [2021-11-21 00:51:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 00:51:31,074 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 41 states have internal predecessors, (65), 5 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 35 [2021-11-21 00:51:31,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:31,075 INFO L225 Difference]: With dead ends: 109 [2021-11-21 00:51:31,075 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 00:51:31,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=273, Invalid=3633, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 00:51:31,082 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:31,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 466 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 311 Invalid, 0 Unknown, 63 Unchecked, 0.5s Time] [2021-11-21 00:51:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 00:51:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2021-11-21 00:51:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 48 states have internal predecessors, (62), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-21 00:51:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2021-11-21 00:51:31,113 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 35 [2021-11-21 00:51:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:31,114 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2021-11-21 00:51:31,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 41 states have internal predecessors, (65), 5 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 00:51:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2021-11-21 00:51:31,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-21 00:51:31,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:31,120 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:31,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:51:31,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:51:31,350 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:31,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1633385983, now seen corresponding path program 4 times [2021-11-21 00:51:31,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:31,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650735555] [2021-11-21 00:51:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:31,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 00:51:31,685 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650735555] [2021-11-21 00:51:31,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650735555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:51:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659880501] [2021-11-21 00:51:31,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:51:31,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:51:31,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:51:31,687 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:51:31,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:51:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-21 00:51:32,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:51:32,087 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 14 treesize of output 10 [2021-11-21 00:51:32,116 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-21 00:51:32,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-21 00:51:32,156 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-21 00:51:32,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 33 [2021-11-21 00:51:32,211 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-21 00:51:32,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-21 00:51:32,285 INFO L354 Elim1Store]: treesize reduction 164, result has 17.6 percent of original size [2021-11-21 00:51:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 56 [2021-11-21 00:51:32,397 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-21 00:51:32,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-21 00:51:32,559 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-21 00:51:32,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 93 [2021-11-21 00:51:32,783 INFO L354 Elim1Store]: treesize reduction 416, result has 13.0 percent of original size [2021-11-21 00:51:32,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 121 treesize of output 102 [2021-11-21 00:51:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:51:44,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:51:48,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 108 [2021-11-21 00:51:52,255 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int)) (let ((.cse0 (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1))))) is different from false [2021-11-21 00:51:54,298 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int)) (let ((.cse0 (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (< 0 (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (= (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1))))) is different from false [2021-11-21 00:51:56,400 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse0 (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1))))) is different from false [2021-11-21 00:51:58,521 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse0 (store (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 1) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 2)) (= (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< 0 (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256))))) is different from false [2021-11-21 00:52:00,654 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse0 (store (store (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 1) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 2) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 3))))) is different from false [2021-11-21 00:52:13,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 122 [2021-11-21 00:52:13,203 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:52:13,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12278 treesize of output 12270 [2021-11-21 00:57:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 30 not checked. [2021-11-21 00:57:03,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659880501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:57:03,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961029082] [2021-11-21 00:57:03,874 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 00:57:03,874 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:57:03,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:57:03,875 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:57:03,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:57:03,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:03,980 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 00:57:03,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 00:57:04,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:04,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:04,112 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 00:57:04,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 00:57:04,405 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 00:57:05,689 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 [2021-11-21 00:57:05,697 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 14 treesize of output 10 [2021-11-21 00:57:05,704 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 14 treesize of output 10 [2021-11-21 00:57:05,727 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 14 treesize of output 10 [2021-11-21 00:57:05,763 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-21 00:57:05,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 97 [2021-11-21 00:57:05,788 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 00:57:05,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-21 00:57:05,805 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 00:57:05,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-11-21 00:57:05,846 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 14 treesize of output 10 [2021-11-21 00:57:05,865 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 14 treesize of output 10 [2021-11-21 00:57:05,871 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 14 treesize of output 10 [2021-11-21 00:57:05,878 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 [2021-11-21 00:57:05,894 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 14 treesize of output 10 [2021-11-21 00:57:07,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:57:07,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:07,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:57:08,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:57:08,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:57:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:08,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:57:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:57:09,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 00:57:09,468 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 00:57:09,532 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 00:57:09,693 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 00:57:11,661 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 115 for LOIs [2021-11-21 00:57:18,420 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 14 treesize of output 10 [2021-11-21 00:57:18,446 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 14 treesize of output 10 [2021-11-21 00:57:18,464 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 [2021-11-21 00:57:18,512 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 14 treesize of output 10 [2021-11-21 00:57:18,708 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:57:23,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:57:23,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:57:23,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 24, 20] total 51 [2021-11-21 00:57:23,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139769617] [2021-11-21 00:57:23,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:57:23,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-21 00:57:23,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:57:23,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-21 00:57:23,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=3678, Unknown=15, NotChecked=630, Total=4556 [2021-11-21 00:57:23,384 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 51 states, 48 states have (on average 1.5) internal successors, (72), 49 states have internal predecessors, (72), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 00:57:26,046 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|))) (and (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse0 (store (store (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 1) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 2) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 3))))) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse1 (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1))))) (= |c_#Ultimate.C_memset_#value| (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| 1))) (= |c_#Ultimate.C_memset_#value| (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| 2))) (= |c_#Ultimate.C_memset_#t~loopctr676| 4) (= (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) |c_#Ultimate.C_memset_#value|) (= |c_#Ultimate.C_memset_#value| (select .cse2 |c_#Ultimate.C_memset_#ptr.offset|)) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse3 (store (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 1) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 2)) (= (mod (select .cse3 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< 0 (mod (select .cse3 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256))))))) is different from false [2021-11-21 00:57:28,073 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|)) (.cse5 (<= 5 |c_#Ultimate.C_memset_#t~loopctr676|))) (and (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse0 (store (store (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 1) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 2) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 3))))) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse1 (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1))))) (= |c_#Ultimate.C_memset_#value| (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| 4))) (= |c_#Ultimate.C_memset_#value| (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| 1))) (= |c_#Ultimate.C_memset_#value| (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| 2))) (= (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) |c_#Ultimate.C_memset_#value|) (= |c_#Ultimate.C_memset_#value| (select .cse2 |c_#Ultimate.C_memset_#ptr.offset|)) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse3 (store (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 1) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 2)) (= (mod (select .cse3 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< 0 (mod (select .cse3 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256))))) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int)) (let ((.cse4 (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (< 0 (mod (select .cse4 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (= (mod (select .cse4 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1))))) .cse5 (or (not (= 16 |c_#Ultimate.C_memset_#amount|)) (and (<= |c_#Ultimate.C_memset_#t~loopctr676| 5) .cse5)))) is different from false [2021-11-21 00:57:30,109 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|))) (and (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse0 (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1))))) (= |c_#Ultimate.C_memset_#value| (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 4))) (= |c_#Ultimate.C_memset_#value| (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 1))) (= |c_#Ultimate.C_memset_#value| (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 2))) (= (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) |c_#Ultimate.C_memset_#value|) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int)) (let ((.cse2 (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1))))) (or (not (= 16 |c_#Ultimate.C_memset_#amount|)) (and (<= 6 |c_#Ultimate.C_memset_#t~loopctr676|) (<= |c_#Ultimate.C_memset_#t~loopctr676| 6))) (= |c_#Ultimate.C_memset_#value| (select .cse1 |c_#Ultimate.C_memset_#ptr.offset|)) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse3 (store (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676| 1) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 2)) (= (mod (select .cse3 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< 0 (mod (select .cse3 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256))))) (exists ((|v_#Ultimate.C_memset_#t~loopctr676_131| Int)) (and (<= (+ |v_#Ultimate.C_memset_#t~loopctr676_131| 1) |c_#Ultimate.C_memset_#t~loopctr676|) (= |c_#Ultimate.C_memset_#value| (select (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_131|))) (<= 5 |v_#Ultimate.C_memset_#t~loopctr676_131|))) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int)) (let ((.cse4 (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (< 0 (mod (select .cse4 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (= (mod (select .cse4 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1))))))) is different from false [2021-11-21 00:57:32,156 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|))) (and (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int) (|v_#Ultimate.C_memset_#t~loopctr676_157| Int)) (let ((.cse0 (store (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_157|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse0 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_157| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |v_#Ultimate.C_memset_#t~loopctr676_157| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1))))) (= |c_#Ultimate.C_memset_#value| (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 4))) (= |c_#Ultimate.C_memset_#value| (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 1))) (= |c_#Ultimate.C_memset_#value| (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 2))) (= (select .cse1 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) |c_#Ultimate.C_memset_#value|) (exists ((|v_#Ultimate.C_memset_#t~loopctr676_131| Int) (|v_#Ultimate.C_memset_#t~loopctr676_132| Int)) (let ((.cse2 (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|))) (and (= |c_#Ultimate.C_memset_#value| (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_132|))) (= |c_#Ultimate.C_memset_#value| (select .cse2 (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_131|))) (<= (+ |v_#Ultimate.C_memset_#t~loopctr676_131| 1) |v_#Ultimate.C_memset_#t~loopctr676_132|) (<= (+ |v_#Ultimate.C_memset_#t~loopctr676_132| 1) |c_#Ultimate.C_memset_#t~loopctr676|) (<= 5 |v_#Ultimate.C_memset_#t~loopctr676_131|)))) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int)) (let ((.cse3 (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (= (mod (select .cse3 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< 0 (mod (select .cse3 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1))))) (= |c_#Ultimate.C_memset_#value| (select .cse1 |c_#Ultimate.C_memset_#ptr.offset|)) (or (not (= 16 |c_#Ultimate.C_memset_#amount|)) (and (<= |c_#Ultimate.C_memset_#t~loopctr676| 7) (<= 7 |c_#Ultimate.C_memset_#t~loopctr676|))) (forall ((|v_#Ultimate.C_memset_#t~loopctr676_155| Int) (|v_#Ultimate.C_memset_#t~loopctr676_156| Int)) (let ((.cse4 (store (store (store (select |c_#memory_int| |c_#Ultimate.C_memset_#ptr.base|) (+ |c_#Ultimate.C_memset_#ptr.offset| |c_#Ultimate.C_memset_#t~loopctr676|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_156|) |c_#Ultimate.C_memset_#value|) (+ |c_#Ultimate.C_memset_#ptr.offset| |v_#Ultimate.C_memset_#t~loopctr676_155|) |c_#Ultimate.C_memset_#value|))) (or (< 0 (mod (select .cse4 (+ |c_#Ultimate.C_memset_#ptr.offset| 3)) 256)) (= (mod (select .cse4 (+ |c_#Ultimate.C_memset_#ptr.offset| 4)) 256) 0) (< |v_#Ultimate.C_memset_#t~loopctr676_155| (+ |v_#Ultimate.C_memset_#t~loopctr676_156| 1)) (< |v_#Ultimate.C_memset_#t~loopctr676_156| (+ |c_#Ultimate.C_memset_#t~loopctr676| 1))))))) is different from false [2021-11-21 00:59:16,242 WARN L227 SmtUtils]: Spent 48.94s on a formula simplification. DAG size of input: 95 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:00:03,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:03,721 INFO L93 Difference]: Finished difference Result 141 states and 196 transitions. [2021-11-21 01:00:03,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 01:00:03,721 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.5) internal successors, (72), 49 states have internal predecessors, (72), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 38 [2021-11-21 01:00:03,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:03,723 INFO L225 Difference]: With dead ends: 141 [2021-11-21 01:00:03,723 INFO L226 Difference]: Without dead ends: 95 [2021-11-21 01:00:03,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 198.9s TimeCoverageRelationStatistics Valid=303, Invalid=4640, Unknown=63, NotChecked=1314, Total=6320 [2021-11-21 01:00:03,728 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:03,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 649 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 767 Invalid, 0 Unknown, 679 Unchecked, 2.3s Time] [2021-11-21 01:00:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-21 01:00:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2021-11-21 01:00:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 59 states have internal predecessors, (76), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-21 01:00:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 100 transitions. [2021-11-21 01:00:03,761 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 100 transitions. Word has length 38 [2021-11-21 01:00:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:03,762 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 100 transitions. [2021-11-21 01:00:03,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.5) internal successors, (72), 49 states have internal predecessors, (72), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:00:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 100 transitions. [2021-11-21 01:00:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 01:00:03,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:03,765 INFO L514 BasicCegarLoop]: trace histogram [9, 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] [2021-11-21 01:00:03,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:03,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:03,975 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:03,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1459241881, now seen corresponding path program 1 times [2021-11-21 01:00:03,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:03,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713160750] [2021-11-21 01:00:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:03,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:00:04,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:04,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713160750] [2021-11-21 01:00:04,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713160750] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:00:04,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:00:04,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:00:04,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78671332] [2021-11-21 01:00:04,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:00:04,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:00:04,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:04,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:00:04,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:00:04,095 INFO L87 Difference]: Start difference. First operand 75 states and 100 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:00:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:04,193 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-11-21 01:00:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:00:04,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2021-11-21 01:00:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:04,195 INFO L225 Difference]: With dead ends: 82 [2021-11-21 01:00:04,195 INFO L226 Difference]: Without dead ends: 75 [2021-11-21 01:00:04,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:00:04,197 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:04,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 139 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:00:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-21 01:00:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-21 01:00:04,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 59 states have internal predecessors, (76), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-21 01:00:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2021-11-21 01:00:04,237 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 42 [2021-11-21 01:00:04,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:04,237 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2021-11-21 01:00:04,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-21 01:00:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2021-11-21 01:00:04,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-21 01:00:04,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:04,246 INFO L514 BasicCegarLoop]: trace histogram [9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:04,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 01:00:04,247 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:04,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash 340537517, now seen corresponding path program 5 times [2021-11-21 01:00:04,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:04,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836428872] [2021-11-21 01:00:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:04,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:00:04,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836428872] [2021-11-21 01:00:04,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836428872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136534611] [2021-11-21 01:00:04,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:00:04,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:04,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:04,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:04,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:00:05,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-21 01:00:05,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:05,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-21 01:00:05,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:05,937 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 14 treesize of output 10 [2021-11-21 01:00:05,988 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:00:05,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-21 01:00:06,048 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-21 01:00:06,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:00:06,129 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-21 01:00:06,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-21 01:00:06,233 INFO L354 Elim1Store]: treesize reduction 172, result has 16.9 percent of original size [2021-11-21 01:00:06,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 49 treesize of output 57 [2021-11-21 01:00:06,378 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-21 01:00:06,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-21 01:00:06,584 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-21 01:00:06,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2021-11-21 01:00:06,839 INFO L354 Elim1Store]: treesize reduction 430, result has 12.6 percent of original size [2021-11-21 01:00:06,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 93 [2021-11-21 01:00:07,143 INFO L354 Elim1Store]: treesize reduction 550, result has 11.6 percent of original size [2021-11-21 01:00:07,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 86 treesize of output 106 [2021-11-21 01:00:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:00:07,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:07,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136534611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:07,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501086736] [2021-11-21 01:00:07,764 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:00:07,765 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:00:07,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:00:07,765 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:00:07,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:00:07,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:07,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:07,921 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:00:07,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:00:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:07,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 01:00:08,232 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 01:00:09,741 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 [2021-11-21 01:00:09,749 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 14 treesize of output 10 [2021-11-21 01:00:09,758 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 14 treesize of output 10 [2021-11-21 01:00:09,774 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 14 treesize of output 10 [2021-11-21 01:00:09,790 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 14 treesize of output 10 [2021-11-21 01:00:09,824 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-21 01:00:09,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 97 [2021-11-21 01:00:09,852 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:00:09,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-21 01:00:09,879 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:00:09,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-11-21 01:00:09,937 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 14 treesize of output 10 [2021-11-21 01:00:09,945 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 [2021-11-21 01:00:09,955 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 14 treesize of output 10 [2021-11-21 01:00:09,968 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 14 treesize of output 10 [2021-11-21 01:00:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:11,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:12,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:12,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:12,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:12,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:13,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:13,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:13,637 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 01:00:13,728 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 01:00:13,959 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 01:00:15,875 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 115 for LOIs [2021-11-21 01:00:23,238 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 14 treesize of output 10 [2021-11-21 01:00:23,290 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 14 treesize of output 10 [2021-11-21 01:00:23,343 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 [2021-11-21 01:00:23,405 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 14 treesize of output 10 [2021-11-21 01:00:23,531 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:00:26,779 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:00:26,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:00:26,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-21 01:00:26,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334075473] [2021-11-21 01:00:26,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:00:26,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 01:00:26,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:00:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 01:00:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2021-11-21 01:00:26,782 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:00:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:00:27,295 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2021-11-21 01:00:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 01:00:27,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-11-21 01:00:27,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:00:27,300 INFO L225 Difference]: With dead ends: 125 [2021-11-21 01:00:27,300 INFO L226 Difference]: Without dead ends: 75 [2021-11-21 01:00:27,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=146, Invalid=1576, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:00:27,302 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:00:27,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 217 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:00:27,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-21 01:00:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-21 01:00:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 59 states have internal predecessors, (75), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-21 01:00:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-11-21 01:00:27,325 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 41 [2021-11-21 01:00:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:00:27,325 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-11-21 01:00:27,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-21 01:00:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-11-21 01:00:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-21 01:00:27,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:00:27,327 INFO L514 BasicCegarLoop]: trace histogram [12, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:00:27,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:00:27,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:00:27,543 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:00:27,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:00:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash 89954689, now seen corresponding path program 6 times [2021-11-21 01:00:27,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:00:27,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264029113] [2021-11-21 01:00:27,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:00:27,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:00:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:00:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-21 01:00:28,226 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:00:28,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264029113] [2021-11-21 01:00:28,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264029113] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:00:28,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063938772] [2021-11-21 01:00:28,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:00:28,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:00:28,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:28,235 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:00:28,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:00:28,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:00:28,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:00:28,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-21 01:00:28,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:00:28,502 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 14 treesize of output 10 [2021-11-21 01:00:28,552 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:00:28,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-21 01:00:28,624 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-21 01:00:28,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-11-21 01:00:28,714 INFO L354 Elim1Store]: treesize reduction 110, result has 19.1 percent of original size [2021-11-21 01:00:28,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 45 [2021-11-21 01:00:28,837 INFO L354 Elim1Store]: treesize reduction 178, result has 16.8 percent of original size [2021-11-21 01:00:28,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 58 [2021-11-21 01:00:29,008 INFO L354 Elim1Store]: treesize reduction 260, result has 15.0 percent of original size [2021-11-21 01:00:29,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 71 [2021-11-21 01:00:29,203 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-21 01:00:29,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 66 treesize of output 80 [2021-11-21 01:00:29,429 INFO L354 Elim1Store]: treesize reduction 416, result has 13.0 percent of original size [2021-11-21 01:00:29,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 92 [2021-11-21 01:00:29,768 INFO L354 Elim1Store]: treesize reduction 540, result has 11.6 percent of original size [2021-11-21 01:00:29,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 85 treesize of output 105 [2021-11-21 01:00:30,198 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-21 01:00:30,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 93 treesize of output 116 [2021-11-21 01:00:30,583 INFO L354 Elim1Store]: treesize reduction 796, result has 10.1 percent of original size [2021-11-21 01:00:30,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 103 treesize of output 129 [2021-11-21 01:00:31,059 INFO L354 Elim1Store]: treesize reduction 920, result has 9.6 percent of original size [2021-11-21 01:00:31,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 111 treesize of output 140 [2021-11-21 01:00:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:33,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:00:40,814 WARN L227 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 119 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:00:44,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2021-11-21 01:00:44,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102320 treesize of output 102316 [2021-11-21 01:00:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:00:45,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063938772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:00:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344390342] [2021-11-21 01:00:45,887 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:00:45,887 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:00:45,888 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:00:45,888 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:00:45,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:00:45,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:45,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,018 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:00:46,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:00:46,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:46,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-21 01:00:46,333 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 01:00:47,662 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 14 treesize of output 10 [2021-11-21 01:00:47,672 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 [2021-11-21 01:00:47,680 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 14 treesize of output 10 [2021-11-21 01:00:47,690 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 14 treesize of output 10 [2021-11-21 01:00:47,709 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 14 treesize of output 10 [2021-11-21 01:00:47,735 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-21 01:00:47,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 97 [2021-11-21 01:00:47,756 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:00:47,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 93 [2021-11-21 01:00:47,779 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:00:47,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2021-11-21 01:00:47,835 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 14 treesize of output 10 [2021-11-21 01:00:47,843 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 14 treesize of output 10 [2021-11-21 01:00:47,854 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 [2021-11-21 01:00:47,863 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 14 treesize of output 10 [2021-11-21 01:00:48,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:48,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:49,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:50,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:50,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:50,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:50,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:00:50,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:00:51,516 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 01:00:51,585 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 01:00:51,742 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 01:00:53,673 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 115 for LOIs [2021-11-21 01:01:00,746 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 14 treesize of output 10 [2021-11-21 01:01:00,762 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 [2021-11-21 01:01:00,795 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 14 treesize of output 10 [2021-11-21 01:01:00,823 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 14 treesize of output 10 [2021-11-21 01:01:01,008 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:01:06,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:01:06,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:01:06,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 23] total 58 [2021-11-21 01:01:06,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495395101] [2021-11-21 01:01:06,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:01:06,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-21 01:01:06,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:06,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-21 01:01:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=5059, Unknown=0, NotChecked=0, Total=5550 [2021-11-21 01:01:06,491 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:01:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:08,969 INFO L93 Difference]: Finished difference Result 131 states and 174 transitions. [2021-11-21 01:01:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-21 01:01:08,970 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 42 [2021-11-21 01:01:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:08,971 INFO L225 Difference]: With dead ends: 131 [2021-11-21 01:01:08,971 INFO L226 Difference]: Without dead ends: 74 [2021-11-21 01:01:08,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=596, Invalid=5566, Unknown=0, NotChecked=0, Total=6162 [2021-11-21 01:01:08,974 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:08,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 494 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 621 Invalid, 0 Unknown, 73 Unchecked, 1.7s Time] [2021-11-21 01:01:08,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-21 01:01:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-11-21 01:01:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.3454545454545455) internal successors, (74), 57 states have internal predecessors, (74), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-21 01:01:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2021-11-21 01:01:08,993 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 42 [2021-11-21 01:01:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:08,994 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2021-11-21 01:01:08,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-21 01:01:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2021-11-21 01:01:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 01:01:08,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:08,995 INFO L514 BasicCegarLoop]: trace histogram [13, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:09,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:09,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 01:01:09,209 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:09,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1656559315, now seen corresponding path program 7 times [2021-11-21 01:01:09,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:09,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272855218] [2021-11-21 01:01:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:09,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 01:01:09,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272855218] [2021-11-21 01:01:09,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272855218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375716763] [2021-11-21 01:01:09,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:01:09,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:09,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:09,828 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:09,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f80518d4-3d12-4d14-a967-8da31e8c62e1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:01:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:10,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-21 01:01:10,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:10,504 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 14 treesize of output 10 [2021-11-21 01:01:10,550 INFO L354 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2021-11-21 01:01:10,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-21 01:01:10,617 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-21 01:01:10,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-21 01:01:10,734 INFO L354 Elim1Store]: treesize reduction 135, result has 18.7 percent of original size [2021-11-21 01:01:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 50 [2021-11-21 01:01:10,846 INFO L354 Elim1Store]: treesize reduction 208, result has 16.5 percent of original size [2021-11-21 01:01:10,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 63 [2021-11-21 01:01:10,985 INFO L354 Elim1Store]: treesize reduction 236, result has 15.7 percent of original size [2021-11-21 01:01:10,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 68 [2021-11-21 01:01:11,170 INFO L354 Elim1Store]: treesize reduction 320, result has 14.2 percent of original size [2021-11-21 01:01:11,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2021-11-21 01:01:11,437 INFO L354 Elim1Store]: treesize reduction 416, result has 13.0 percent of original size [2021-11-21 01:01:11,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 88 treesize of output 105 [2021-11-21 01:01:11,794 INFO L354 Elim1Store]: treesize reduction 524, result has 11.9 percent of original size [2021-11-21 01:01:11,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 102 treesize of output 122 [2021-11-21 01:01:12,237 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-21 01:01:12,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 116 treesize of output 139 [2021-11-21 01:01:14,839 INFO L354 Elim1Store]: treesize reduction 776, result has 10.3 percent of original size [2021-11-21 01:01:14,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 55 case distinctions, treesize of input 130 treesize of output 156 [2021-11-21 01:01:19,574 INFO L354 Elim1Store]: treesize reduction 920, result has 9.6 percent of original size [2021-11-21 01:01:19,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 144 treesize of output 173 [2021-11-21 01:01:25,503 INFO L354 Elim1Store]: treesize reduction 1076, result has 9.0 percent of original size [2021-11-21 01:01:25,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 153 treesize of output 185 [2021-11-21 01:01:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 16 proven. 100 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:01:54,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:02,536 WARN L227 SmtUtils]: Spent 6.29s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:02:11,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2021-11-21 01:02:11,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2997 treesize of output 2993 [2021-11-21 01:02:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 47 proven. 53 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-21 01:02:11,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375716763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:11,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588866366] [2021-11-21 01:02:11,722 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-21 01:02:11,723 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:11,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:11,724 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:11,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:02:11,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:11,830 INFO L354 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2021-11-21 01:02:11,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2021-11-21 01:02:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:11,963 INFO L354 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2021-11-21 01:02:11,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2021-11-21 01:02:12,287 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_reset with input of size 111 for LOIs [2021-11-21 01:02:13,662 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 11 treesize of output 7 [2021-11-21 01:02:13,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:02:13,676 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 11 treesize of output 7 [2021-11-21 01:02:13,685 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 [2021-11-21 01:02:13,725 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:02:13,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 88 [2021-11-21 01:02:13,751 INFO L354 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2021-11-21 01:02:13,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 91 [2021-11-21 01:02:13,775 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-21 01:02:13,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 94 [2021-11-21 01:02:13,864 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 14 treesize of output 10 [2021-11-21 01:02:13,885 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 [2021-11-21 01:02:13,893 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 14 treesize of output 10 [2021-11-21 01:02:13,915 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 14 treesize of output 10 [2021-11-21 01:02:13,926 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 14 treesize of output 10 [2021-11-21 01:02:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:02:15,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:15,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:02:16,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:02:16,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:16,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:02:17,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:02:17,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:02:17,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2021-11-21 01:02:17,663 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2021-11-21 01:02:17,738 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 104 for LOIs [2021-11-21 01:02:17,913 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 58 for LOIs [2021-11-21 01:02:20,042 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 115 for LOIs [2021-11-21 01:02:27,135 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 14 treesize of output 10 [2021-11-21 01:02:27,219 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 [2021-11-21 01:02:27,236 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 14 treesize of output 10 [2021-11-21 01:02:27,267 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 14 treesize of output 10 [2021-11-21 01:02:27,431 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:02:33,793 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:02:33,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:02:33,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 19] total 57 [2021-11-21 01:02:33,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142929577] [2021-11-21 01:02:33,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:02:33,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-21 01:02:33,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:02:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-21 01:02:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=5031, Unknown=13, NotChecked=0, Total=5402 [2021-11-21 01:02:33,798 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 57 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 4 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7)