./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_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_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/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_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/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_5e9a8416-b20f-4640-b010-b3de75203210/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 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:35:05,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:35:05,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:35:05,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:35:05,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:35:05,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:35:05,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:35:05,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:35:05,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:35:05,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:35:05,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:35:05,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:35:05,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:35:05,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:35:05,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:35:05,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:35:05,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:35:05,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:35:05,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:35:05,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:35:05,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:35:05,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:35:05,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:35:05,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:35:05,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:35:05,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:35:05,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:35:05,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:35:05,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:35:05,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:35:05,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:35:05,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:35:05,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:35:05,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:35:05,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:35:05,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:35:05,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:35:05,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:35:05,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:35:05,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:35:05,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:35:05,526 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:35:05,572 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:35:05,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:35:05,573 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:35:05,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:35:05,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:35:05,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:35:05,575 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:35:05,575 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:35:05,576 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:35:05,576 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:35:05,576 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:35:05,576 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:35:05,577 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:35:05,577 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:35:05,577 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:35:05,578 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:35:05,578 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:35:05,578 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:35:05,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:35:05,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:35:05,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:35:05,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:35:05,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:35:05,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:35:05,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:35:05,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:35:05,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:35:05,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:35:05,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:35:05,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:35:05,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:35:05,583 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:35:05,583 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:35:05,584 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:35:05,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:35:05,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:35:05,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:35:05,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:35:05,585 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_5e9a8416-b20f-4640-b010-b3de75203210/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9248d62da968900adf628e209d21739bec2ffe4f64c1d45016706037787190a6 [2021-11-21 01:35:05,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:35:05,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:35:05,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:35:05,981 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:35:05,982 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:35:05,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-11-21 01:35:06,084 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/data/615cfd4f6/27b5f0fc8e8542b2b9099b6f918542c4/FLAG993be1fd9 [2021-11-21 01:35:07,098 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:35:07,099 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i [2021-11-21 01:35:07,160 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/data/615cfd4f6/27b5f0fc8e8542b2b9099b6f918542c4/FLAG993be1fd9 [2021-11-21 01:35:07,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/data/615cfd4f6/27b5f0fc8e8542b2b9099b6f918542c4 [2021-11-21 01:35:07,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:35:07,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:35:07,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:35:07,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:35:07,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:35:07,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:35:07" (1/1) ... [2021-11-21 01:35:07,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e8314c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:07, skipping insertion in model container [2021-11-21 01:35:07,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:35:07" (1/1) ... [2021-11-21 01:35:07,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:35:07,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:35:08,075 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_5e9a8416-b20f-4640-b010-b3de75203210/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-11-21 01:35:08,087 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_5e9a8416-b20f-4640-b010-b3de75203210/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-11-21 01:35:09,408 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:09,409 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:09,410 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:09,411 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:09,413 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:09,435 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:09,438 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:09,440 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:09,441 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:09,975 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:35:09,977 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:35:09,978 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:35:09,980 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:35:09,982 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:35:09,983 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:35:09,984 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:35:09,985 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:35:09,986 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:35:09,987 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:35:10,192 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:35:10,330 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,331 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,473 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:35:10,552 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:35:10,586 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_5e9a8416-b20f-4640-b010-b3de75203210/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4496,4509] [2021-11-21 01:35:10,586 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_5e9a8416-b20f-4640-b010-b3de75203210/sv-benchmarks/c/aws-c-common/aws_byte_buf_init_copy_harness.i[4556,4569] [2021-11-21 01:35:10,671 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,672 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,672 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,673 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,674 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,681 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,682 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,683 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,684 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,723 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-21 01:35:10,724 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-21 01:35:10,725 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-21 01:35:10,725 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-21 01:35:10,727 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-21 01:35:10,727 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-21 01:35:10,728 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-21 01:35:10,728 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-21 01:35:10,729 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-21 01:35:10,730 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-21 01:35:10,753 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-21 01:35:10,879 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,879 WARN L1533 CHandler]: Possible shadowing of function index [2021-11-21 01:35:10,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:35:11,182 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:35:11,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11 WrapperNode [2021-11-21 01:35:11,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:35:11,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:35:11,184 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:35:11,184 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:35:11,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,531 INFO L137 Inliner]: procedures = 691, calls = 2624, calls flagged for inlining = 63, calls inlined = 11, statements flattened = 937 [2021-11-21 01:35:11,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:35:11,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:35:11,533 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:35:11,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:35:11,545 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:35:11,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:35:11,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:35:11,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:35:11,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (1/1) ... [2021-11-21 01:35:11,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:35:11,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:11,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:35:11,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:35:11,767 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-21 01:35:11,767 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-21 01:35:11,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:35:11,769 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-21 01:35:11,770 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-21 01:35:11,770 INFO L130 BoogieDeclarations]: Found specification of procedure aws_allocator_is_valid [2021-11-21 01:35:11,770 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_allocator_is_valid [2021-11-21 01:35:11,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:35:11,771 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2021-11-21 01:35:11,771 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2021-11-21 01:35:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-21 01:35:11,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-21 01:35:11,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:35:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:35:11,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:35:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-21 01:35:11,774 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-21 01:35:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:35:11,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:35:11,774 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-21 01:35:11,775 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-21 01:35:11,775 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-21 01:35:11,775 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-21 01:35:11,776 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2021-11-21 01:35:11,777 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2021-11-21 01:35:11,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 01:35:11,778 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 01:35:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:35:11,778 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:35:11,778 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-21 01:35:11,779 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-21 01:35:11,779 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_acquire [2021-11-21 01:35:11,779 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_acquire [2021-11-21 01:35:11,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:35:11,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:35:11,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:35:11,780 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-21 01:35:11,780 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-21 01:35:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-21 01:35:11,781 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-21 01:35:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:35:11,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:35:12,178 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:35:12,194 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:35:13,740 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:35:14,077 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:35:14,078 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-21 01:35:14,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:35:14 BoogieIcfgContainer [2021-11-21 01:35:14,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:35:14,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:35:14,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:35:14,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:35:14,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:35:07" (1/3) ... [2021-11-21 01:35:14,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dad46e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:35:14, skipping insertion in model container [2021-11-21 01:35:14,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:11" (2/3) ... [2021-11-21 01:35:14,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dad46e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:35:14, skipping insertion in model container [2021-11-21 01:35:14,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:35:14" (3/3) ... [2021-11-21 01:35:14,097 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_init_copy_harness.i [2021-11-21 01:35:14,108 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:35:14,108 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:35:14,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:35:14,202 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 01:35:14,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:35:14,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 146 states, 83 states have (on average 1.216867469879518) internal successors, (101), 82 states have internal predecessors, (101), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2021-11-21 01:35:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-21 01:35:14,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:14,255 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:14,255 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:14,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2093001623, now seen corresponding path program 1 times [2021-11-21 01:35:14,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:14,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713312337] [2021-11-21 01:35:14,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:14,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:15,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-21 01:35:15,055 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:15,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713312337] [2021-11-21 01:35:15,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713312337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:15,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:15,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 01:35:15,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111696445] [2021-11-21 01:35:15,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:15,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 01:35:15,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:15,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 01:35:15,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 01:35:15,109 INFO L87 Difference]: Start difference. First operand has 146 states, 83 states have (on average 1.216867469879518) internal successors, (101), 82 states have internal predecessors, (101), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Second operand has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:35:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:15,320 INFO L93 Difference]: Finished difference Result 269 states and 374 transitions. [2021-11-21 01:35:15,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 01:35:15,322 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 57 [2021-11-21 01:35:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:15,336 INFO L225 Difference]: With dead ends: 269 [2021-11-21 01:35:15,336 INFO L226 Difference]: Without dead ends: 143 [2021-11-21 01:35:15,341 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 01:35:15,345 INFO L933 BasicCegarLoop]: 173 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:15,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 173 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:35:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-21 01:35:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-11-21 01:35:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 79 states have internal predecessors, (90), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-21 01:35:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-11-21 01:35:15,442 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 57 [2021-11-21 01:35:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:15,445 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-11-21 01:35:15,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.0) internal successors, (24), 2 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-21 01:35:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-11-21 01:35:15,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-21 01:35:15,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:15,456 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:15,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:35:15,456 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:15,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1198738088, now seen corresponding path program 1 times [2021-11-21 01:35:15,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:15,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698714291] [2021-11-21 01:35:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:15,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 01:35:15,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:15,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698714291] [2021-11-21 01:35:15,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698714291] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:15,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:15,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 01:35:15,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475200780] [2021-11-21 01:35:15,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:15,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:35:15,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:15,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:35:15,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:35:15,964 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-21 01:35:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:16,314 INFO L93 Difference]: Finished difference Result 192 states and 246 transitions. [2021-11-21 01:35:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:35:16,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 62 [2021-11-21 01:35:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:16,320 INFO L225 Difference]: With dead ends: 192 [2021-11-21 01:35:16,322 INFO L226 Difference]: Without dead ends: 137 [2021-11-21 01:35:16,325 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 01:35:16,328 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 1 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:16,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 828 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:35:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-21 01:35:16,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-21 01:35:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 74 states have (on average 1.135135135135135) internal successors, (84), 75 states have internal predecessors, (84), 47 states have call successors, (47), 15 states have call predecessors, (47), 15 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-21 01:35:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2021-11-21 01:35:16,363 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 62 [2021-11-21 01:35:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:16,364 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2021-11-21 01:35:16,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-21 01:35:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2021-11-21 01:35:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:35:16,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:16,373 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:16,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:35:16,373 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:16,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1104143037, now seen corresponding path program 1 times [2021-11-21 01:35:16,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:16,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863777348] [2021-11-21 01:35:16,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:16,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 01:35:16,965 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863777348] [2021-11-21 01:35:16,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863777348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:16,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:16,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:35:16,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338248851] [2021-11-21 01:35:16,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:16,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:35:16,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:16,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:35:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:35:16,967 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-21 01:35:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:17,165 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2021-11-21 01:35:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:35:17,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 66 [2021-11-21 01:35:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:17,171 INFO L225 Difference]: With dead ends: 194 [2021-11-21 01:35:17,173 INFO L226 Difference]: Without dead ends: 138 [2021-11-21 01:35:17,176 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 01:35:17,179 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 1 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:17,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 472 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:35:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-21 01:35:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-11-21 01:35:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 76 states have internal predecessors, (85), 47 states have call successors, (47), 15 states have call predecessors, (47), 15 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-21 01:35:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 178 transitions. [2021-11-21 01:35:17,212 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 178 transitions. Word has length 66 [2021-11-21 01:35:17,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:17,215 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 178 transitions. [2021-11-21 01:35:17,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-21 01:35:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 178 transitions. [2021-11-21 01:35:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 01:35:17,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:17,222 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:17,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:35:17,223 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:17,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1912526706, now seen corresponding path program 1 times [2021-11-21 01:35:17,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:17,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076095420] [2021-11-21 01:35:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:17,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 01:35:17,806 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076095420] [2021-11-21 01:35:17,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076095420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:35:17,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155818220] [2021-11-21 01:35:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:17,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:17,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:17,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:17,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e9a8416-b20f-4640-b010-b3de75203210/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:35:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:18,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-21 01:35:18,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:18,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-21 01:35:19,606 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 16 treesize of output 8 [2021-11-21 01:35:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-21 01:35:19,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:19,919 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 40 treesize of output 34 [2021-11-21 01:35:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 01:35:20,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155818220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:20,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [390486739] [2021-11-21 01:35:20,081 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2021-11-21 01:35:20,081 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:20,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:20,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:20,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:27,566 INFO L244 Elim1Store]: Index analysis took 728 ms [2021-11-21 01:36:06,198 WARN L227 SmtUtils]: Spent 38.52s on a formula simplification. DAG size of input: 2172 DAG size of output: 1185 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-21 01:36:06,206 INFO L354 Elim1Store]: treesize reduction 3546, result has 33.3 percent of original size [2021-11-21 01:36:06,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 200 select indices, 200 select index equivalence classes, 19703 disjoint index pairs (out of 19900 index pairs), introduced 200 new quantified variables, introduced 394 case distinctions, treesize of input 1007 treesize of output 2389 [2021-11-21 01:36:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:51,461 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-11-21 01:36:51,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 198 select indices, 198 select index equivalence classes, 19701 disjoint index pairs (out of 19503 index pairs), introduced 198 new quantified variables, introduced 0 case distinctions, treesize of input 997 treesize of output 1590