./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --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 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:08:14,041 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:08:14,114 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:08:14,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:08:14,120 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:08:14,150 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:08:14,151 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:08:14,152 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:08:14,152 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:08:14,153 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:08:14,154 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:08:14,154 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:08:14,155 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:08:14,156 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:08:14,156 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:08:14,157 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:08:14,157 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:08:14,158 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:08:14,159 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:08:14,159 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:08:14,160 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:08:14,161 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:08:14,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:08:14,162 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:08:14,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:08:14,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:08:14,164 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:08:14,164 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:08:14,165 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:08:14,165 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:08:14,166 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:08:14,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:08:14,167 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:08:14,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:08:14,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:14,168 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:08:14,169 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:08:14,169 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:08:14,170 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:08:14,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:08:14,170 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:08:14,171 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:08:14,171 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:08:14,172 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:08:14,172 INFO L153 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_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f [2023-11-25 00:08:14,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:08:14,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:08:14,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:08:14,501 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:08:14,501 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:08:14,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2023-11-25 00:08:17,876 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:08:18,426 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:08:18,427 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2023-11-25 00:08:18,469 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/data/a2d27ecad/1ab6cbd56d594a1ba9fbaaa367b9a76d/FLAG1cdcb66b0 [2023-11-25 00:08:18,493 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/data/a2d27ecad/1ab6cbd56d594a1ba9fbaaa367b9a76d [2023-11-25 00:08:18,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:08:18,497 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:08:18,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:18,499 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:08:18,506 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:08:18,509 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:18" (1/1) ... [2023-11-25 00:08:18,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75a18cab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:18, skipping insertion in model container [2023-11-25 00:08:18,511 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:08:18" (1/1) ... [2023-11-25 00:08:18,667 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:08:18,963 WARN L240 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_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2023-11-25 00:08:18,971 WARN L240 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_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2023-11-25 00:08:19,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,913 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,914 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,915 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,917 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,934 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,935 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,937 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,938 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,941 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,942 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,943 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:19,944 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,322 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:08:20,324 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:08:20,325 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:08:20,327 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:08:20,329 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:08:20,329 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:08:20,330 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:08:20,331 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:08:20,332 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:08:20,333 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:08:20,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:20,563 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:08:20,593 WARN L240 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_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2023-11-25 00:08:20,594 WARN L240 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_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2023-11-25 00:08:20,649 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,649 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,650 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,650 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,652 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,663 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,676 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,678 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,680 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,682 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,687 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,687 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,688 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:08:20,761 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:08:20,762 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:08:20,764 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:08:20,765 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:08:20,775 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:08:20,776 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:08:20,777 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:08:20,779 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:08:20,780 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:08:20,781 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:08:20,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:08:21,138 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,138 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,138 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,139 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,139 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,139 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,139 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,139 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,139 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,140 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,140 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,140 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,140 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,140 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,140 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:08:21,148 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:08:21,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21 WrapperNode [2023-11-25 00:08:21,149 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:08:21,150 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:21,151 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:08:21,151 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:08:21,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,240 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,277 INFO L138 Inliner]: procedures = 678, calls = 1039, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 56 [2023-11-25 00:08:21,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:08:21,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:08:21,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:08:21,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:08:21,292 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,326 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,340 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,344 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:08:21,352 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:08:21,352 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:08:21,366 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:08:21,367 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (1/1) ... [2023-11-25 00:08:21,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:08:21,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:21,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:08:21,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:08:21,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:08:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:08:21,464 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:08:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2023-11-25 00:08:21,464 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2023-11-25 00:08:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:08:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:08:21,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:08:21,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:08:21,465 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:08:21,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:08:21,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:08:21,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:08:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:08:21,467 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2023-11-25 00:08:21,467 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2023-11-25 00:08:21,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:08:21,745 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:08:21,747 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:08:21,919 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:08:22,042 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:08:22,042 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-25 00:08:22,044 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:22 BoogieIcfgContainer [2023-11-25 00:08:22,046 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:08:22,049 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:08:22,049 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:08:22,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:08:22,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:08:18" (1/3) ... [2023-11-25 00:08:22,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798b4d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:22, skipping insertion in model container [2023-11-25 00:08:22,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:08:21" (2/3) ... [2023-11-25 00:08:22,058 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@798b4d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:08:22, skipping insertion in model container [2023-11-25 00:08:22,059 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:08:22" (3/3) ... [2023-11-25 00:08:22,061 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_prev_harness.i [2023-11-25 00:08:22,082 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:08:22,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:08:22,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:08:22,190 INFO L357 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=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55b82550, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:08:22,191 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:08:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-25 00:08:22,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-25 00:08:22,206 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:22,208 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:22,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:22,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash -660850364, now seen corresponding path program 1 times [2023-11-25 00:08:22,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:22,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588457195] [2023-11-25 00:08:22,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:22,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:08:24,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:24,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588457195] [2023-11-25 00:08:24,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588457195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:08:24,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:08:24,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-25 00:08:24,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876265644] [2023-11-25 00:08:24,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:08:24,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-25 00:08:24,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:08:24,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-25 00:08:24,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:08:24,468 INFO L87 Difference]: Start difference. First operand has 33 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:08:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:08:24,707 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2023-11-25 00:08:24,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-25 00:08:24,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 15 [2023-11-25 00:08:24,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:08:24,718 INFO L225 Difference]: With dead ends: 62 [2023-11-25 00:08:24,718 INFO L226 Difference]: Without dead ends: 35 [2023-11-25 00:08:24,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-25 00:08:24,726 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-25 00:08:24,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-25 00:08:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-25 00:08:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-25 00:08:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-25 00:08:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-25 00:08:24,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 15 [2023-11-25 00:08:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:08:24,774 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-25 00:08:24,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-25 00:08:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-25 00:08:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-25 00:08:24,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:08:24,776 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-25 00:08:24,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:08:24,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:08:24,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:08:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1080021711, now seen corresponding path program 1 times [2023-11-25 00:08:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:08:24,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532926211] [2023-11-25 00:08:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:24,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:08:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:08:27,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:08:27,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532926211] [2023-11-25 00:08:27,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532926211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:08:27,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617480692] [2023-11-25 00:08:27,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:08:27,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:08:27,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:08:27,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:08:27,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d05acf7-9660-44ed-a3d4-49dd24ac2a1e/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:08:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:08:27,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 87 conjunts are in the unsatisfiable core [2023-11-25 00:08:27,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:08:27,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2023-11-25 00:08:27,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-11-25 00:08:27,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 11 [2023-11-25 00:08:30,737 INFO L349 Elim1Store]: treesize reduction 13, result has 60.6 percent of original size [2023-11-25 00:08:30,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 180 treesize of output 104 [2023-11-25 00:08:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:08:30,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-25 00:08:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-25 00:08:37,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617480692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-25 00:08:37,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1228215475] [2023-11-25 00:08:37,447 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-11-25 00:08:37,447 INFO L166 IcfgInterpreter]: Building call graph [2023-11-25 00:08:37,451 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-25 00:08:37,456 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-25 00:08:37,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-25 00:08:39,294 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 218 for LOIs [2023-11-25 00:08:39,932 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 147 for LOIs [2023-11-25 00:08:39,979 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 191 for LOIs [2023-11-25 00:08:40,173 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 166 for LOIs [2023-11-25 00:08:40,273 INFO L180 IcfgInterpreter]: Interpretation finished