./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh --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 3291a42fe07f6436518a88837ad319dbbcce43574240f2329ceda775b341d986 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:37:59,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:37:59,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:37:59,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:37:59,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:37:59,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:37:59,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:37:59,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:37:59,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:37:59,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:37:59,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:37:59,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:37:59,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:37:59,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:37:59,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:37:59,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:37:59,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:37:59,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:37:59,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:37:59,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:37:59,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:37:59,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:37:59,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:37:59,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:37:59,113 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:37:59,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:37:59,114 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:37:59,114 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:37:59,115 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:37:59,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:37:59,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:37:59,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:37:59,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:37:59,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:37:59,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:37:59,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:37:59,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:37:59,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:37:59,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:37:59,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:37:59,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:37:59,121 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-12-14 08:37:59,138 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:37:59,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:37:59,139 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:37:59,139 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:37:59,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:37:59,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:37:59,139 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:37:59,140 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:37:59,140 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:37:59,140 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:37:59,140 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:37:59,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:37:59,140 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:37:59,140 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:37:59,140 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:37:59,141 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:37:59,141 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:37:59,141 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:37:59,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:37:59,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:37:59,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:37:59,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:37:59,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:37:59,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:37:59,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:37:59,142 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:37:59,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:37:59,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:37:59,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:37:59,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:37:59,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:37:59,143 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:37:59,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:37:59,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:37:59,143 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:37:59,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:37:59,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:37:59,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:37:59,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3291a42fe07f6436518a88837ad319dbbcce43574240f2329ceda775b341d986 [2022-12-14 08:37:59,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:37:59,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:37:59,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:37:59,328 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:37:59,328 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:37:59,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness_negated.i [2022-12-14 08:38:01,897 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:38:02,265 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:38:02,266 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness_negated.i [2022-12-14 08:38:02,286 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/data/98a305ec0/48002abe5a2b4883b8fd2a47a9d362d4/FLAG90da0514c [2022-12-14 08:38:02,481 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/data/98a305ec0/48002abe5a2b4883b8fd2a47a9d362d4 [2022-12-14 08:38:02,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:38:02,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:38:02,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:38:02,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:38:02,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:38:02,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:38:02" (1/1) ... [2022-12-14 08:38:02,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d4de2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:02, skipping insertion in model container [2022-12-14 08:38:02,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:38:02" (1/1) ... [2022-12-14 08:38:02,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:38:02,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:38:02,738 WARN L237 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_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness_negated.i[4496,4509] [2022-12-14 08:38:02,743 WARN L237 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_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness_negated.i[4556,4569] [2022-12-14 08:38:03,255 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,256 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,256 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,257 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,258 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,268 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,268 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,270 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,271 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,272 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,273 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,273 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,274 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,334 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:38:03,335 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:38:03,335 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:38:03,339 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 08:38:03,340 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 08:38:03,340 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 08:38:03,549 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 08:38:03,550 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 08:38:03,551 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 08:38:03,551 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 08:38:03,552 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 08:38:03,553 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 08:38:03,554 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 08:38:03,554 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 08:38:03,555 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 08:38:03,555 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 08:38:03,556 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 08:38:03,661 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 08:38:03,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:38:03,690 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:38:03,700 WARN L237 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_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness_negated.i[4496,4509] [2022-12-14 08:38:03,700 WARN L237 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_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/sv-benchmarks/c/aws-c-common/aws_linked_list_remove_harness_negated.i[4556,4569] [2022-12-14 08:38:03,729 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,730 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,730 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,731 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,731 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,737 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,738 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,739 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,739 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,740 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,741 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,741 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,741 WARN L1576 CHandler]: Possible shadowing of function index [2022-12-14 08:38:03,747 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:38:03,748 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:38:03,748 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-12-14 08:38:03,751 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-12-14 08:38:03,752 WARN L623 FunctionHandler]: Unknown extern function htons [2022-12-14 08:38:03,753 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-12-14 08:38:03,773 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-12-14 08:38:03,774 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-12-14 08:38:03,775 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-12-14 08:38:03,775 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-12-14 08:38:03,776 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-12-14 08:38:03,777 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-12-14 08:38:03,777 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-12-14 08:38:03,778 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-12-14 08:38:03,778 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-12-14 08:38:03,778 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-12-14 08:38:03,779 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-12-14 08:38:03,798 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-12-14 08:38:03,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:38:03,928 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:38:03,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03 WrapperNode [2022-12-14 08:38:03,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:38:03,929 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:38:03,929 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:38:03,929 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:38:03,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:03,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:03,989 INFO L138 Inliner]: procedures = 679, calls = 1047, calls flagged for inlining = 49, calls inlined = 4, statements flattened = 88 [2022-12-14 08:38:03,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:38:03,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:38:03,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:38:03,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:38:03,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:03,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:03,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:03,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:04,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:04,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:04,010 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:04,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:04,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:38:04,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:38:04,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:38:04,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:38:04,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (1/1) ... [2022-12-14 08:38:04,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:38:04,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:04,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:38:04,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:38:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_mem_zeroed [2022-12-14 08:38:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_mem_zeroed [2022-12-14 08:38:04,066 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_remove [2022-12-14 08:38:04,066 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_remove [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 08:38:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-12-14 08:38:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:38:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-14 08:38:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 08:38:04,067 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 08:38:04,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:38:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 08:38:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 08:38:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-12-14 08:38:04,068 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-12-14 08:38:04,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:38:04,258 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:38:04,260 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:38:04,477 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:38:04,545 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:38:04,545 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 08:38:04,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:38:04 BoogieIcfgContainer [2022-12-14 08:38:04,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:38:04,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:38:04,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:38:04,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:38:04,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:38:02" (1/3) ... [2022-12-14 08:38:04,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a85aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:38:04, skipping insertion in model container [2022-12-14 08:38:04,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:38:03" (2/3) ... [2022-12-14 08:38:04,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35a85aa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:38:04, skipping insertion in model container [2022-12-14 08:38:04,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:38:04" (3/3) ... [2022-12-14 08:38:04,556 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_remove_harness_negated.i [2022-12-14 08:38:04,574 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:38:04,574 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:38:04,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:38:04,626 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=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d1cffee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:38:04,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:38:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 08:38:04,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 08:38:04,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:04,637 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:04,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:04,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash -102561370, now seen corresponding path program 1 times [2022-12-14 08:38:04,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:04,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813624718] [2022-12-14 08:38:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:04,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:04,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:04,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:04,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813624718] [2022-12-14 08:38:04,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813624718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:38:04,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:38:04,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:38:04,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020287844] [2022-12-14 08:38:04,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:05,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:38:05,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:05,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:38:05,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:38:05,032 INFO L87 Difference]: Start difference. First operand has 52 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 08:38:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:05,088 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2022-12-14 08:38:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:38:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2022-12-14 08:38:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:05,099 INFO L225 Difference]: With dead ends: 92 [2022-12-14 08:38:05,099 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 08:38:05,102 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:38:05,106 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:05,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 54 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:38:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 08:38:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 08:38:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 08:38:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-12-14 08:38:05,156 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 30 [2022-12-14 08:38:05,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:05,158 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-12-14 08:38:05,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 08:38:05,158 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-12-14 08:38:05,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 08:38:05,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:05,160 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:05,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:38:05,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1837047811, now seen corresponding path program 1 times [2022-12-14 08:38:05,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:05,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737612162] [2022-12-14 08:38:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:05,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:05,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:05,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737612162] [2022-12-14 08:38:05,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737612162] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:38:05,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:38:05,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:38:05,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92351067] [2022-12-14 08:38:05,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:05,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:38:05,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:05,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:38:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:38:05,561 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:38:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:05,642 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2022-12-14 08:38:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:38:05,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 35 [2022-12-14 08:38:05,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:05,644 INFO L225 Difference]: With dead ends: 86 [2022-12-14 08:38:05,644 INFO L226 Difference]: Without dead ends: 51 [2022-12-14 08:38:05,645 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:38:05,646 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:05,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:38:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-14 08:38:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-14 08:38:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 08:38:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-12-14 08:38:05,655 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 35 [2022-12-14 08:38:05,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:05,655 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-12-14 08:38:05,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 08:38:05,656 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-12-14 08:38:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 08:38:05,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:05,657 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:05,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:38:05,657 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:05,658 INFO L85 PathProgramCache]: Analyzing trace with hash -718796180, now seen corresponding path program 1 times [2022-12-14 08:38:05,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:05,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029172504] [2022-12-14 08:38:05,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:05,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:05,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:06,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:06,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029172504] [2022-12-14 08:38:06,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029172504] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518238747] [2022-12-14 08:38:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:06,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:06,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:06,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:06,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:38:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:38:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:06,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:38:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:38:06,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518238747] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:06,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:38:06,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 6] total 10 [2022-12-14 08:38:06,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902071484] [2022-12-14 08:38:06,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:06,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:38:06,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:38:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:38:06,350 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 08:38:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:06,416 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-12-14 08:38:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:38:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 36 [2022-12-14 08:38:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:06,419 INFO L225 Difference]: With dead ends: 82 [2022-12-14 08:38:06,419 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 08:38:06,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:38:06,420 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 3 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:06,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:38:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 08:38:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-12-14 08:38:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 08:38:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2022-12-14 08:38:06,428 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 36 [2022-12-14 08:38:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:06,428 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2022-12-14 08:38:06,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 08:38:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2022-12-14 08:38:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 08:38:06,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:06,429 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:06,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:38:06,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:06,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:06,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1082045479, now seen corresponding path program 1 times [2022-12-14 08:38:06,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:06,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588615050] [2022-12-14 08:38:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:06,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:38:07,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:07,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588615050] [2022-12-14 08:38:07,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588615050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:38:07,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:38:07,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 08:38:07,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850934045] [2022-12-14 08:38:07,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:38:07,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:38:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:38:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:38:07,070 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 08:38:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:07,192 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-12-14 08:38:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:38:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 37 [2022-12-14 08:38:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:07,193 INFO L225 Difference]: With dead ends: 62 [2022-12-14 08:38:07,193 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 08:38:07,193 INFO L412 NwaCegarLoop]: 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 [2022-12-14 08:38:07,194 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:07,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 242 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:38:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 08:38:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-12-14 08:38:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-12-14 08:38:07,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-12-14 08:38:07,198 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 37 [2022-12-14 08:38:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:07,199 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-12-14 08:38:07,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 08:38:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-12-14 08:38:07,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 08:38:07,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:07,199 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:07,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 08:38:07,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash -40821254, now seen corresponding path program 1 times [2022-12-14 08:38:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:07,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880415674] [2022-12-14 08:38:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:07,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:38:07,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:07,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880415674] [2022-12-14 08:38:07,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880415674] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:07,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775315110] [2022-12-14 08:38:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:07,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:07,507 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:07,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:38:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:07,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:38:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:07,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:38:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 08:38:07,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775315110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:38:07,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119841835] [2022-12-14 08:38:07,957 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 08:38:07,957 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:38:07,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:38:07,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:38:07,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:38:08,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,162 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 08:38:08,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 65 treesize of output 113 [2022-12-14 08:38:08,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 37 [2022-12-14 08:38:08,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-12-14 08:38:08,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-12-14 08:38:08,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 9 [2022-12-14 08:38:08,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 24 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2022-12-14 08:38:08,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 91 [2022-12-14 08:38:08,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:08,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 91 [2022-12-14 08:38:08,418 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_remove with input of size 169 for LOIs [2022-12-14 08:38:09,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:09,419 INFO L321 Elim1Store]: treesize reduction 327, result has 24.8 percent of original size [2022-12-14 08:38:09,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 726 treesize of output 493 [2022-12-14 08:38:09,514 INFO L321 Elim1Store]: treesize reduction 137, result has 38.8 percent of original size [2022-12-14 08:38:09,514 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 167 treesize of output 87 [2022-12-14 08:38:09,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:09,733 INFO L321 Elim1Store]: treesize reduction 387, result has 27.1 percent of original size [2022-12-14 08:38:09,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 600 treesize of output 566 [2022-12-14 08:38:09,808 INFO L321 Elim1Store]: treesize reduction 97, result has 45.5 percent of original size [2022-12-14 08:38:09,808 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 139 treesize of output 81 [2022-12-14 08:38:09,893 INFO L321 Elim1Store]: treesize reduction 123, result has 11.5 percent of original size [2022-12-14 08:38:09,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 797 treesize of output 606 [2022-12-14 08:38:09,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:09,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 76 [2022-12-14 08:38:09,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:09,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:38:09,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 551 treesize of output 447 [2022-12-14 08:38:10,006 INFO L321 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2022-12-14 08:38:10,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 195 treesize of output 134 [2022-12-14 08:38:10,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 55 [2022-12-14 08:38:10,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:10,062 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:38:10,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 170 treesize of output 183 [2022-12-14 08:38:11,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:38:11,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:38:11,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:38:11,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:38:11,518 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 08:38:11,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2022-12-14 08:38:11,542 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:38:11,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 50 [2022-12-14 08:38:11,564 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:38:11,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-12-14 08:38:11,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:11,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:11,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:11,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:11,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:38:11,811 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 22 for LOIs [2022-12-14 08:38:11,818 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-12-14 08:38:11,820 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 40 for LOIs [2022-12-14 08:38:11,888 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 160 for LOIs [2022-12-14 08:38:12,027 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 54 for LOIs [2022-12-14 08:38:12,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:12,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:12,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:38:12,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:12,146 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 18 for LOIs [2022-12-14 08:38:12,188 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:38:15,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1329#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 08:38:15,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:38:15,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:38:15,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 13 [2022-12-14 08:38:15,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454910831] [2022-12-14 08:38:15,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:38:15,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 08:38:15,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:15,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 08:38:15,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 08:38:15,398 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 08:38:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:15,651 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2022-12-14 08:38:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 08:38:15,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 38 [2022-12-14 08:38:15,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:15,653 INFO L225 Difference]: With dead ends: 119 [2022-12-14 08:38:15,653 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 08:38:15,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 08:38:15,654 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 25 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:15,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 355 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:38:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 08:38:15,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-12-14 08:38:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 18 states have call successors, (18), 8 states have call predecessors, (18), 9 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-12-14 08:38:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-12-14 08:38:15,659 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 38 [2022-12-14 08:38:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:15,660 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-12-14 08:38:15,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 08:38:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-12-14 08:38:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 08:38:15,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:15,661 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 08:38:15,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:38:15,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:15,862 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash 987020639, now seen corresponding path program 1 times [2022-12-14 08:38:15,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:15,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936153061] [2022-12-14 08:38:15,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:15,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:16,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936153061] [2022-12-14 08:38:16,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936153061] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718600086] [2022-12-14 08:38:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:16,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:16,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:16,142 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:16,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:38:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 08:38:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:16,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:38:16,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-14 08:38:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:16,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:38:17,106 INFO L350 Elim1Store]: Elim1 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 20 treesize of output 18 [2022-12-14 08:38:17,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-12-14 08:38:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:38:17,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718600086] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:38:17,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352547643] [2022-12-14 08:38:17,185 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2022-12-14 08:38:17,185 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:38:17,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:38:17,186 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:38:17,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:38:17,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:38:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:38:17,288 INFO L321 Elim1Store]: treesize reduction 84, result has 39.6 percent of original size [2022-12-14 08:38:17,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 113 [2022-12-14 08:38:17,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,451 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 08:38:17,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 65 treesize of output 113 [2022-12-14 08:38:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 26 [2022-12-14 08:38:17,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-12-14 08:38:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-12-14 08:38:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 26 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 91 [2022-12-14 08:38:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:17,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 24 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 48 [2022-12-14 08:38:17,734 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_remove with input of size 180 for LOIs [2022-12-14 08:38:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:19,001 INFO L321 Elim1Store]: treesize reduction 327, result has 24.8 percent of original size [2022-12-14 08:38:19,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 726 treesize of output 493 [2022-12-14 08:38:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:19,224 INFO L321 Elim1Store]: treesize reduction 247, result has 27.1 percent of original size [2022-12-14 08:38:19,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 995 treesize of output 645 [2022-12-14 08:38:19,244 INFO L350 Elim1Store]: Elim1 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 107 treesize of output 1 [2022-12-14 08:38:19,260 INFO L350 Elim1Store]: Elim1 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 107 treesize of output 1 [2022-12-14 08:38:19,274 INFO L350 Elim1Store]: Elim1 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 69 treesize of output 1 [2022-12-14 08:38:19,288 INFO L350 Elim1Store]: Elim1 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 69 treesize of output 1 [2022-12-14 08:38:19,376 INFO L321 Elim1Store]: treesize reduction 306, result has 7.8 percent of original size [2022-12-14 08:38:19,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 987 treesize of output 602 [2022-12-14 08:38:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:19,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2022-12-14 08:38:19,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:19,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:38:19,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 600 treesize of output 492 [2022-12-14 08:38:19,986 INFO L321 Elim1Store]: treesize reduction 76, result has 9.5 percent of original size [2022-12-14 08:38:19,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 265 treesize of output 208 [2022-12-14 08:38:19,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 79 [2022-12-14 08:38:20,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:20,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:38:20,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 244 treesize of output 233 [2022-12-14 08:38:21,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 08:38:21,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:38:21,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:38:21,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 08:38:21,223 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:38:21,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2022-12-14 08:38:21,244 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 08:38:21,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-12-14 08:38:21,263 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:38:21,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 46 [2022-12-14 08:38:21,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:21,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:21,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:38:21,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:21,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:21,631 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2022-12-14 08:38:21,639 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-12-14 08:38:21,641 INFO L197 IcfgInterpreter]: Interpreting procedure aws_is_mem_zeroed with input of size 40 for LOIs [2022-12-14 08:38:21,655 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_prev_is_valid with input of size 170 for LOIs [2022-12-14 08:38:21,825 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 54 for LOIs [2022-12-14 08:38:21,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:21,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:21,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-14 08:38:21,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 08:38:21,915 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 18 for LOIs [2022-12-14 08:38:21,960 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:38:26,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1917#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-12-14 08:38:26,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:38:26,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:38:26,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 11] total 27 [2022-12-14 08:38:26,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405288477] [2022-12-14 08:38:26,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:38:26,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 08:38:26,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:38:26,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 08:38:26,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2980, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 08:38:26,664 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 27 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 7 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-14 08:38:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:38:27,701 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2022-12-14 08:38:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 08:38:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 7 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 44 [2022-12-14 08:38:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:38:27,703 INFO L225 Difference]: With dead ends: 123 [2022-12-14 08:38:27,703 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 08:38:27,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=271, Invalid=4019, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 08:38:27,704 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:38:27,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 358 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 08:38:27,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 08:38:27,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-12-14 08:38:27,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 18 states have call successors, (18), 10 states have call predecessors, (18), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-12-14 08:38:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2022-12-14 08:38:27,710 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 44 [2022-12-14 08:38:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:38:27,710 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2022-12-14 08:38:27,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 7 states have call successors, (21), 5 states have call predecessors, (21), 8 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-12-14 08:38:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2022-12-14 08:38:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 08:38:27,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:38:27,711 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:38:27,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 08:38:27,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:27,913 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:38:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:38:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1488707132, now seen corresponding path program 2 times [2022-12-14 08:38:27,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:38:27,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331682043] [2022-12-14 08:38:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:38:27,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:38:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:38:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:38:28,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:38:28,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331682043] [2022-12-14 08:38:28,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331682043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:38:28,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59982945] [2022-12-14 08:38:28,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:38:28,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:38:28,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:38:28,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:38:28,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f75c0e8d-683a-4387-8b58-7cfa03ef7dff/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:38:29,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:38:29,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:38:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 08:38:29,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:38:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:38:29,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:38:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 08:38:29,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59982945] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:38:29,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216206678] [2022-12-14 08:38:29,565 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 08:38:29,565 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:38:29,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:38:29,566 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:38:29,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:38:29,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:38:29,617 INFO L321 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2022-12-14 08:38:29,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 41 [2022-12-14 08:38:29,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-12-14 08:38:29,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,742 INFO L321 Elim1Store]: treesize reduction 161, result has 25.8 percent of original size [2022-12-14 08:38:29,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 78 [2022-12-14 08:38:29,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:38:29,798 INFO L321 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-12-14 08:38:29,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 34 [2022-12-14 08:38:29,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:38:29,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:38:29,888 INFO L321 Elim1Store]: treesize reduction 92, result has 33.8 percent of original size [2022-12-14 08:38:29,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 105 [2022-12-14 08:38:29,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:29,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:38:29,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:38:29,970 INFO L321 Elim1Store]: treesize reduction 84, result has 39.6 percent of original size [2022-12-14 08:38:29,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 113 [2022-12-14 08:38:29,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:30,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:30,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:30,120 INFO L321 Elim1Store]: treesize reduction 251, result has 19.8 percent of original size [2022-12-14 08:38:30,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 16 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 65 treesize of output 113 [2022-12-14 08:38:30,152 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_remove with input of size 37 for LOIs [2022-12-14 08:38:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:30,633 INFO L321 Elim1Store]: treesize reduction 327, result has 24.8 percent of original size [2022-12-14 08:38:30,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 726 treesize of output 493 [2022-12-14 08:38:30,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:38:30,832 INFO L321 Elim1Store]: treesize reduction 299, result has 25.8 percent of original size [2022-12-14 08:38:30,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 505 treesize of output 447 [2022-12-14 08:38:30,897 INFO L321 Elim1Store]: treesize reduction 97, result has 45.5 percent of original size [2022-12-14 08:38:30,897 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 139 treesize of output 81 [2022-12-14 08:38:30,950 INFO L321 Elim1Store]: treesize reduction 97, result has 45.5 percent of original size [2022-12-14 08:38:30,950 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 139 treesize of output 81