./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur --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 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 --- 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-38b53e6 [2022-11-26 01:02:05,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:02:05,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:02:05,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:02:05,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:02:05,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:02:05,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:02:05,568 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:02:05,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:02:05,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:02:05,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:02:05,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:02:05,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:02:05,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:02:05,588 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:02:05,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:02:05,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:02:05,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:02:05,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:02:05,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:02:05,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:02:05,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:02:05,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:02:05,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:02:05,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:02:05,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:02:05,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:02:05,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:02:05,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:02:05,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:02:05,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:02:05,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:02:05,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:02:05,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:02:05,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:02:05,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:02:05,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:02:05,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:02:05,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:02:05,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:02:05,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:02:05,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 01:02:05,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:02:05,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:02:05,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:02:05,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:02:05,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:02:05,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:02:05,663 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:02:05,664 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:02:05,664 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:02:05,664 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:02:05,665 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:02:05,665 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:02:05,665 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:02:05,666 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:02:05,666 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:02:05,666 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:02:05,667 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:02:05,667 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:02:05,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:02:05,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:02:05,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:02:05,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:02:05,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:02:05,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:02:05,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:02:05,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:02:05,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:02:05,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:02:05,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:02:05,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:02:05,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:02:05,672 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:02:05,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:02:05,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:02:05,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:02:05,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:02:05,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:02:05,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:02:05,674 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_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bef4637cc296c755ba815d09f028f51f0bde7e0d2e6155f2b5c648b5201a193 [2022-11-26 01:02:05,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:02:05,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:02:05,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:02:05,987 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:02:05,988 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:02:05,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-11-26 01:02:09,170 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:02:09,653 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:02:09,653 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i [2022-11-26 01:02:09,694 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/data/276063b7f/ce84831399a94015af78e7c409a9dd7b/FLAG889673f16 [2022-11-26 01:02:09,714 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/data/276063b7f/ce84831399a94015af78e7c409a9dd7b [2022-11-26 01:02:09,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:02:09,722 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:02:09,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:02:09,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:02:09,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:02:09,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:02:09" (1/1) ... [2022-11-26 01:02:09,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3473e048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:09, skipping insertion in model container [2022-11-26 01:02:09,733 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:02:09" (1/1) ... [2022-11-26 01:02:09,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:02:09,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:02:10,146 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_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-11-26 01:02:10,157 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_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-11-26 01:02:11,051 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 01:02:11,058 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,059 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,060 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,061 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,062 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,077 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,078 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,080 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,081 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,083 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,084 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,085 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,086 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,157 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:02:11,158 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:02:11,159 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:02:11,164 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 01:02:11,167 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 01:02:11,168 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 01:02:11,451 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 01:02:11,452 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 01:02:11,454 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 01:02:11,455 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 01:02:11,456 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 01:02:11,458 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 01:02:11,459 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 01:02:11,460 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 01:02:11,461 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 01:02:11,461 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 01:02:11,462 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 01:02:11,616 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 01:02:11,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:02:11,662 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:02:11,678 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_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4496,4509] [2022-11-26 01:02:11,679 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_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/sv-benchmarks/c/aws-c-common/aws_linked_list_rbegin_harness.i[4556,4569] [2022-11-26 01:02:11,748 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 01:02:11,753 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,754 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,754 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,755 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,756 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,779 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,779 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,780 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,781 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,782 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,783 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,783 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,784 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:02:11,792 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:02:11,792 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:02:11,793 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:02:11,797 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 01:02:11,799 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 01:02:11,799 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 01:02:11,825 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 01:02:11,826 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 01:02:11,831 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 01:02:11,832 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 01:02:11,834 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 01:02:11,835 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 01:02:11,841 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 01:02:11,842 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 01:02:11,843 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 01:02:11,844 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 01:02:11,845 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 01:02:11,896 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 01:02:11,931 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:02:12,186 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:02:12,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12 WrapperNode [2022-11-26 01:02:12,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:02:12,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:02:12,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:02:12,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:02:12,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,325 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 141 [2022-11-26 01:02:12,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:02:12,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:02:12,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:02:12,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:02:12,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,385 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:02:12,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:02:12,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:02:12,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:02:12,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (1/1) ... [2022-11-26 01:02:12,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:02:12,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:12,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:02:12,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:02:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:02:12,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 01:02:12,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 01:02:12,482 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-26 01:02:12,482 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-26 01:02:12,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 01:02:12,482 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-26 01:02:12,482 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-26 01:02:12,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:02:12,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 01:02:12,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:02:12,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:02:12,483 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 01:02:12,484 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 01:02:12,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:02:12,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 01:02:12,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 01:02:12,484 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-26 01:02:12,485 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-26 01:02:12,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:02:12,778 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:02:12,780 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:02:13,136 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:02:13,324 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:02:13,324 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 01:02:13,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:02:13 BoogieIcfgContainer [2022-11-26 01:02:13,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:02:13,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:02:13,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:02:13,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:02:13,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:02:09" (1/3) ... [2022-11-26 01:02:13,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327070b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:02:13, skipping insertion in model container [2022-11-26 01:02:13,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:02:12" (2/3) ... [2022-11-26 01:02:13,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327070b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:02:13, skipping insertion in model container [2022-11-26 01:02:13,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:02:13" (3/3) ... [2022-11-26 01:02:13,343 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rbegin_harness.i [2022-11-26 01:02:13,363 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:02:13,363 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:02:13,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:02:13,434 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;@49cfc947, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:02:13,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:02:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-26 01:02:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 01:02:13,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:13,447 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 01:02:13,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:13,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2063254078, now seen corresponding path program 1 times [2022-11-26 01:02:13,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:13,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359421223] [2022-11-26 01:02:13,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:13,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:02:14,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359421223] [2022-11-26 01:02:14,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359421223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:14,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607733967] [2022-11-26 01:02:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:14,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:14,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:14,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:02:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:14,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-26 01:02:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:14,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:02:14,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:02:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-26 01:02:14,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:14,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-26 01:02:16,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:02:16,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:16,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607733967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:16,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:16,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2022-11-26 01:02:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255731671] [2022-11-26 01:02:16,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:16,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:02:16,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:02:16,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:02:16,691 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-26 01:02:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:17,440 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-11-26 01:02:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:02:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2022-11-26 01:02:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:17,452 INFO L225 Difference]: With dead ends: 124 [2022-11-26 01:02:17,452 INFO L226 Difference]: Without dead ends: 83 [2022-11-26 01:02:17,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:02:17,459 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:17,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 162 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 01:02:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-26 01:02:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-11-26 01:02:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 49 states have internal predecessors, (60), 24 states have call successors, (24), 9 states have call predecessors, (24), 10 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-26 01:02:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2022-11-26 01:02:17,526 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 37 [2022-11-26 01:02:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:17,527 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2022-11-26 01:02:17,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-26 01:02:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2022-11-26 01:02:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 01:02:17,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:17,533 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 01:02:17,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:17,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 01:02:17,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:17,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1943617686, now seen corresponding path program 1 times [2022-11-26 01:02:17,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:17,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439232759] [2022-11-26 01:02:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:17,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:02:18,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:18,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439232759] [2022-11-26 01:02:18,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439232759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:18,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311264601] [2022-11-26 01:02:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:18,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:18,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:02:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-26 01:02:18,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:18,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:02:18,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:02:18,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-26 01:02:18,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 01:02:18,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-26 01:02:18,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 01:02:18,703 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 01:02:18,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 127 treesize of output 141 [2022-11-26 01:02:18,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 125 [2022-11-26 01:02:18,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2022-11-26 01:02:18,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2022-11-26 01:02:18,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-26 01:02:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:18,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-11-26 01:02:18,795 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 11 treesize of output 7 [2022-11-26 01:02:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:02:21,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:02:26,839 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| 0))) (.cse2 (+ 16 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|)) (.cse1 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse7 (+ 8 |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (not (< |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse2) 0)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))) (or (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store (store .cse3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset|) 0))) (not (< |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| |c_#StackHeapBarrier|)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (let ((.cse6 (+ |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= 0 (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store (store .cse5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse5 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse6)))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse6) 0))) (not (< |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| |c_#StackHeapBarrier|)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0)))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse7) 0)) (not (< |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| |c_#StackHeapBarrier|)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= 0 (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store (store .cse8 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse8 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse2))) (not (< |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| |c_#StackHeapBarrier|)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))) (forall ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| Int)) (or (not (< |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|)))) (store (store .cse9 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store .cse9 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse1 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17|))) |c_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base|) .cse7) 0)) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_17| 0))))) is different from false [2022-11-26 01:02:26,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:02:26,930 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-26 01:02:26,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:02:26,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 142 [2022-11-26 01:02:26,954 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 136 treesize of output 128 [2022-11-26 01:02:26,967 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 63 treesize of output 59 [2022-11-26 01:02:27,054 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 7 treesize of output 3 [2022-11-26 01:02:27,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:02:27,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 73 [2022-11-26 01:02:27,211 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:02:27,211 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-26 01:02:27,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,219 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 87 treesize of output 69 [2022-11-26 01:02:27,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:27,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:27,250 INFO L321 Elim1Store]: treesize reduction 5, result has 73.7 percent of original size [2022-11-26 01:02:27,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 53 [2022-11-26 01:02:27,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:27,267 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 11 treesize of output 7 [2022-11-26 01:02:27,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:27,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:27,286 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-26 01:02:27,287 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-26 01:02:27,295 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 01:02:27,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:27,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:27,312 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-26 01:02:27,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 1 [2022-11-26 01:02:27,321 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 01:02:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-26 01:02:27,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311264601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:02:27,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086489842] [2022-11-26 01:02:27,451 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 01:02:27,451 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:02:27,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:02:27,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:02:27,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:02:27,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,582 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:02:27,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:02:27,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:02:27,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:02:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:02:27,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:02:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:27,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:02:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,146 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:02:28,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:02:28,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,181 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 50 treesize of output 28 [2022-11-26 01:02:28,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 01:02:28,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-11-26 01:02:28,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:02:28,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:28,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:02:28,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:28,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:28,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:28,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:28,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:28,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:28,957 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 01:02:28,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-26 01:02:29,539 INFO L321 Elim1Store]: treesize reduction 192, result has 23.5 percent of original size [2022-11-26 01:02:29,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 684 [2022-11-26 01:02:29,767 INFO L321 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2022-11-26 01:02:29,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 643 treesize of output 654 [2022-11-26 01:02:29,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:29,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:29,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:29,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:29,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:29,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:29,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:29,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:29,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:29,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:29,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:30,163 INFO L321 Elim1Store]: treesize reduction 233, result has 25.6 percent of original size [2022-11-26 01:02:30,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 19 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 688 treesize of output 691 [2022-11-26 01:02:30,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:30,254 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 01:02:30,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-11-26 01:02:30,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-26 01:02:32,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:02:32,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:02:32,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:02:32,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:02:32,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 01:02:32,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:32,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 01:02:32,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:02:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:02:32,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:02:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:02:32,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:32,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:02:33,164 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-26 01:02:33,368 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 136 for LOIs [2022-11-26 01:02:33,418 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:02:33,442 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:02:36,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2086489842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:36,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:02:36,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2022-11-26 01:02:36,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655483824] [2022-11-26 01:02:36,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:36,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 01:02:36,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:36,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 01:02:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=833, Unknown=1, NotChecked=58, Total=992 [2022-11-26 01:02:36,818 INFO L87 Difference]: Start difference. First operand 81 states and 108 transitions. Second operand has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 01:02:38,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:38,914 INFO L93 Difference]: Finished difference Result 145 states and 191 transitions. [2022-11-26 01:02:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 01:02:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 38 [2022-11-26 01:02:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:38,917 INFO L225 Difference]: With dead ends: 145 [2022-11-26 01:02:38,917 INFO L226 Difference]: Without dead ends: 107 [2022-11-26 01:02:38,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=121, Invalid=1004, Unknown=1, NotChecked=64, Total=1190 [2022-11-26 01:02:38,920 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:38,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 180 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 01:02:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-26 01:02:38,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-11-26 01:02:38,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.353846153846154) internal successors, (88), 68 states have internal predecessors, (88), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-26 01:02:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 139 transitions. [2022-11-26 01:02:38,958 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 139 transitions. Word has length 38 [2022-11-26 01:02:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:38,958 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 139 transitions. [2022-11-26 01:02:38,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 01:02:38,959 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 139 transitions. [2022-11-26 01:02:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-26 01:02:38,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:38,961 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-26 01:02:38,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:39,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:39,163 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:39,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1859140634, now seen corresponding path program 1 times [2022-11-26 01:02:39,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:39,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22699173] [2022-11-26 01:02:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:39,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:02:39,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:39,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22699173] [2022-11-26 01:02:39,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22699173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:39,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671726242] [2022-11-26 01:02:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:39,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:39,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:39,343 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:39,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:02:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:39,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 01:02:39,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:39,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:02:39,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:39,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671726242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:39,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:39,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-26 01:02:39,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432520587] [2022-11-26 01:02:39,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:39,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:02:39,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:39,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:02:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:02:39,592 INFO L87 Difference]: Start difference. First operand 105 states and 139 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:02:39,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:39,775 INFO L93 Difference]: Finished difference Result 213 states and 283 transitions. [2022-11-26 01:02:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:02:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 39 [2022-11-26 01:02:39,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:39,778 INFO L225 Difference]: With dead ends: 213 [2022-11-26 01:02:39,778 INFO L226 Difference]: Without dead ends: 115 [2022-11-26 01:02:39,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:02:39,780 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:39,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 152 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:02:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-26 01:02:39,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-11-26 01:02:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.323076923076923) internal successors, (86), 68 states have internal predecessors, (86), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-26 01:02:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2022-11-26 01:02:39,820 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 39 [2022-11-26 01:02:39,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:39,820 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2022-11-26 01:02:39,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:02:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2022-11-26 01:02:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 01:02:39,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:39,823 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-26 01:02:39,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:40,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:40,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2129804384, now seen corresponding path program 1 times [2022-11-26 01:02:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:40,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436616717] [2022-11-26 01:02:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:02:40,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:40,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436616717] [2022-11-26 01:02:40,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436616717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:40,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291075962] [2022-11-26 01:02:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:40,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:40,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:40,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:40,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:02:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:40,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:02:40,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:02:40,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:40,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291075962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:40,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:40,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-26 01:02:40,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641253883] [2022-11-26 01:02:40,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:40,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:02:40,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:40,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:02:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:02:40,584 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:02:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:40,876 INFO L93 Difference]: Finished difference Result 255 states and 343 transitions. [2022-11-26 01:02:40,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:02:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2022-11-26 01:02:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:40,887 INFO L225 Difference]: With dead ends: 255 [2022-11-26 01:02:40,887 INFO L226 Difference]: Without dead ends: 155 [2022-11-26 01:02:40,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:02:40,894 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:40,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 177 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:02:40,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-26 01:02:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 107. [2022-11-26 01:02:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.3134328358208955) internal successors, (88), 70 states have internal predecessors, (88), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-26 01:02:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2022-11-26 01:02:40,942 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 41 [2022-11-26 01:02:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:40,942 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2022-11-26 01:02:40,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:02:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2022-11-26 01:02:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 01:02:40,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:40,944 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-26 01:02:40,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:41,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:41,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:41,151 INFO L85 PathProgramCache]: Analyzing trace with hash -647115340, now seen corresponding path program 1 times [2022-11-26 01:02:41,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:41,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88182637] [2022-11-26 01:02:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:41,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:02:41,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:41,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88182637] [2022-11-26 01:02:41,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88182637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:41,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544014127] [2022-11-26 01:02:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:41,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:41,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:41,410 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:41,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:02:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:41,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:02:41,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:02:41,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:02:41,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544014127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:02:41,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:02:41,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-26 01:02:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820914764] [2022-11-26 01:02:41,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:02:41,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:02:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:02:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:02:41,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:02:41,625 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:02:41,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:02:41,725 INFO L93 Difference]: Finished difference Result 229 states and 315 transitions. [2022-11-26 01:02:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:02:41,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-11-26 01:02:41,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:02:41,729 INFO L225 Difference]: With dead ends: 229 [2022-11-26 01:02:41,729 INFO L226 Difference]: Without dead ends: 135 [2022-11-26 01:02:41,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:02:41,730 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:02:41,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 94 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:02:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-26 01:02:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2022-11-26 01:02:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 76 states have internal predecessors, (96), 26 states have call successors, (26), 12 states have call predecessors, (26), 13 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-11-26 01:02:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 147 transitions. [2022-11-26 01:02:41,788 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 147 transitions. Word has length 42 [2022-11-26 01:02:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:02:41,788 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 147 transitions. [2022-11-26 01:02:41,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 01:02:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 147 transitions. [2022-11-26 01:02:41,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-26 01:02:41,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:02:41,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-26 01:02:41,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:02:42,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:42,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:02:42,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:02:42,004 INFO L85 PathProgramCache]: Analyzing trace with hash 625474841, now seen corresponding path program 1 times [2022-11-26 01:02:42,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:02:42,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265566571] [2022-11-26 01:02:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:42,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:02:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:02:42,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:02:42,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265566571] [2022-11-26 01:02:42,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265566571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:02:42,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096130643] [2022-11-26 01:02:42,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:02:42,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:02:42,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:02:42,327 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:02:42,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:02:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:02:42,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-26 01:02:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:02:42,670 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-26 01:02:42,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-26 01:02:42,693 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:02:42,694 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 9 treesize of output 15 [2022-11-26 01:02:42,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-11-26 01:02:42,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 [2022-11-26 01:02:42,776 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 48 treesize of output 28 [2022-11-26 01:02:42,781 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 21 treesize of output 13 [2022-11-26 01:02:56,125 WARN L233 SmtUtils]: Spent 11.67s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:02:58,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:58,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:58,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:58,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:58,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:58,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:58,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:58,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:58,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:58,987 INFO L321 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-11-26 01:02:58,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 6 disjoint index pairs (out of 105 index pairs), introduced 11 new quantified variables, introduced 77 case distinctions, treesize of input 209 treesize of output 143 [2022-11-26 01:02:58,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:59,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:59,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:59,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:59,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:59,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:02:59,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:59,017 INFO L321 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2022-11-26 01:02:59,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 6 disjoint index pairs (out of 66 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 140 treesize of output 86 [2022-11-26 01:02:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:02:59,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:03,303 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:03:03,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096130643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:03,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1095865991] [2022-11-26 01:03:03,307 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-26 01:03:03,307 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:03,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:03,308 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:03,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:03,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,389 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:03:03,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:03:03,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:03:03,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:03:03,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:03:03,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:03:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:03:03,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:03:03,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-26 01:03:03,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-26 01:03:03,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:03,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:03:04,641 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 132 for LOIs [2022-11-26 01:03:05,210 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-26 01:03:05,273 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:03:05,296 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 23 for LOIs [2022-11-26 01:03:05,367 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:12,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1095865991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:12,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:12,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 14, 8] total 42 [2022-11-26 01:03:12,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099990826] [2022-11-26 01:03:12,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:12,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:03:12,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:03:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1523, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 01:03:12,311 INFO L87 Difference]: Start difference. First operand 113 states and 147 transitions. Second operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 01:03:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:16,911 INFO L93 Difference]: Finished difference Result 175 states and 224 transitions. [2022-11-26 01:03:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 01:03:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2022-11-26 01:03:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:16,913 INFO L225 Difference]: With dead ends: 175 [2022-11-26 01:03:16,914 INFO L226 Difference]: Without dead ends: 123 [2022-11-26 01:03:16,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=256, Invalid=1906, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 01:03:16,915 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 44 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:16,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 453 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-26 01:03:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-26 01:03:16,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-11-26 01:03:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 81 states have internal predecessors, (101), 27 states have call successors, (27), 13 states have call predecessors, (27), 15 states have return successors, (27), 25 states have call predecessors, (27), 25 states have call successors, (27) [2022-11-26 01:03:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 155 transitions. [2022-11-26 01:03:16,990 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 155 transitions. Word has length 45 [2022-11-26 01:03:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:16,990 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 155 transitions. [2022-11-26 01:03:16,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.3125) internal successors, (21), 13 states have internal predecessors, (21), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 01:03:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 155 transitions. [2022-11-26 01:03:16,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 01:03:16,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:16,992 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-26 01:03:16,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:17,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:17,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:17,198 INFO L85 PathProgramCache]: Analyzing trace with hash 105816945, now seen corresponding path program 1 times [2022-11-26 01:03:17,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:17,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878759287] [2022-11-26 01:03:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:17,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:03:17,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878759287] [2022-11-26 01:03:17,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878759287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:17,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105832960] [2022-11-26 01:03:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:17,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:17,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:17,467 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:17,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:03:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-26 01:03:17,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:17,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 01:03:17,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:17,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:03:17,914 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 01:03:17,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 115 [2022-11-26 01:03:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:17,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-11-26 01:03:17,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:17,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 01:03:17,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-26 01:03:18,038 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_16 (Array Int Int)) (v_DerPreprocessor_17 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50| Int)) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50|))) (let ((.cse1 (select .cse0 0))) (and (= (select .cse0 24) .cse1) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_16) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50| v_DerPreprocessor_17) .cse1 v_DerPreprocessor_16) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50| v_DerPreprocessor_17) .cse1) (select |c_#memory_$Pointer$.base| .cse1)) (<= (+ .cse1 2) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50|) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50|) (not (= .cse1 0)) (= .cse1 (select v_DerPreprocessor_17 24)))))) is different from true [2022-11-26 01:03:21,668 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_16 (Array Int Int)) (v_DerPreprocessor_17 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50| Int)) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50|))) (let ((.cse1 (select .cse0 0))) (and (= (select .cse0 24) .cse1) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse1 v_DerPreprocessor_16) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50| v_DerPreprocessor_17) .cse1 v_DerPreprocessor_16) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50| v_DerPreprocessor_17) .cse1) (select |c_#memory_$Pointer$.base| .cse1)) (<= (+ .cse1 2) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50|) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_50|) (not (= .cse1 0)) (= .cse1 (select v_DerPreprocessor_17 24)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_9| Int) (v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int))) (let ((.cse4 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_9|))) (let ((.cse2 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_9|)) (.cse3 (select .cse4 0))) (and (= (select .cse2 16) 0) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_9|) (<= (+ .cse3 2) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_9|) (= .cse3 (select v_DerPreprocessor_20 24)) (not (= .cse3 0)) (= .cse3 (select .cse4 24)) (= (select .cse2 8) 0) (= (select .cse4 8) 0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse3 v_DerPreprocessor_21) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_9| v_DerPreprocessor_20) .cse3 v_DerPreprocessor_21) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_9| v_DerPreprocessor_20) .cse3) (select |c_#memory_$Pointer$.base| .cse3)) (= (select .cse4 16) 0))))) (exists ((v_DerPreprocessor_19 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_51| Int)) (let ((.cse6 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_51|))) (let ((.cse5 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_51|)) (.cse7 (select .cse6 0))) (and (= (select .cse5 16) 0) (= (select .cse6 8) 0) (not (= .cse7 0)) (= (select .cse6 16) 0) (<= (+ .cse7 2) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_51|) (<= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_51|) (= (select .cse5 8) 0) (= .cse7 (select v_DerPreprocessor_19 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse7 v_DerPreprocessor_18) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_19) .cse7 v_DerPreprocessor_18) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_19) .cse7) (select |c_#memory_$Pointer$.base| .cse7)) (= (select .cse6 24) .cse7))))) (let ((.cse12 (+ 16 |c_aws_linked_list_is_valid_#in~list#1.offset|)) (.cse9 (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 8)) (.cse8 (select |c_#memory_$Pointer$.base| |c_aws_linked_list_is_valid_#in~list#1.base|)) (.cse10 (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_is_valid_#in~list#1.base|))) (or (not (= (select .cse8 .cse9) 0)) (let ((.cse11 (+ |c_aws_linked_list_is_valid_#in~list#1.offset| 24))) (and (= (select .cse10 .cse11) 0) (= (select .cse8 .cse11) 0))) (not (= (select .cse8 .cse12) 0)) (not (= (select .cse10 .cse12) 0)) (not (= (select .cse10 .cse9) 0)) (and (= |c_aws_linked_list_is_valid_#in~list#1.offset| 0) (= |c_aws_linked_list_is_valid_#in~list#1.base| 0)) (and (= (select .cse8 |c_aws_linked_list_is_valid_#in~list#1.offset|) 0) (= (select .cse10 |c_aws_linked_list_is_valid_#in~list#1.offset|) 0))))) is different from true [2022-11-26 01:03:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-26 01:03:21,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:26,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 590 treesize of output 546 [2022-11-26 01:03:26,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 546 treesize of output 490 [2022-11-26 01:03:26,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 490 treesize of output 462 [2022-11-26 01:03:26,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:26,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 148 [2022-11-26 01:03:26,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:26,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1393 treesize of output 1181 [2022-11-26 01:03:26,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:26,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1301 treesize of output 1261 [2022-11-26 01:03:26,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:26,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1261 treesize of output 1241 [2022-11-26 01:03:26,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:26,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1293 treesize of output 1277 [2022-11-26 01:03:26,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:26,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1277 treesize of output 1269 [2022-11-26 01:03:26,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2022-11-26 01:03:26,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 203 [2022-11-26 01:03:27,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 49 [2022-11-26 01:03:27,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 109 [2022-11-26 01:03:27,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-26 01:03:27,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2022-11-26 01:03:27,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:03:27,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 314 treesize of output 280 [2022-11-26 01:03:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:03:28,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105832960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:28,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [140658211] [2022-11-26 01:03:28,548 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-26 01:03:28,548 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:28,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:28,549 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:28,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:28,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,635 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:03:28,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:03:28,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:03:28,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:03:28,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:03:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:28,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:03:28,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:03:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-11-26 01:03:29,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,127 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 01:03:29,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-26 01:03:29,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:29,194 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:03:29,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 01:03:29,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,299 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:03:29,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:03:29,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-11-26 01:03:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:29,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:03:29,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:03:29,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:03:29,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:03:29,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:29,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 01:03:29,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:03:29,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:03:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:03:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:03:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:03:29,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:29,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:03:30,578 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-26 01:03:31,015 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-26 01:03:31,057 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:03:31,075 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-26 01:03:31,148 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:37,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [140658211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:37,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:37,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 19, 12] total 52 [2022-11-26 01:03:37,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225628565] [2022-11-26 01:03:37,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:37,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:03:37,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:37,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:03:37,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2201, Unknown=79, NotChecked=194, Total=2652 [2022-11-26 01:03:37,555 INFO L87 Difference]: Start difference. First operand 120 states and 155 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 01:03:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:41,117 INFO L93 Difference]: Finished difference Result 181 states and 232 transitions. [2022-11-26 01:03:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 01:03:41,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 46 [2022-11-26 01:03:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:41,119 INFO L225 Difference]: With dead ends: 181 [2022-11-26 01:03:41,119 INFO L226 Difference]: Without dead ends: 127 [2022-11-26 01:03:41,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=231, Invalid=2772, Unknown=85, NotChecked=218, Total=3306 [2022-11-26 01:03:41,121 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 50 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:41,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 149 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 01:03:41,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-26 01:03:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-26 01:03:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.3125) internal successors, (105), 84 states have internal predecessors, (105), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-26 01:03:41,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 161 transitions. [2022-11-26 01:03:41,182 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 161 transitions. Word has length 46 [2022-11-26 01:03:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:41,182 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 161 transitions. [2022-11-26 01:03:41,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 13 states have internal predecessors, (22), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 01:03:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 161 transitions. [2022-11-26 01:03:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-26 01:03:41,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:41,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-26 01:03:41,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:41,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:41,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash 2023309535, now seen corresponding path program 1 times [2022-11-26 01:03:41,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:41,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31144431] [2022-11-26 01:03:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:41,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:03:42,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:42,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31144431] [2022-11-26 01:03:42,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31144431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:42,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937646196] [2022-11-26 01:03:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:42,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:42,231 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:42,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:03:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-26 01:03:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:03:45,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:03:45,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937646196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:45,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812591426] [2022-11-26 01:03:45,369 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:03:45,369 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:45,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:45,370 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:45,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:45,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,428 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 01:03:45,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-26 01:03:45,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,493 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:03:45,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:03:45,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:03:45,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:03:45,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:03:45,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:03:45,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:03:45,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-26 01:03:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-26 01:03:45,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:45,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:03:46,605 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 126 for LOIs [2022-11-26 01:03:47,590 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 170 for LOIs [2022-11-26 01:03:47,657 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:03:47,674 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:03:47,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:55,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1812591426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:03:55,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:55,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-26 01:03:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984190666] [2022-11-26 01:03:55,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:03:55,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 01:03:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:55,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 01:03:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 01:03:55,095 INFO L87 Difference]: Start difference. First operand 125 states and 161 transitions. Second operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 01:04:01,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:01,345 INFO L93 Difference]: Finished difference Result 194 states and 246 transitions. [2022-11-26 01:04:01,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 01:04:01,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-11-26 01:04:01,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:01,348 INFO L225 Difference]: With dead ends: 194 [2022-11-26 01:04:01,348 INFO L226 Difference]: Without dead ends: 135 [2022-11-26 01:04:01,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 01:04:01,349 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 100 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:01,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 299 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-26 01:04:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-26 01:04:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 126. [2022-11-26 01:04:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.308641975308642) internal successors, (106), 85 states have internal predecessors, (106), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-26 01:04:01,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 162 transitions. [2022-11-26 01:04:01,412 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 162 transitions. Word has length 47 [2022-11-26 01:04:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:01,413 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 162 transitions. [2022-11-26 01:04:01,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.4375) internal successors, (23), 14 states have internal predecessors, (23), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 01:04:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 162 transitions. [2022-11-26 01:04:01,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 01:04:01,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:01,414 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-26 01:04:01,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-26 01:04:01,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:01,621 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:01,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:01,621 INFO L85 PathProgramCache]: Analyzing trace with hash 848277815, now seen corresponding path program 1 times [2022-11-26 01:04:01,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:01,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312170805] [2022-11-26 01:04:01,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:01,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:04:02,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:02,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312170805] [2022-11-26 01:04:02,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312170805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:02,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680744039] [2022-11-26 01:04:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:02,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:02,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:02,484 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:02,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:04:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:02,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-26 01:04:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:04:05,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:04:05,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680744039] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:04:05,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504284624] [2022-11-26 01:04:05,555 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:04:05,556 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:04:05,556 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:04:05,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:04:05,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:04:05,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,619 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 01:04:05,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-26 01:04:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,680 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:04:05,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:04:05,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:04:05,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:04:05,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:04:05,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:05,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:04:06,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-11-26 01:04:06,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:04:06,064 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:04:06,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 01:04:06,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:04:06,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,170 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 01:04:06,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-26 01:04:06,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:04:06,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:04:06,232 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:04:06,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 01:04:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,337 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:04:06,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:04:06,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:04:06,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:04:06,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:04:06,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-26 01:04:06,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-26 01:04:06,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-26 01:04:06,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:04:06,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:04:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:04:06,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:04:06,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:06,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:04:07,530 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-26 01:04:08,369 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 156 for LOIs [2022-11-26 01:04:08,411 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:04:08,427 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:04:08,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:04:14,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1504284624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:04:14,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:04:14,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 8, 6] total 37 [2022-11-26 01:04:14,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600016740] [2022-11-26 01:04:14,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:04:14,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 01:04:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 01:04:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 01:04:14,393 INFO L87 Difference]: Start difference. First operand 126 states and 162 transitions. Second operand has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 01:04:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:19,184 INFO L93 Difference]: Finished difference Result 200 states and 254 transitions. [2022-11-26 01:04:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 01:04:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-26 01:04:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:19,186 INFO L225 Difference]: With dead ends: 200 [2022-11-26 01:04:19,186 INFO L226 Difference]: Without dead ends: 141 [2022-11-26 01:04:19,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 01:04:19,187 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:19,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 163 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 01:04:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-26 01:04:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2022-11-26 01:04:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 86 states have internal predecessors, (107), 28 states have call successors, (28), 14 states have call predecessors, (28), 16 states have return successors, (28), 26 states have call predecessors, (28), 26 states have call successors, (28) [2022-11-26 01:04:19,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-11-26 01:04:19,249 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 48 [2022-11-26 01:04:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:19,249 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-11-26 01:04:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5) internal successors, (24), 14 states have internal predecessors, (24), 5 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-26 01:04:19,250 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-11-26 01:04:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 01:04:19,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:19,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-26 01:04:19,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:19,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 01:04:19,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:19,463 INFO L85 PathProgramCache]: Analyzing trace with hash -749602731, now seen corresponding path program 1 times [2022-11-26 01:04:19,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:19,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29252762] [2022-11-26 01:04:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:19,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 01:04:19,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:19,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29252762] [2022-11-26 01:04:19,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29252762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262359936] [2022-11-26 01:04:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:19,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:19,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:19,647 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:19,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:04:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:19,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-26 01:04:19,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:20,046 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-26 01:04:20,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-26 01:04:20,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-11-26 01:04:20,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 [2022-11-26 01:04:20,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 26 [2022-11-26 01:04:20,131 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 21 treesize of output 13 [2022-11-26 01:04:44,497 WARN L233 SmtUtils]: Spent 10.61s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:08,930 INFO L321 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-11-26 01:05:08,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 6 disjoint index pairs (out of 105 index pairs), introduced 12 new quantified variables, introduced 78 case distinctions, treesize of input 258 treesize of output 172 [2022-11-26 01:05:08,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:08,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:08,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:05:08,981 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-11-26 01:05:08,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 6 disjoint index pairs (out of 78 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 111 treesize of output 53 [2022-11-26 01:05:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:05:08,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:05:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 01:05:14,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262359936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:05:14,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [208609952] [2022-11-26 01:05:14,059 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:05:14,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:05:14,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:05:14,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:05:14,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:05:14,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,132 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:05:14,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:05:14,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:05:14,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:05:14,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:05:14,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:05:14,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:05:14,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:05:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:05:14,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-26 01:05:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:05:14,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-26 01:05:16,061 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-26 01:05:16,131 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 158 for LOIs [2022-11-26 01:05:17,718 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 01:05:17,719 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:05:17,734 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:05:17,795 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:50,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6453#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19| Int)) (and (= (select |#length| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 32) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 8) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24)) 0) 16) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) (= (select |#valid| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 1) (not (= 2 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 16) 0) (<= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) (not (= 3 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|)) (not (= 4 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24)) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) (not (= 0 |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_19|) 16) 0))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 33 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:05:50,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:50,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:05:50,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 19, 11] total 31 [2022-11-26 01:05:50,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933068872] [2022-11-26 01:05:50,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:50,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 01:05:50,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:50,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 01:05:50,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2877, Unknown=62, NotChecked=0, Total=3306 [2022-11-26 01:05:50,530 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 31 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 6 states have call predecessors, (21), 10 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-26 01:05:52,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:05:55,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:05:57,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:05:59,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:17,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:19,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:21,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:23,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:26,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:28,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:30,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:32,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:34,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:36,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:38,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:42,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:44,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:46,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:48,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:50,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:52,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:54,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:56,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:06:58,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:00,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:05,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:07,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:11,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:15,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:17,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:22,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:24,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:28,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:33,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:37,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:39,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:41,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:43,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:45,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:47,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:49,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:51,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:54,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:56,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:07:58,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:00,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:02,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:04,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:08,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:10,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:12,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:14,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:16,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:18,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:20,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:22,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:24,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:26,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:29,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:31,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:33,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:35,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:39,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:42,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:44,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:46,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:48,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:50,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:52,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:54,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:56,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:08:58,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:00,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:02,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:05,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:07,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:09,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:11,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:13,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:15,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:17,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:19,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:21,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:23,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:09:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:23,968 INFO L93 Difference]: Finished difference Result 407 states and 556 transitions. [2022-11-26 01:09:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-26 01:09:23,969 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 6 states have call predecessors, (21), 10 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) Word has length 48 [2022-11-26 01:09:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:23,972 INFO L225 Difference]: With dead ends: 407 [2022-11-26 01:09:23,972 INFO L226 Difference]: Without dead ends: 290 [2022-11-26 01:09:23,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 117.2s TimeCoverageRelationStatistics Valid=645, Invalid=5722, Unknown=113, NotChecked=0, Total=6480 [2022-11-26 01:09:23,975 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 153 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 139 mSolverCounterUnsat, 260 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 174.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 260 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 174.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:23,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 699 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1244 Invalid, 260 Unknown, 0 Unchecked, 174.9s Time] [2022-11-26 01:09:23,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-26 01:09:24,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 232. [2022-11-26 01:09:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 156 states have (on average 1.314102564102564) internal successors, (205), 167 states have internal predecessors, (205), 46 states have call successors, (46), 20 states have call predecessors, (46), 29 states have return successors, (65), 44 states have call predecessors, (65), 44 states have call successors, (65) [2022-11-26 01:09:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 316 transitions. [2022-11-26 01:09:24,109 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 316 transitions. Word has length 48 [2022-11-26 01:09:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:24,110 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 316 transitions. [2022-11-26 01:09:24,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.64) internal successors, (66), 25 states have internal predecessors, (66), 11 states have call successors, (21), 6 states have call predecessors, (21), 10 states have return successors, (21), 9 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-26 01:09:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 316 transitions. [2022-11-26 01:09:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-26 01:09:24,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:24,112 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:24,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:24,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:24,319 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash 376968697, now seen corresponding path program 1 times [2022-11-26 01:09:24,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:24,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582595297] [2022-11-26 01:09:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:24,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:24,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:24,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582595297] [2022-11-26 01:09:24,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582595297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:24,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413736190] [2022-11-26 01:09:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:24,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:24,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:24,674 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:24,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:09:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:24,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:09:24,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:09:25,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:25,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413736190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:25,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:25,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2022-11-26 01:09:25,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341960369] [2022-11-26 01:09:25,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:25,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:09:25,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:09:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:09:25,050 INFO L87 Difference]: Start difference. First operand 232 states and 316 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 01:09:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:25,360 INFO L93 Difference]: Finished difference Result 412 states and 553 transitions. [2022-11-26 01:09:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:09:25,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-11-26 01:09:25,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:25,363 INFO L225 Difference]: With dead ends: 412 [2022-11-26 01:09:25,363 INFO L226 Difference]: Without dead ends: 232 [2022-11-26 01:09:25,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-26 01:09:25,365 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:25,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 176 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:09:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-26 01:09:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-11-26 01:09:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 156 states have (on average 1.2820512820512822) internal successors, (200), 167 states have internal predecessors, (200), 46 states have call successors, (46), 20 states have call predecessors, (46), 29 states have return successors, (65), 44 states have call predecessors, (65), 44 states have call successors, (65) [2022-11-26 01:09:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 311 transitions. [2022-11-26 01:09:25,491 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 311 transitions. Word has length 50 [2022-11-26 01:09:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:25,491 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 311 transitions. [2022-11-26 01:09:25,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 01:09:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 311 transitions. [2022-11-26 01:09:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 01:09:25,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:25,493 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:25,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:25,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:25,700 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:25,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1257865549, now seen corresponding path program 1 times [2022-11-26 01:09:25,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:25,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342000501] [2022-11-26 01:09:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:25,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:26,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:26,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342000501] [2022-11-26 01:09:26,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342000501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:26,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850213447] [2022-11-26 01:09:26,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:26,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:26,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:26,071 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:26,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:09:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:26,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:09:26,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:09:26,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:26,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850213447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:26,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:26,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-11-26 01:09:26,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425170131] [2022-11-26 01:09:26,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:26,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:09:26,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:26,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:09:26,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-26 01:09:26,510 INFO L87 Difference]: Start difference. First operand 232 states and 311 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 01:09:26,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:26,954 INFO L93 Difference]: Finished difference Result 441 states and 585 transitions. [2022-11-26 01:09:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:09:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2022-11-26 01:09:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:26,957 INFO L225 Difference]: With dead ends: 441 [2022-11-26 01:09:26,957 INFO L226 Difference]: Without dead ends: 256 [2022-11-26 01:09:26,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-11-26 01:09:26,960 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 50 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:26,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 202 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:09:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-26 01:09:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 234. [2022-11-26 01:09:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 156 states have (on average 1.2628205128205128) internal successors, (197), 167 states have internal predecessors, (197), 48 states have call successors, (48), 20 states have call predecessors, (48), 29 states have return successors, (67), 46 states have call predecessors, (67), 46 states have call successors, (67) [2022-11-26 01:09:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 312 transitions. [2022-11-26 01:09:27,100 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 312 transitions. Word has length 52 [2022-11-26 01:09:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:27,100 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 312 transitions. [2022-11-26 01:09:27,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 01:09:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 312 transitions. [2022-11-26 01:09:27,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-26 01:09:27,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:27,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:09:27,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:09:27,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:27,308 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:27,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:27,309 INFO L85 PathProgramCache]: Analyzing trace with hash 475793178, now seen corresponding path program 1 times [2022-11-26 01:09:27,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:27,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470036829] [2022-11-26 01:09:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 01:09:27,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:27,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470036829] [2022-11-26 01:09:27,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470036829] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430530048] [2022-11-26 01:09:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:27,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:27,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:27,523 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:27,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:09:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-26 01:09:27,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:27,928 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-26 01:09:27,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-26 01:09:27,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-11-26 01:09:27,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-11-26 01:09:27,981 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-26 01:09:27,982 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 40 treesize of output 21 [2022-11-26 01:09:27,988 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 7 treesize of output 3 [2022-11-26 01:09:28,001 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 7 treesize of output 3 [2022-11-26 01:09:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 01:09:38,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:09:43,471 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 01:09:43,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430530048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:09:43,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1130881576] [2022-11-26 01:09:43,473 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:09:43,473 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:09:43,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:09:43,474 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:09:43,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:09:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,548 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 01:09:43,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-26 01:09:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,613 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:09:43,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:09:43,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:09:43,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:09:43,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:09:43,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:09:43,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:09:43,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:43,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:09:44,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:44,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:44,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:44,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:44,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:44,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-26 01:09:44,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:44,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-26 01:09:45,423 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 126 for LOIs [2022-11-26 01:09:45,505 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 01:09:46,282 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 01:09:46,284 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:09:46,305 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:09:46,372 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:09:59,225 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10059#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 33 (select |#length| 2)) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) 1) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|)) (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) 16) 0) (not (= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) 8) 0) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) 24) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_113|) 0) 16))) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:09:59,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:09:59,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:09:59,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 11] total 30 [2022-11-26 01:09:59,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393856465] [2022-11-26 01:09:59,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:09:59,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 01:09:59,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 01:09:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=2831, Unknown=1, NotChecked=0, Total=3192 [2022-11-26 01:09:59,229 INFO L87 Difference]: Start difference. First operand 234 states and 312 transitions. Second operand has 30 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 12 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 11 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-26 01:10:01,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:10:04,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:10:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:13,613 INFO L93 Difference]: Finished difference Result 656 states and 852 transitions. [2022-11-26 01:10:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 01:10:13,614 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 12 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 11 states have call predecessors, (23), 12 states have call successors, (23) Word has length 56 [2022-11-26 01:10:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:13,617 INFO L225 Difference]: With dead ends: 656 [2022-11-26 01:10:13,617 INFO L226 Difference]: Without dead ends: 481 [2022-11-26 01:10:13,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 113 SyntacticMatches, 11 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2610 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=890, Invalid=7119, Unknown=1, NotChecked=0, Total=8010 [2022-11-26 01:10:13,621 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 200 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 246 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:13,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 446 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 1284 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-26 01:10:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-26 01:10:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 311. [2022-11-26 01:10:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 209 states have (on average 1.229665071770335) internal successors, (257), 224 states have internal predecessors, (257), 60 states have call successors, (60), 30 states have call predecessors, (60), 41 states have return successors, (71), 56 states have call predecessors, (71), 56 states have call successors, (71) [2022-11-26 01:10:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 388 transitions. [2022-11-26 01:10:13,854 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 388 transitions. Word has length 56 [2022-11-26 01:10:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:13,854 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 388 transitions. [2022-11-26 01:10:13,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 26 states have internal predecessors, (75), 12 states have call successors, (23), 5 states have call predecessors, (23), 9 states have return successors, (23), 11 states have call predecessors, (23), 12 states have call successors, (23) [2022-11-26 01:10:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 388 transitions. [2022-11-26 01:10:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 01:10:13,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:13,858 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-26 01:10:13,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:14,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:14,066 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2125091793, now seen corresponding path program 1 times [2022-11-26 01:10:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:14,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449424934] [2022-11-26 01:10:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 01:10:14,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449424934] [2022-11-26 01:10:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449424934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116572706] [2022-11-26 01:10:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:14,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:14,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:14,792 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:14,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:10:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:15,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 01:10:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 37 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 01:10:15,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 01:10:15,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116572706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:15,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605685604] [2022-11-26 01:10:15,573 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:10:15,574 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:15,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:15,574 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:15,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:15,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:15,651 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 01:10:15,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-26 01:10:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:15,713 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:10:15,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:10:15,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:10:15,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:15,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:15,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:15,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:15,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:15,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:10:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:15,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:10:16,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:10:16,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-26 01:10:16,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:10:16,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:10:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:16,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-26 01:10:17,578 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 129 for LOIs [2022-11-26 01:10:17,646 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 01:10:18,331 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 01:10:18,332 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:10:18,347 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:10:18,411 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:31,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11956#(and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70| Int)) (and (not (= 3 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0))) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0)) 24) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0)) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0) 16) (not (= 2 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0)) 1) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0)) (= 32 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0))) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0)) 16) 0) (not (= 4 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_70|) 0)) 8) 0))) (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (<= 0 |__VERIFIER_assert_#in~cond|) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= ~tl_last_error~0 0) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 33 (select |#length| 2)) (= (select (select |#memory_int| 1) 1) 0) (<= |__VERIFIER_assert_#in~cond| 1) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:10:31,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:10:31,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:10:31,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 26 [2022-11-26 01:10:31,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589014935] [2022-11-26 01:10:31,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:10:31,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 01:10:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:31,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 01:10:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2519, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 01:10:31,531 INFO L87 Difference]: Start difference. First operand 311 states and 388 transitions. Second operand has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-26 01:10:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:35,564 INFO L93 Difference]: Finished difference Result 728 states and 909 transitions. [2022-11-26 01:10:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-26 01:10:35,565 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) Word has length 66 [2022-11-26 01:10:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:35,569 INFO L225 Difference]: With dead ends: 728 [2022-11-26 01:10:35,569 INFO L226 Difference]: Without dead ends: 468 [2022-11-26 01:10:35,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=835, Invalid=8095, Unknown=0, NotChecked=0, Total=8930 [2022-11-26 01:10:35,574 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 183 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:35,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 684 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1706 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 01:10:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-11-26 01:10:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 325. [2022-11-26 01:10:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 221 states have (on average 1.2262443438914028) internal successors, (271), 234 states have internal predecessors, (271), 62 states have call successors, (62), 30 states have call predecessors, (62), 41 states have return successors, (73), 60 states have call predecessors, (73), 58 states have call successors, (73) [2022-11-26 01:10:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 406 transitions. [2022-11-26 01:10:35,782 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 406 transitions. Word has length 66 [2022-11-26 01:10:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:35,783 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 406 transitions. [2022-11-26 01:10:35,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 22 states have internal predecessors, (77), 12 states have call successors, (23), 2 states have call predecessors, (23), 8 states have return successors, (24), 11 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-26 01:10:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 406 transitions. [2022-11-26 01:10:35,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 01:10:35,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:35,785 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:10:35,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:35,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 01:10:35,992 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1822501617, now seen corresponding path program 1 times [2022-11-26 01:10:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:35,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025935155] [2022-11-26 01:10:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 01:10:38,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:38,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025935155] [2022-11-26 01:10:38,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025935155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:38,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241193994] [2022-11-26 01:10:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:38,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:38,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:38,772 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:38,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 01:10:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:39,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 127 conjunts are in the unsatisfiable core [2022-11-26 01:10:39,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 01:10:43,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:51,735 INFO L321 Elim1Store]: treesize reduction 17, result has 80.5 percent of original size [2022-11-26 01:10:51,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 131 [2022-11-26 01:10:52,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241193994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:52,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1995289528] [2022-11-26 01:10:52,692 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:10:52,692 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:52,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:52,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:52,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:52,751 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-26 01:10:52,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 50 [2022-11-26 01:10:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:52,814 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:10:52,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:10:53,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:10:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:10:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:10:53,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:10:53,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:10:53,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-26 01:10:53,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:10:53,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:53,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-26 01:11:02,578 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 142 for LOIs [2022-11-26 01:11:02,812 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 01:11:03,557 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-26 01:11:03,595 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:11:03,611 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:11:03,674 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:27,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13921#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86| Int)) (and (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|)) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 0) 16) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) (not (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 24) 0) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 8) 0) (= (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 32) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 8) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|) 16) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_86|))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.offset|) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 1) 1) (= |#funAddr~s_can_fail_realloc_allocator.base| (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (<= 0 ~tl_last_error~0) (= |#funAddr~s_can_fail_calloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 24))) (= (select |#valid| 0) 0) (= (select (select |#memory_$Pointer$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 8)) |#funAddr~s_can_fail_free_allocator.base|) (= |#funAddr~s_can_fail_malloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= 33 (select |#length| 2)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:11:27,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:11:27,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:11:27,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 42 [2022-11-26 01:11:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860244581] [2022-11-26 01:11:27,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:11:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 01:11:27,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 01:11:27,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=5870, Unknown=0, NotChecked=0, Total=6320 [2022-11-26 01:11:27,046 INFO L87 Difference]: Start difference. First operand 325 states and 406 transitions. Second operand has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-26 01:11:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:36,075 INFO L93 Difference]: Finished difference Result 577 states and 711 transitions. [2022-11-26 01:11:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-26 01:11:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) Word has length 67 [2022-11-26 01:11:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:36,081 INFO L225 Difference]: With dead ends: 577 [2022-11-26 01:11:36,081 INFO L226 Difference]: Without dead ends: 446 [2022-11-26 01:11:36,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 110 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4460 ImplicationChecksByTransitivity, 32.8s TimeCoverageRelationStatistics Valid=1297, Invalid=13709, Unknown=0, NotChecked=0, Total=15006 [2022-11-26 01:11:36,088 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 415 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:36,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 737 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-26 01:11:36,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-26 01:11:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 341. [2022-11-26 01:11:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 233 states have (on average 1.1888412017167382) internal successors, (277), 244 states have internal predecessors, (277), 64 states have call successors, (64), 34 states have call predecessors, (64), 43 states have return successors, (73), 62 states have call predecessors, (73), 59 states have call successors, (73) [2022-11-26 01:11:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 414 transitions. [2022-11-26 01:11:36,282 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 414 transitions. Word has length 67 [2022-11-26 01:11:36,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:36,283 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 414 transitions. [2022-11-26 01:11:36,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 15 states have call successors, (21), 4 states have call predecessors, (21), 11 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2022-11-26 01:11:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 414 transitions. [2022-11-26 01:11:36,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 01:11:36,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:36,285 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-11-26 01:11:36,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:11:36,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:11:36,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:11:36,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:36,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1648656330, now seen corresponding path program 1 times [2022-11-26 01:11:36,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:36,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039431986] [2022-11-26 01:11:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:36,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-26 01:11:36,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:36,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039431986] [2022-11-26 01:11:36,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039431986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:11:36,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877603058] [2022-11-26 01:11:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:36,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:36,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:36,809 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:11:36,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf2aedcb-de9c-401c-8cec-fbea6c3a39a8/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 01:11:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-26 01:11:37,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:11:39,412 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|)))) is different from true [2022-11-26 01:11:43,517 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_213| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_213|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_213| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_213|) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_harness_~#list~0#1.base_BEFORE_CALL_213|)))) is different from true [2022-11-26 01:11:45,630 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67|) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67|)))) is different from true [2022-11-26 01:11:55,718 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:09,826 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:19,923 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:30,082 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:38,186 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:12:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-26 01:12:38,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:12:41,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:41,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2022-11-26 01:12:41,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:12:41,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2022-11-26 01:12:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 01:12:41,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877603058] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:12:41,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1221890017] [2022-11-26 01:12:41,089 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:12:41,089 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:12:41,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:12:41,090 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:12:41,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:12:41,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,160 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:12:41,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:12:41,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:12:41,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:12:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:12:41,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:12:41,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:12:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-11-26 01:12:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,630 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 01:12:41,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-26 01:12:41,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:41,689 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:12:41,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 01:12:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:12:41,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:41,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:41,777 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:12:41,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 01:12:41,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,878 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:12:41,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:12:41,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:41,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:12:41,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:41,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:41,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:12:42,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:42,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-26 01:12:42,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:42,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-26 01:12:42,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:42,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-26 01:12:42,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:42,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:12:42,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:42,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:42,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:12:42,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:42,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:12:42,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:42,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-26 01:12:43,366 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2022-11-26 01:12:43,376 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 34 for LOIs [2022-11-26 01:12:44,558 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 31 for LOIs [2022-11-26 01:12:44,562 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 104 for LOIs [2022-11-26 01:12:44,579 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:12:44,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:53,276 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15818#(and (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:12:53,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:53,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:12:53,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 14] total 30 [2022-11-26 01:12:53,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899376281] [2022-11-26 01:12:53,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 01:12:53,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 01:12:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2639, Unknown=10, NotChecked=318, Total=3192 [2022-11-26 01:12:53,280 INFO L87 Difference]: Start difference. First operand 341 states and 414 transitions. Second operand has 30 states, 26 states have (on average 3.230769230769231) internal successors, (84), 27 states have internal predecessors, (84), 12 states have call successors, (24), 5 states have call predecessors, (24), 10 states have return successors, (24), 10 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-26 01:12:55,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:12:57,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:12:59,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:05,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:07,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:09,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:17,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:19,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:21,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:23,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:25,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:27,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:29,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:31,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:33,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:35,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:37,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:45,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:47,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:49,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:57,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:13:59,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:01,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:03,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:05,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:13,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:15,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:17,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:19,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:21,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:32,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:34,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:42,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:44,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:46,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:48,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:50,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:52,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:54,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:56,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:14:58,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:15:00,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:15:02,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:15:04,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:15:06,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:15:08,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:15:10,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:15:22,599 WARN L233 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:41,005 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:15:51,087 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:01,167 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:09,240 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:11,275 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61| Int)) (not (= (+ 16 |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|)))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_64|) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_61|)))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67| Int)) (not (= 16 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67|) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67|) 0) |v_ULTIMATE.start_aws_linked_list_rbegin_~list#1.base_BEFORE_CALL_67|))))) is different from true [2022-11-26 01:16:19,343 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)