./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_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_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/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_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/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_4f6fb44a-9231-48a6-a465-1938b6c5c2af/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 b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b --- 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 00:58:30,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:58:30,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:58:30,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:58:30,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:58:30,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:58:30,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:58:30,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:58:30,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:58:30,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:58:30,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:58:30,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:58:30,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:58:30,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:58:30,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:58:30,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:58:30,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:58:30,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:58:30,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:58:30,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:58:30,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:58:30,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:58:30,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:58:30,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:58:30,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:58:30,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:58:30,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:58:30,985 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:58:30,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:58:30,986 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:58:30,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:58:30,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:58:30,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:58:30,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:58:30,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:58:30,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:58:30,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:58:30,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:58:30,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:58:30,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:58:30,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:58:30,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 00:58:31,034 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:58:31,035 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:58:31,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:58:31,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:58:31,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:58:31,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:58:31,037 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:58:31,038 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:58:31,038 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:58:31,038 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:58:31,039 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:58:31,040 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:58:31,040 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:58:31,040 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:58:31,041 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:58:31,041 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:58:31,041 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:58:31,041 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:58:31,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:58:31,043 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:58:31,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:58:31,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:58:31,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:58:31,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:58:31,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:58:31,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:58:31,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:58:31,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:58:31,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:58:31,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:58:31,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:58:31,047 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:58:31,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:58:31,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:58:31,048 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:58:31,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:58:31,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:58:31,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:58:31,049 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_4f6fb44a-9231-48a6-a465-1938b6c5c2af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8488bc4b38d88c79bc520e9824284003ed2f71ce856a53cf11e7fc61dbeef4b [2022-11-26 00:58:31,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:58:31,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:58:31,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:58:31,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:58:31,414 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:58:31,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-26 00:58:34,443 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:58:34,942 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:58:34,947 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i [2022-11-26 00:58:34,979 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/data/28410677c/b7b4e314853a49fa898879f5ead55731/FLAG6a8a102d4 [2022-11-26 00:58:34,994 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/data/28410677c/b7b4e314853a49fa898879f5ead55731 [2022-11-26 00:58:34,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:58:34,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:58:35,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:58:35,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:58:35,004 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:58:35,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:58:34" (1/1) ... [2022-11-26 00:58:35,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d22bf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:35, skipping insertion in model container [2022-11-26 00:58:35,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:58:34" (1/1) ... [2022-11-26 00:58:35,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:58:35,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:58:35,394 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_4f6fb44a-9231-48a6-a465-1938b6c5c2af/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-26 00:58:35,405 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_4f6fb44a-9231-48a6-a465-1938b6c5c2af/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-26 00:58:36,443 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:58:36,448 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,449 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,450 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,451 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,452 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,466 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,467 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,468 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,469 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,471 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,472 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,473 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,473 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:36,532 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:58:36,533 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:58:36,534 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:58:36,539 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:58:36,542 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:58:36,542 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:58:36,779 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:58:36,780 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:58:36,782 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:58:36,783 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:58:36,784 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:58:36,786 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:58:36,786 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:58:36,787 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:58:36,788 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:58:36,788 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:58:36,789 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:58:36,933 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:58:36,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:58:36,980 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:58:37,009 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_4f6fb44a-9231-48a6-a465-1938b6c5c2af/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4495,4508] [2022-11-26 00:58:37,011 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_4f6fb44a-9231-48a6-a465-1938b6c5c2af/sv-benchmarks/c/aws-c-common/aws_linked_list_begin_harness.i[4555,4568] [2022-11-26 00:58:37,070 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:58:37,074 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,074 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,075 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,075 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,076 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,097 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,098 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,099 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,099 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,101 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,101 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,102 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,102 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:58:37,117 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:58:37,118 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:58:37,120 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:58:37,130 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:58:37,138 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:58:37,138 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:58:37,168 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:58:37,169 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:58:37,170 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:58:37,171 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:58:37,172 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:58:37,178 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:58:37,178 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:58:37,179 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:58:37,180 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:58:37,181 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:58:37,182 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:58:37,226 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:58:37,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:58:37,521 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:58:37,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37 WrapperNode [2022-11-26 00:58:37,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:58:37,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:58:37,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:58:37,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:58:37,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,654 INFO L138 Inliner]: procedures = 679, calls = 1040, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 141 [2022-11-26 00:58:37,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:58:37,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:58:37,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:58:37,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:58:37,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,691 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:58:37,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:58:37,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:58:37,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:58:37,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (1/1) ... [2022-11-26 00:58:37,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:58:37,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:37,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:58:37,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:58:37,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:58:37,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:58:37,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:58:37,788 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-26 00:58:37,788 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-26 00:58:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:58:37,789 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-26 00:58:37,790 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-26 00:58:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:58:37,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:58:37,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:58:37,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:58:37,791 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:58:37,791 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:58:37,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:58:37,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:58:37,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:58:37,792 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-26 00:58:37,792 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-26 00:58:37,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:58:38,094 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:58:38,096 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:58:38,408 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:58:38,518 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:58:38,519 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:58:38,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:58:38 BoogieIcfgContainer [2022-11-26 00:58:38,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:58:38,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:58:38,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:58:38,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:58:38,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:58:34" (1/3) ... [2022-11-26 00:58:38,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@efb73b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:58:38, skipping insertion in model container [2022-11-26 00:58:38,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:58:37" (2/3) ... [2022-11-26 00:58:38,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@efb73b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:58:38, skipping insertion in model container [2022-11-26 00:58:38,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:58:38" (3/3) ... [2022-11-26 00:58:38,531 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_begin_harness.i [2022-11-26 00:58:38,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:58:38,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:58:38,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:58:38,657 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;@1a7fbb29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:58:38,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:58:38,662 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 00:58:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-26 00:58:38,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:38,671 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 00:58:38,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:38,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -176466560, now seen corresponding path program 1 times [2022-11-26 00:58:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:38,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490151927] [2022-11-26 00:58:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:38,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:39,415 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 00:58:39,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:39,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490151927] [2022-11-26 00:58:39,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490151927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:39,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042306697] [2022-11-26 00:58:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:39,421 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:39,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:58:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-26 00:58:39,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:39,957 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 00:58:39,971 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 00:58:40,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:40,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:40,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:40,114 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 00:58:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:40,144 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 00:58:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:58:42,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:58:42,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042306697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:42,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:58:42,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2022-11-26 00:58:42,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850367164] [2022-11-26 00:58:42,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:42,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:58:42,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:58:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:58:42,665 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 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:58:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:43,616 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-11-26 00:58:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:58:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-26 00:58:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:43,626 INFO L225 Difference]: With dead ends: 124 [2022-11-26 00:58:43,626 INFO L226 Difference]: Without dead ends: 81 [2022-11-26 00:58:43,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:58:43,633 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:43,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 226 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:58:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-26 00:58:43,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-11-26 00:58:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-26 00:58:43,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2022-11-26 00:58:43,700 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 37 [2022-11-26 00:58:43,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:43,701 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2022-11-26 00:58:43,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-26 00:58:43,702 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2022-11-26 00:58:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-26 00:58:43,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:43,707 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 00:58:43,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 00:58:43,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:58:43,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:43,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1924856341, now seen corresponding path program 1 times [2022-11-26 00:58:43,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:43,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500536931] [2022-11-26 00:58:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:43,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:44,298 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 00:58:44,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:44,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500536931] [2022-11-26 00:58:44,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500536931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234050782] [2022-11-26 00:58:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:44,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:44,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:44,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:44,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:58:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:44,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-26 00:58:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:44,610 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 00:58:44,635 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 00:58:44,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,710 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 00:58:44,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,717 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 00:58:44,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,740 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 00:58:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,749 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 00:58:44,865 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 00:58:44,867 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 00:58:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,881 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 00:58:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,897 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 48 treesize of output 41 [2022-11-26 00:58:44,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,908 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 00:58:44,929 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 16 treesize of output 15 [2022-11-26 00:58:44,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:44,948 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 82 treesize of output 25 [2022-11-26 00:58:44,953 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 13 treesize of output 9 [2022-11-26 00:58:47,326 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 00:58:47,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:52,319 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16)) (.cse2 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 8)) (.cse0 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse1) 0)) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse2) 0)) (let ((.cse3 (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 24))) (or (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_225 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_225) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_227) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))) (forall ((v_ArrVal_224 Int) (v_ArrVal_226 (Array Int Int)) (v_ArrVal_222 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_222) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse0 v_ArrVal_224)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) .cse3) 0))))))) is different from false [2022-11-26 00:58:53,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:53,311 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 60 treesize of output 53 [2022-11-26 00:58:53,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:53,339 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 141 treesize of output 137 [2022-11-26 00:58:53,358 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 132 treesize of output 128 [2022-11-26 00:58:53,372 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 128 treesize of output 126 [2022-11-26 00:58:53,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:53,400 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 60 treesize of output 53 [2022-11-26 00:58:53,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:53,427 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 516 treesize of output 444 [2022-11-26 00:58:53,446 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 322 treesize of output 314 [2022-11-26 00:58:53,469 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 314 treesize of output 310 [2022-11-26 00:58:53,648 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 6 treesize of output 4 [2022-11-26 00:58:53,661 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 6 treesize of output 4 [2022-11-26 00:58:53,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:53,709 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 56 treesize of output 72 [2022-11-26 00:58:53,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:53,789 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 69 treesize of output 79 [2022-11-26 00:58:53,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:58:53,861 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 54 [2022-11-26 00:58:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:53,875 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 64 treesize of output 56 [2022-11-26 00:58:53,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,895 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-26 00:58:53,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 24 [2022-11-26 00:58:53,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,903 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 00:58:53,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,924 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-26 00:58:53,925 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 00:58:53,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,936 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-26 00:58:53,936 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 00:58:53,944 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:58:53,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:53,959 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-26 00:58:53,960 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 00:58:54,119 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 00:58:54,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234050782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:54,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084069811] [2022-11-26 00:58:54,141 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-26 00:58:54,141 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:54,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:54,151 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:54,152 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,256 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-26 00:58:54,256 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 46 [2022-11-26 00:58:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,331 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:58:54,331 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 00:58:54,611 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 00:58:54,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,632 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 00:58:54,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,660 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 00:58:54,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,690 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 00:58:54,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,812 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 00:58:54,813 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 00:58:54,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,868 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 00:58:54,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,898 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 00:58:54,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:54,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:54,953 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 00:58:54,953 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 00:58:55,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,090 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:58:55,091 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 00:58:55,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:55,135 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 00:58:55,231 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 00:58:55,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:58:55,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,256 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 00:58:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,276 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 00:58:55,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,300 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 00:58:55,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,321 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 00:58:55,340 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 00:58:55,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,376 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 00:58:55,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,410 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 00:58:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,430 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 00:58:55,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:58:55,442 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 00:58:56,118 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-26 00:58:56,337 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 135 for LOIs [2022-11-26 00:58:56,393 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 00:58:56,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:58:59,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2084069811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:58:59,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:59,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 10, 9] total 32 [2022-11-26 00:58:59,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925530473] [2022-11-26 00:58:59,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:58:59,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:58:59,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:58:59,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=818, Unknown=16, NotChecked=58, Total=992 [2022-11-26 00:58:59,785 INFO L87 Difference]: Start difference. First operand 79 states and 104 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 00:59:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:01,934 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2022-11-26 00:59:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:59:01,935 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 00:59:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:01,937 INFO L225 Difference]: With dead ends: 141 [2022-11-26 00:59:01,938 INFO L226 Difference]: Without dead ends: 105 [2022-11-26 00:59:01,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=121, Invalid=989, Unknown=16, NotChecked=64, Total=1190 [2022-11-26 00:59:01,940 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:01,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 171 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:59:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-26 00:59:01,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-26 00:59:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 68 states have internal predecessors, (87), 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 00:59:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2022-11-26 00:59:01,977 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 38 [2022-11-26 00:59:01,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:01,977 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 138 transitions. [2022-11-26 00:59:01,977 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 00:59:01,978 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 138 transitions. [2022-11-26 00:59:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-26 00:59:01,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:01,979 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] [2022-11-26 00:59:01,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:02,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:02,186 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:02,186 INFO L85 PathProgramCache]: Analyzing trace with hash 2002901553, now seen corresponding path program 1 times [2022-11-26 00:59:02,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:02,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284747260] [2022-11-26 00:59:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:02,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:59:02,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:02,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284747260] [2022-11-26 00:59:02,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284747260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:02,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217891063] [2022-11-26 00:59:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:02,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:02,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:02,375 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:02,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:59:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:59:02,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:59:02,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:02,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217891063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:02,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:02,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-26 00:59:02,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148130152] [2022-11-26 00:59:02,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:02,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:59:02,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:02,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:59:02,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:59:02,624 INFO L87 Difference]: Start difference. First operand 105 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 00:59:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:02,780 INFO L93 Difference]: Finished difference Result 211 states and 278 transitions. [2022-11-26 00:59:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:59:02,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 40 [2022-11-26 00:59:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:02,782 INFO L225 Difference]: With dead ends: 211 [2022-11-26 00:59:02,782 INFO L226 Difference]: Without dead ends: 113 [2022-11-26 00:59:02,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 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 00:59:02,784 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 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 00:59:02,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 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 00:59:02,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-26 00:59:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-11-26 00:59:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 1.3076923076923077) internal successors, (85), 68 states have internal predecessors, (85), 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 00:59:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 136 transitions. [2022-11-26 00:59:02,821 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 136 transitions. Word has length 40 [2022-11-26 00:59:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:02,821 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 136 transitions. [2022-11-26 00:59:02,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 00:59:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 136 transitions. [2022-11-26 00:59:02,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:59:02,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:02,823 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, 1] [2022-11-26 00:59:02,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:03,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:03,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:03,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:03,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1414514697, now seen corresponding path program 1 times [2022-11-26 00:59:03,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:03,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101374688] [2022-11-26 00:59:03,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:03,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:59:03,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101374688] [2022-11-26 00:59:03,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101374688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:03,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910549511] [2022-11-26 00:59:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:03,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:03,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:03,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:03,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:59:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:03,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:59:03,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:59:03,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:03,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910549511] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:03,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:03,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-26 00:59:03,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545713093] [2022-11-26 00:59:03,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:03,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:59:03,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:59:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:59:03,589 INFO L87 Difference]: Start difference. First operand 105 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 00:59:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:03,842 INFO L93 Difference]: Finished difference Result 253 states and 338 transitions. [2022-11-26 00:59:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:59:03,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 42 [2022-11-26 00:59:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:03,845 INFO L225 Difference]: With dead ends: 253 [2022-11-26 00:59:03,845 INFO L226 Difference]: Without dead ends: 153 [2022-11-26 00:59:03,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:59:03,847 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 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 00:59:03,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 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 00:59:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-26 00:59:03,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 107. [2022-11-26 00:59:03,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.2985074626865671) internal successors, (87), 70 states have internal predecessors, (87), 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 00:59:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2022-11-26 00:59:03,894 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 42 [2022-11-26 00:59:03,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:03,894 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2022-11-26 00:59:03,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 00:59:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2022-11-26 00:59:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:59:03,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:03,896 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] [2022-11-26 00:59:03,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:04,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash 52028477, now seen corresponding path program 1 times [2022-11-26 00:59:04,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:04,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963432546] [2022-11-26 00:59:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:04,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:59:04,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:04,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963432546] [2022-11-26 00:59:04,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963432546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:04,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076355522] [2022-11-26 00:59:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:04,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:04,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:04,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:59:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:59:04,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:59:04,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:04,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076355522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:04,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:04,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-26 00:59:04,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247222502] [2022-11-26 00:59:04,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:04,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:59:04,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:04,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:59:04,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:59:04,616 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 00:59:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:04,695 INFO L93 Difference]: Finished difference Result 229 states and 313 transitions. [2022-11-26 00:59:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:59:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 43 [2022-11-26 00:59:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:04,700 INFO L225 Difference]: With dead ends: 229 [2022-11-26 00:59:04,700 INFO L226 Difference]: Without dead ends: 135 [2022-11-26 00:59:04,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 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 00:59:04,703 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 00:59:04,704 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 00:59:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-26 00:59:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2022-11-26 00:59:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 76 states have internal predecessors, (95), 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 00:59:04,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2022-11-26 00:59:04,765 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 43 [2022-11-26 00:59:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:04,767 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2022-11-26 00:59:04,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 00:59:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2022-11-26 00:59:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-26 00:59:04,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:04,776 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 00:59:04,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:04,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:04,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1772458512, now seen corresponding path program 1 times [2022-11-26 00:59:04,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:04,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918517118] [2022-11-26 00:59:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:04,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:05,327 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 00:59:05,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:05,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918517118] [2022-11-26 00:59:05,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918517118] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:05,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900306990] [2022-11-26 00:59:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:05,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:05,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:05,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:05,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:59:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-26 00:59:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:05,693 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 00:59:05,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:05,699 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 00:59:05,766 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 00:59:05,767 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 00:59:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:05,773 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 00:59:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:05,782 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 15 treesize of output 17 [2022-11-26 00:59:05,791 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 16 treesize of output 15 [2022-11-26 00:59:05,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:05,803 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 82 treesize of output 25 [2022-11-26 00:59:05,808 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 13 treesize of output 9 [2022-11-26 00:59:16,070 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:59:21,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:26,302 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:59:26,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900306990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:26,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1449976453] [2022-11-26 00:59:26,305 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-26 00:59:26,306 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:26,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:26,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:26,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:26,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,386 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:59:26,387 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 00:59:26,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,407 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 00:59:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,646 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 00:59:26,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,685 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 00:59:26,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,716 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 00:59:26,740 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 00:59:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,839 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 00:59:26,840 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 00:59:26,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,870 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 00:59:26,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,949 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:59:26,949 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 00:59:26,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:26,993 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 00:59:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,026 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 00:59:27,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,070 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 00:59:27,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,662 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 00:59:27,663 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 662 treesize of output 671 [2022-11-26 00:59:27,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:27,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:27,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:28,037 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-26 00:59:28,038 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 676 treesize of output 685 [2022-11-26 00:59:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:28,073 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 00:59:28,331 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-26 00:59:28,332 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 648 treesize of output 678 [2022-11-26 00:59:28,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:28,397 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 00:59:28,398 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 680 treesize of output 633 [2022-11-26 00:59:28,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 654 treesize of output 633 [2022-11-26 00:59:28,531 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-26 00:59:28,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 641 treesize of output 652 [2022-11-26 00:59:30,789 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 00:59:30,798 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 00:59:30,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:30,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:30,820 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 00:59:30,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:30,838 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 00:59:30,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:30,875 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 00:59:30,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:30,899 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 00:59:30,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:30,928 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 00:59:30,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:30,947 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 00:59:30,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:30,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:30,965 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 00:59:30,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:30,985 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 00:59:31,664 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 43 for LOIs [2022-11-26 00:59:32,068 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 155 for LOIs [2022-11-26 00:59:32,142 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 00:59:32,161 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-26 00:59:32,232 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:38,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1449976453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:38,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:38,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 17, 8] total 46 [2022-11-26 00:59:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087155008] [2022-11-26 00:59:38,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:59:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:59:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:59:38,737 INFO L87 Difference]: Start difference. First operand 113 states and 146 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 00:59:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:42,637 INFO L93 Difference]: Finished difference Result 231 states and 295 transitions. [2022-11-26 00:59:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:59:42,638 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 00:59:42,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:42,639 INFO L225 Difference]: With dead ends: 231 [2022-11-26 00:59:42,639 INFO L226 Difference]: Without dead ends: 127 [2022-11-26 00:59:42,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=224, Invalid=2428, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:59:42,641 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:42,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 169 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:59:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-26 00:59:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-26 00:59:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.3) internal successors, (104), 84 states have internal predecessors, (104), 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 00:59:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 160 transitions. [2022-11-26 00:59:42,687 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 160 transitions. Word has length 46 [2022-11-26 00:59:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:42,687 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 160 transitions. [2022-11-26 00:59:42,688 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 00:59:42,688 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 160 transitions. [2022-11-26 00:59:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-26 00:59:42,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:42,689 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 00:59:42,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:42,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:59:42,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:59:42,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:42,891 INFO L85 PathProgramCache]: Analyzing trace with hash -288172042, now seen corresponding path program 1 times [2022-11-26 00:59:42,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:42,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052292050] [2022-11-26 00:59:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:42,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:43,804 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 00:59:43,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:43,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052292050] [2022-11-26 00:59:43,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052292050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:43,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107066457] [2022-11-26 00:59:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:43,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:43,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:43,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:43,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:59:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:44,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-26 00:59:44,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:44,183 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 00:59:44,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:44,189 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 00:59:44,263 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-26 00:59:44,263 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 74 treesize of output 100 [2022-11-26 00:59:44,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:44,270 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 86 treesize of output 72 [2022-11-26 00:59:44,277 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 00:59:44,362 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_19 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_18) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_19) .cse0 v_DerPreprocessor_18) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51| v_DerPreprocessor_19) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_19 24)) (not (= .cse0 0)) (<= (+ .cse0 2) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_51|))))) is different from true [2022-11-26 00:59:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:59:44,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:45,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:59:45,289 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 40 treesize of output 33 [2022-11-26 00:59:45,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:59:45,307 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 314 treesize of output 290 [2022-11-26 00:59:45,316 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 306 treesize of output 298 [2022-11-26 00:59:45,331 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 298 treesize of output 294 [2022-11-26 00:59:45,408 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 6 treesize of output 4 [2022-11-26 00:59:45,430 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 24 treesize of output 22 [2022-11-26 00:59:45,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:59:45,475 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 68 treesize of output 64 [2022-11-26 00:59:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:59:45,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107066457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:45,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103678834] [2022-11-26 00:59:45,720 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 00:59:45,720 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:45,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:59:45,720 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:59:45,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:59:45,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:45,797 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 00:59:45,797 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 00:59:45,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:45,814 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 00:59:46,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,058 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 00:59:46,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,097 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 00:59:46,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,129 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 00:59:46,175 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 00:59:46,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,226 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 00:59:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,301 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 00:59:46,302 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 00:59:46,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,331 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 00:59:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,360 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 00:59:46,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:46,394 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 00:59:46,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,423 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 00:59:46,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:46,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:46,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:46,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:46,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:46,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:46,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:46,990 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 00:59:46,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 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 00:59:47,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:47,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:47,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:47,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:47,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:47,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:47,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:47,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:47,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:47,353 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-26 00:59:47,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 680 treesize of output 689 [2022-11-26 00:59:47,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:59:47,398 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 00:59:47,720 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-26 00:59:47,721 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 652 treesize of output 682 [2022-11-26 00:59:47,885 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-26 00:59:47,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-11-26 00:59:47,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:59:47,964 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 00:59:47,964 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 00:59:47,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 01:00:07,309 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 01:00:07,318 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 01:00:07,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:00:07,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:07,352 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 01:00:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:07,380 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 01:00:07,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:07,397 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 01:00:07,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:07,418 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 01:00:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:07,446 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 01:00:07,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:07,463 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 01:00:07,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:07,483 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 01:00:07,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:07,494 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 01:00:07,990 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-26 01:00:08,795 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 154 for LOIs [2022-11-26 01:00:08,840 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:00:08,858 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:00:08,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:00:14,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1103678834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:14,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:14,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 12, 11] total 46 [2022-11-26 01:00:14,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505780329] [2022-11-26 01:00:14,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:14,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 01:00:14,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 01:00:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1811, Unknown=11, NotChecked=86, Total=2070 [2022-11-26 01:00:14,159 INFO L87 Difference]: Start difference. First operand 125 states and 160 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 01:00:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:19,329 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2022-11-26 01:00:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 01:00:19,330 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 01:00:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:19,331 INFO L225 Difference]: With dead ends: 257 [2022-11-26 01:00:19,331 INFO L226 Difference]: Without dead ends: 141 [2022-11-26 01:00:19,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=268, Invalid=2575, Unknown=23, NotChecked=104, Total=2970 [2022-11-26 01:00:19,333 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 57 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:19,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 183 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-26 01:00:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-26 01:00:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2022-11-26 01:00:19,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 82 states have (on average 1.2926829268292683) internal successors, (106), 86 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 01:00:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 162 transitions. [2022-11-26 01:00:19,371 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 162 transitions. Word has length 48 [2022-11-26 01:00:19,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:19,371 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 162 transitions. [2022-11-26 01:00:19,372 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 01:00:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 162 transitions. [2022-11-26 01:00:19,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-26 01:00:19,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:19,373 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, 1] [2022-11-26 01:00:19,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:19,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:19,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:19,574 INFO L85 PathProgramCache]: Analyzing trace with hash 608912414, now seen corresponding path program 1 times [2022-11-26 01:00:19,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:19,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383303718] [2022-11-26 01:00:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:19,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 01:00:19,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:19,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383303718] [2022-11-26 01:00:19,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383303718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:19,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533458275] [2022-11-26 01:00:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:19,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:19,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:19,805 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:19,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:00:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:20,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-26 01:00:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:20,161 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 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 01:00:20,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:20,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 16 [2022-11-26 01:00:20,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:20,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:20,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 21 [2022-11-26 01:00:20,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:20,204 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 16 treesize of output 20 [2022-11-26 01:00:20,462 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 01:00:20,462 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 24 treesize of output 12 [2022-11-26 01:00:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 01:00:20,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:20,771 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_946 (Array Int Int)) (v_ArrVal_947 (Array Int Int)) (v_ArrVal_948 Int)) (not (= (+ |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 16) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_946) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_947) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_948)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)))) is different from false [2022-11-26 01:00:20,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:00:20,785 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 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 01:00:20,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:00:20,808 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 133 treesize of output 149 [2022-11-26 01:00:20,815 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 148 treesize of output 144 [2022-11-26 01:00:20,823 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 144 treesize of output 142 [2022-11-26 01:00:20,911 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 6 treesize of output 4 [2022-11-26 01:00:20,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:00:20,922 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 72 treesize of output 72 [2022-11-26 01:00:20,999 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2022-11-26 01:00:21,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2022-11-26 01:00:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 1 not checked. [2022-11-26 01:00:21,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533458275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:21,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746267917] [2022-11-26 01:00:21,140 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:00:21,140 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:21,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:00:21,141 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:00:21,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:00:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,208 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-26 01:00:21,209 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 46 [2022-11-26 01:00:21,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,268 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:00:21,268 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 01:00:21,501 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 01:00:21,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,522 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 01:00:21,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,546 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 01:00:21,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,570 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 01:00:21,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,619 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 01:00:21,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:00:21,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:00:21,664 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:00:21,665 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 01:00:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,757 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:00:21,757 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 01:00:21,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,789 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 01:00:21,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,817 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 01:00:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,851 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 01:00:21,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:00:21,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,921 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 01:00:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,939 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 01:00:21,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,961 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 01:00:21,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:21,981 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 01:00:21,994 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 01:00:22,016 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 01:00:22,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:22,049 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 01:00:22,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:22,063 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 01:00:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:22,083 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 01:00:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:00:22,104 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 01:00:24,654 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-26 01:00:24,678 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 01:00:25,383 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 01:00:25,385 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:00:25,403 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:00:25,464 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:00:32,512 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5068#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67| Int)) (and (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24)) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_67| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_67|))) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:00:32,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:32,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:32,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 11] total 24 [2022-11-26 01:00:32,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793674827] [2022-11-26 01:00:32,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:32,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 01:00:32,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:32,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 01:00:32,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2253, Unknown=1, NotChecked=96, Total=2550 [2022-11-26 01:00:32,516 INFO L87 Difference]: Start difference. First operand 127 states and 162 transitions. Second operand has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-26 01:00:34,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:34,264 INFO L93 Difference]: Finished difference Result 264 states and 346 transitions. [2022-11-26 01:00:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 01:00:34,264 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 49 [2022-11-26 01:00:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:34,266 INFO L225 Difference]: With dead ends: 264 [2022-11-26 01:00:34,266 INFO L226 Difference]: Without dead ends: 201 [2022-11-26 01:00:34,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=304, Invalid=3359, Unknown=1, NotChecked=118, Total=3782 [2022-11-26 01:00:34,268 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 199 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:34,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 517 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1060 Invalid, 0 Unknown, 130 Unchecked, 1.2s Time] [2022-11-26 01:00:34,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-26 01:00:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 131. [2022-11-26 01:00:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 90 states have internal predecessors, (110), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-26 01:00:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-11-26 01:00:34,326 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 49 [2022-11-26 01:00:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:34,326 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-11-26 01:00:34,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.25) internal successors, (65), 23 states have internal predecessors, (65), 9 states have call successors, (24), 3 states have call predecessors, (24), 7 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-11-26 01:00:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-11-26 01:00:34,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 01:00:34,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:34,328 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2022-11-26 01:00:34,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:34,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:34,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:34,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1615843155, now seen corresponding path program 1 times [2022-11-26 01:00:34,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860585425] [2022-11-26 01:00:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:34,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:34,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:00:34,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860585425] [2022-11-26 01:00:34,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860585425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:34,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828825731] [2022-11-26 01:00:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:34,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:34,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:34,728 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:34,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:00:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:35,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:00:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 01:00:35,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:35,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828825731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:35,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:00:35,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-26 01:00:35,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260438782] [2022-11-26 01:00:35,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:35,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 01:00:35,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 01:00:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 01:00:35,095 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 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 01:00:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:35,301 INFO L93 Difference]: Finished difference Result 251 states and 317 transitions. [2022-11-26 01:00:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 01:00:35,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 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 01:00:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:35,304 INFO L225 Difference]: With dead ends: 251 [2022-11-26 01:00:35,304 INFO L226 Difference]: Without dead ends: 133 [2022-11-26 01:00:35,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:00:35,306 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:35,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 176 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 01:00:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-26 01:00:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2022-11-26 01:00:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 90 states have internal predecessors, (108), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-26 01:00:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 165 transitions. [2022-11-26 01:00:35,344 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 165 transitions. Word has length 52 [2022-11-26 01:00:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:35,344 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 165 transitions. [2022-11-26 01:00:35,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 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 01:00:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 165 transitions. [2022-11-26 01:00:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-26 01:00:35,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:35,346 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 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, 1] [2022-11-26 01:00:35,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:35,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:35,553 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1603461069, now seen corresponding path program 1 times [2022-11-26 01:00:35,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:35,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264434149] [2022-11-26 01:00:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:35,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 01:00:35,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:35,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264434149] [2022-11-26 01:00:35,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264434149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:35,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136908556] [2022-11-26 01:00:35,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:35,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:35,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:35,762 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:35,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:00:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:00:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:00:36,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:36,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136908556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:36,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:00:36,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-26 01:00:36,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397611195] [2022-11-26 01:00:36,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:36,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:00:36,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:36,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:00:36,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:00:36,150 INFO L87 Difference]: Start difference. First operand 131 states and 165 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 01:00:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:36,435 INFO L93 Difference]: Finished difference Result 277 states and 347 transitions. [2022-11-26 01:00:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:00:36,435 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 56 [2022-11-26 01:00:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:36,437 INFO L225 Difference]: With dead ends: 277 [2022-11-26 01:00:36,437 INFO L226 Difference]: Without dead ends: 157 [2022-11-26 01:00:36,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-11-26 01:00:36,438 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 49 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:36,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 202 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:00:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-26 01:00:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 131. [2022-11-26 01:00:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 90 states have internal predecessors, (106), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 26 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-26 01:00:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2022-11-26 01:00:36,490 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 56 [2022-11-26 01:00:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:36,491 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2022-11-26 01:00:36,491 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 01:00:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2022-11-26 01:00:36,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 01:00:36,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:36,492 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:36,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:36,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:00:36,699 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:36,699 INFO L85 PathProgramCache]: Analyzing trace with hash -113358028, now seen corresponding path program 1 times [2022-11-26 01:00:36,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:36,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403117234] [2022-11-26 01:00:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:36,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:00:36,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:36,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403117234] [2022-11-26 01:00:36,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403117234] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:36,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179815168] [2022-11-26 01:00:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:36,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:36,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:36,947 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:36,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:00:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-26 01:00:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:37,375 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-26 01:00:37,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 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 01:00:37,382 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 10 treesize of output 9 [2022-11-26 01:00:37,390 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 16 treesize of output 15 [2022-11-26 01:00:37,441 INFO L321 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2022-11-26 01:00:37,442 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 36 [2022-11-26 01:00:37,445 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 29 treesize of output 17 [2022-11-26 01:00:37,521 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (not (= .cse0 0)) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= .cse0 (select v_DerPreprocessor_40 24)))))))) is different from true [2022-11-26 01:00:55,799 WARN L233 SmtUtils]: Spent 14.47s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:01:04,122 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| Int)) (let ((.cse2 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (let ((.cse0 (select .cse2 24)) (.cse1 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (and (= (select v_DerPreprocessor_40 24) .cse0) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| v_DerPreprocessor_40) .cse0 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| v_DerPreprocessor_40) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= (select .cse1 0) 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|) (= (select .cse1 8) 0) (= (select .cse2 16) 0) (= 0 (select .cse2 8)) (not (= .cse0 0)) (= (select .cse1 16) 0))))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|)) (.cse4 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| (select .cse3 24)) (not (= (select .cse4 0) 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|) (= (select .cse4 8) 0) (= (select .cse3 16) 0) (= 0 (select .cse3 8)) (= (select .cse4 16) 0)))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| Int)) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|)) (.cse6 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (and (= |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| (select .cse5 24)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|) (not (= (select .cse5 0) 0)) (= (select .cse6 8) 0) (= (select .cse5 16) 0) (= 0 (select .cse5 8)) (= (select .cse6 16) 0)))) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| Int)) (let ((.cse8 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (let ((.cse7 (select .cse8 24)) (.cse9 (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|))) (and (= (select v_DerPreprocessor_40 24) .cse7) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse7 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| v_DerPreprocessor_40) .cse7 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106| v_DerPreprocessor_40) .cse7) (select |c_#memory_$Pointer$.base| .cse7)) (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_106|) (not (= (select .cse8 0) 0)) (= (select .cse9 8) 0) (= (select .cse8 16) 0) (= 0 (select .cse8 8)) (not (= .cse7 0)) (= (select .cse9 16) 0)))))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|))) (exists ((|v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) 24))) (and (<= 2 |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105|) (not (= .cse10 0)) (exists ((v_DerPreprocessor_40 (Array Int Int)) (v_DerPreprocessor_39 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse10 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse10 v_DerPreprocessor_39) |v_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base_BEFORE_CALL_105| v_DerPreprocessor_40) .cse10) (select |c_#memory_$Pointer$.base| .cse10)) (= .cse10 (select v_DerPreprocessor_40 24))))))))) is different from true [2022-11-26 01:01:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2022-11-26 01:01:22,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-26 01:01:26,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179815168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:26,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724480741] [2022-11-26 01:01:26,696 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-26 01:01:26,696 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:26,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:26,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:26,697 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:26,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,765 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:01:26,765 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 01:01:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:26,783 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 01:01:26,989 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 01:01:27,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,011 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 01:01:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,036 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 01:01:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,064 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 39 treesize of output 30 [2022-11-26 01:01:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,181 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:01:27,181 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 01:01:27,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,206 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 01:01:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:27,230 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 01:01:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,259 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 01:01:27,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,291 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 01:01:27,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,322 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 01:01:27,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:27,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:27,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:27,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:27,856 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 01:01:27,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 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 01:01:27,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:27,939 INFO L321 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2022-11-26 01:01:27,940 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 672 treesize of output 637 [2022-11-26 01:01:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:27,975 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 658 treesize of output 637 [2022-11-26 01:01:28,236 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-26 01:01:28,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 645 treesize of output 656 [2022-11-26 01:01:28,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:28,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:28,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:28,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:28,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:28,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:28,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:28,508 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-26 01:01:28,509 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 690 treesize of output 693 [2022-11-26 01:01:28,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:28,544 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 01:01:28,704 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-26 01:01:28,705 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 668 [2022-11-26 01:01:41,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:41,933 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 01:01:41,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:41,959 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 01:01:41,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:41,976 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 01:01:41,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:41,998 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 71 treesize of output 19 [2022-11-26 01:01:42,009 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 01:01:42,021 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 01:01:42,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:42,053 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 01:01:42,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:42,066 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 01:01:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:42,075 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 01:01:42,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:42,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:42,089 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 01:01:42,534 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 49 for LOIs [2022-11-26 01:01:43,295 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 155 for LOIs [2022-11-26 01:01:43,350 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:01:43,369 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:01:43,436 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:51,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1724480741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:01:51,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:01:51,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [6, 23, 8] total 51 [2022-11-26 01:01:51,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426470292] [2022-11-26 01:01:51,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:01:51,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 01:01:51,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:51,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 01:01:51,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2106, Unknown=63, NotChecked=190, Total=2550 [2022-11-26 01:01:51,479 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 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 01:01:57,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:57,354 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2022-11-26 01:01:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 01:01:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 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 60 [2022-11-26 01:01:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:57,356 INFO L225 Difference]: With dead ends: 261 [2022-11-26 01:01:57,356 INFO L226 Difference]: Without dead ends: 139 [2022-11-26 01:01:57,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=271, Invalid=2853, Unknown=76, NotChecked=222, Total=3422 [2022-11-26 01:01:57,358 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:57,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 143 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 01:01:57,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-26 01:01:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2022-11-26 01:01:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 90 states have internal predecessors, (104), 28 states have call successors, (28), 14 states have call predecessors, (28), 17 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2022-11-26 01:01:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2022-11-26 01:01:57,413 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 60 [2022-11-26 01:01:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:57,413 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2022-11-26 01:01:57,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 13 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 01:01:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2022-11-26 01:01:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 01:01:57,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:01:57,415 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:57,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 01:01:57,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:01:57,628 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:01:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:01:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash -129172476, now seen corresponding path program 1 times [2022-11-26 01:01:57,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:01:57,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28736270] [2022-11-26 01:01:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:57,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:01:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 01:01:57,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:01:57,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28736270] [2022-11-26 01:01:57,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28736270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:01:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951805191] [2022-11-26 01:01:57,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:01:57,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:01:57,923 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:01:57,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:01:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:01:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 01:01:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:01:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 01:01:58,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 01:01:58,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951805191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:58,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307128437] [2022-11-26 01:01:58,591 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:01:58,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:58,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:01:58,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:01:58,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:58,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:58,671 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:01:58,672 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 01:01:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:58,691 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 01:01:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:58,948 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 01:01:58,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:58,977 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 01:01:59,001 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 01:01:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,025 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 01:01:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,082 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 01:01:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,168 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:01:59,169 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 01:01:59,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,201 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 01:01:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,225 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 01:01:59,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,257 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 01:01:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,284 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 01:01:59,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,806 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 01:01:59,807 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 662 treesize of output 671 [2022-11-26 01:01:59,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:01:59,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:01:59,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:00,107 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-26 01:02:00,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 688 treesize of output 691 [2022-11-26 01:02:00,376 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-26 01:02:00,377 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 648 treesize of output 678 [2022-11-26 01:02:00,517 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-26 01:02:00,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 641 treesize of output 652 [2022-11-26 01:02:00,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:02:00,582 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 01:02:00,583 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 678 treesize of output 631 [2022-11-26 01:02:00,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 631 [2022-11-26 01:03:05,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:05,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 01:03:06,480 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 01:03:06,490 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 01:03:06,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:06,512 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 01:03:06,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:06,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:06,531 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 53 treesize of output 23 [2022-11-26 01:03:06,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:06,552 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 01:03:06,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:06,570 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 01:03:06,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:06,598 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 01:03:06,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:06,614 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 01:03:06,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:06,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:06,626 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 01:03:06,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:06,644 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 01:03:07,518 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 49 for LOIs [2022-11-26 01:03:07,550 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 25 for LOIs [2022-11-26 01:03:08,422 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-26 01:03:08,424 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:03:08,443 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:03:08,509 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:15,049 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8578#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103| Int)) (and (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24)))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24))) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_103|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_103|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-26 01:03:15,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:15,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:15,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 16 [2022-11-26 01:03:15,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583095560] [2022-11-26 01:03:15,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:15,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 01:03:15,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:15,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 01:03:15,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 01:03:15,052 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-26 01:03:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:15,414 INFO L93 Difference]: Finished difference Result 261 states and 321 transitions. [2022-11-26 01:03:15,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:03:15,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 63 [2022-11-26 01:03:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:15,416 INFO L225 Difference]: With dead ends: 261 [2022-11-26 01:03:15,416 INFO L226 Difference]: Without dead ends: 154 [2022-11-26 01:03:15,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 01:03:15,418 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:15,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 554 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:03:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-26 01:03:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2022-11-26 01:03:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 94 states have internal predecessors, (107), 28 states have call successors, (28), 14 states have call predecessors, (28), 18 states have return successors, (30), 25 states have call predecessors, (30), 26 states have call successors, (30) [2022-11-26 01:03:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 165 transitions. [2022-11-26 01:03:15,473 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 165 transitions. Word has length 63 [2022-11-26 01:03:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:15,474 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 165 transitions. [2022-11-26 01:03:15,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 10 states have (on average 4.1) internal successors, (41), 12 states have internal predecessors, (41), 5 states have call successors, (12), 2 states have call predecessors, (12), 8 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-26 01:03:15,474 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 165 transitions. [2022-11-26 01:03:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-26 01:03:15,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:15,476 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:03:15,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:15,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 01:03:15,683 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:15,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:15,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1966738942, now seen corresponding path program 1 times [2022-11-26 01:03:15,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:15,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630743395] [2022-11-26 01:03:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:15,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-26 01:03:16,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:16,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630743395] [2022-11-26 01:03:16,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630743395] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:16,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510776885] [2022-11-26 01:03:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:16,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:16,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:16,002 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:16,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 01:03:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:16,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-26 01:03:16,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:18,496 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43| Int)) (not (= (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0))) (exists ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43| Int) (|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43| Int)) (not (= (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_43|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_43|) 0)))) is different from true [2022-11-26 01:03:19,343 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-26 01:03:19,343 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 30 [2022-11-26 01:03:19,352 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-26 01:03:19,352 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 29 treesize of output 1 [2022-11-26 01:03:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-11-26 01:03:19,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:19,976 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-26 01:03:19,976 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 24 treesize of output 23 [2022-11-26 01:03:19,987 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-26 01:03:19,988 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 20 treesize of output 12 [2022-11-26 01:03:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 01:03:20,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510776885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:20,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [74171701] [2022-11-26 01:03:20,017 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:03:20,017 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:20,018 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:20,018 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:20,018 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,088 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-26 01:03:20,088 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 46 [2022-11-26 01:03:20,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,150 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:03:20,150 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 01:03:20,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,348 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 01:03:20,372 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 01:03:20,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,392 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 01:03:20,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,417 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 01:03:20,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,467 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 01:03:20,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:20,512 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:03:20,513 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 01:03:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,616 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:03:20,616 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 01:03:20,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,649 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 01:03:20,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,667 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 01:03:20,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:20,706 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 01:03:20,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,778 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 01:03:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,804 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 01:03:20,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,820 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 01:03:20,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,841 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 01:03:20,864 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 01:03:20,879 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 01:03:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,908 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 01:03:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,928 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 01:03:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,946 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 01:03:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:20,959 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 01:03:23,274 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-26 01:03:23,297 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 01:03:24,121 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 01:03:24,123 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:03:24,141 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:03:24,207 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:03:33,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9599#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125| Int)) (and (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24)) 0) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_125| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_125|))) (= |#NULL.base| 0))' at error location [2022-11-26 01:03:33,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:33,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:33,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17, 14] total 30 [2022-11-26 01:03:33,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331737530] [2022-11-26 01:03:33,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:33,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 01:03:33,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:33,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 01:03:33,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2833, Unknown=1, NotChecked=108, Total=3192 [2022-11-26 01:03:33,344 INFO L87 Difference]: Start difference. First operand 134 states and 165 transitions. Second operand has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-26 01:03:35,611 WARN L539 Checker$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 01:03:37,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:03:39,725 WARN L539 Checker$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 01:03:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:03:43,089 INFO L93 Difference]: Finished difference Result 396 states and 486 transitions. [2022-11-26 01:03:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-26 01:03:43,089 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) Word has length 65 [2022-11-26 01:03:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:03:43,091 INFO L225 Difference]: With dead ends: 396 [2022-11-26 01:03:43,092 INFO L226 Difference]: Without dead ends: 255 [2022-11-26 01:03:43,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=892, Invalid=7853, Unknown=1, NotChecked=184, Total=8930 [2022-11-26 01:03:43,095 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 187 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 68 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:03:43,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 531 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1273 Invalid, 3 Unknown, 137 Unchecked, 7.3s Time] [2022-11-26 01:03:43,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-26 01:03:43,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 172. [2022-11-26 01:03:43,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 117 states have (on average 1.205128205128205) internal successors, (141), 121 states have internal predecessors, (141), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-26 01:03:43,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 207 transitions. [2022-11-26 01:03:43,187 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 207 transitions. Word has length 65 [2022-11-26 01:03:43,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:03:43,188 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 207 transitions. [2022-11-26 01:03:43,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 13 states have call successors, (25), 4 states have call predecessors, (25), 9 states have return successors, (25), 11 states have call predecessors, (25), 13 states have call successors, (25) [2022-11-26 01:03:43,188 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 207 transitions. [2022-11-26 01:03:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 01:03:43,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:03:43,189 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 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] [2022-11-26 01:03:43,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 01:03:43,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:43,397 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:03:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:03:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1008273620, now seen corresponding path program 2 times [2022-11-26 01:03:43,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:03:43,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064350645] [2022-11-26 01:03:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:03:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:03:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:03:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:03:44,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:03:44,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064350645] [2022-11-26 01:03:44,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064350645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:03:44,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291457968] [2022-11-26 01:03:44,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:03:44,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:03:44,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:03:44,679 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:03:44,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 01:03:45,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 01:03:45,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:03:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-26 01:03:45,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:03:45,060 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-26 01:03:45,060 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 21 treesize of output 25 [2022-11-26 01:03:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:03:50,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:03:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-26 01:03:54,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291457968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:03:54,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1781310665] [2022-11-26 01:03:54,468 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:03:54,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:03:54,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:03:54,469 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:03:54,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:03:54,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,532 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:03:54,533 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 01:03:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,550 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 01:03:54,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,753 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 01:03:54,775 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 01:03:54,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,794 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 01:03:54,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,833 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 01:03:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,884 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 01:03:54,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,969 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 01:03:54,969 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 01:03:54,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:55,032 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:03:55,032 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 01:03:55,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:55,095 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:03:55,096 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 01:03:55,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,201 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:03:55,202 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 01:03:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,239 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 01:03:55,302 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 01:03:55,321 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 01:03:55,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:55,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,343 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 01:03:55,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,413 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 01:03:55,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,436 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 01:03:55,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,453 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 01:03:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,505 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 01:03:55,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,530 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 01:03:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,553 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 01:03:55,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:03:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,568 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 01:03:55,581 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 01:03:55,594 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 01:03:55,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,622 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 01:03:55,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,649 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 01:03:55,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,666 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 01:03:55,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:03:55,678 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 01:03:57,183 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2022-11-26 01:03:57,203 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 01:03:57,839 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 01:03:57,841 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:03:57,856 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:03:57,916 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:04:08,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10940#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24)) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147|) (= (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 16) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_147| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_147|))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:04:08,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:04:08,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:04:08,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 7] total 25 [2022-11-26 01:04:08,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605265261] [2022-11-26 01:04:08,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:04:08,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:04:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:04:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:04:08,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=2452, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 01:04:08,166 INFO L87 Difference]: Start difference. First operand 172 states and 207 transitions. Second operand has 25 states, 23 states have (on average 3.0) internal successors, (69), 25 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-26 01:04:11,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:13,451 WARN L539 Checker$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 01:04:15,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:04:17,571 WARN L539 Checker$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 01:04:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:23,691 INFO L93 Difference]: Finished difference Result 299 states and 366 transitions. [2022-11-26 01:04:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 01:04:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.0) internal successors, (69), 25 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 66 [2022-11-26 01:04:23,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:23,693 INFO L225 Difference]: With dead ends: 299 [2022-11-26 01:04:23,693 INFO L226 Difference]: Without dead ends: 233 [2022-11-26 01:04:23,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 155 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=425, Invalid=4977, Unknown=0, NotChecked=0, Total=5402 [2022-11-26 01:04:23,696 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 181 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 247 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:23,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 415 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1280 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2022-11-26 01:04:23,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-26 01:04:23,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 173. [2022-11-26 01:04:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 118 states have (on average 1.194915254237288) internal successors, (141), 122 states have internal predecessors, (141), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-26 01:04:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 207 transitions. [2022-11-26 01:04:23,785 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 207 transitions. Word has length 66 [2022-11-26 01:04:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:23,786 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 207 transitions. [2022-11-26 01:04:23,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.0) internal successors, (69), 25 states have internal predecessors, (69), 11 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2022-11-26 01:04:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 207 transitions. [2022-11-26 01:04:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 01:04:23,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:23,788 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 01:04:23,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:23,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 01:04:23,994 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:23,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1776148813, now seen corresponding path program 1 times [2022-11-26 01:04:23,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:23,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078300340] [2022-11-26 01:04:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:23,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:26,467 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 01:04:26,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078300340] [2022-11-26 01:04:26,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078300340] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:26,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311768357] [2022-11-26 01:04:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:26,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:26,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:26,469 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:26,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 01:04:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:26,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-26 01:04:26,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:30,398 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 01:04:30,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:37,154 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse1 (+ 8 .cse2))) (or (not (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))) (and (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|) (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (not (<= (mod |c_aws_linked_list_node_next_is_valid_#res| 256) 0)) (and (= .cse2 0) (= .cse0 0)) (not (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) |c_aws_linked_list_node_next_is_valid_#in~node.base|)) (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| Int)) (let ((.cse3 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|)) (.cse5 (+ .cse3 8))) (or (= .cse3 0) (not (= (select (select |c_#memory_$Pointer$.offset| .cse4) .cse5) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| (select (select |c_#memory_$Pointer$.base| .cse4) .cse5))))))) (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67| Int)) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|)) (.cse7 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|) 8))) (or (= .cse6 0) (not (= (select (select |c_#memory_$Pointer$.offset| .cse6) .cse7) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| (select (select |c_#memory_$Pointer$.base| .cse6) .cse7)))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| Int)) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|)) (.cse9 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|) 8))) (or (= .cse8 0) (not (= (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| (select (select |c_#memory_$Pointer$.base| .cse8) .cse9)))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67| Int)) (let ((.cse10 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|))) (let ((.cse11 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|)) (.cse12 (+ .cse10 8))) (or (= .cse10 0) (not (= (select (select |c_#memory_$Pointer$.offset| .cse11) .cse12) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_67|)) (not (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_67| (select (select |c_#memory_$Pointer$.base| .cse11) .cse12))))))))))))) is different from false [2022-11-26 01:04:39,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311768357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:39,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697783954] [2022-11-26 01:04:39,725 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:04:39,725 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:04:39,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:04:39,726 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:04:39,726 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:04:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:39,848 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:04:39,849 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 01:04:39,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:39,870 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 01:04:40,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,095 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 01:04:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,127 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 01:04:40,158 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 24 treesize of output 9 [2022-11-26 01:04:40,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,185 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 01:04:40,231 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 01:04:40,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,260 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 01:04:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,287 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 01:04:40,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:04:40,321 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 01:04:49,813 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 144 for LOIs [2022-11-26 01:04:50,064 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 01:04:50,746 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-11-26 01:04:50,786 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:04:50,803 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:04:50,866 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:22,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12010#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (= 0 (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) |~#s_can_fail_allocator_static~0.offset|)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| Int)) (and (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 0)) (< |#StackHeapBarrier| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 1) (= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 2)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 4)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0) 3)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 8) 0) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 16) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 24)) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_96|) 0)) 32))) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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) (= |#NULL.offset| 0) (= (select (select |#memory_int| 1) 0) 48) (= 40 (select |#length| 4)) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:05:22,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:05:22,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:05:22,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 29] total 41 [2022-11-26 01:05:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34358272] [2022-11-26 01:05:22,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:05:22,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-26 01:05:22,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:22,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-26 01:05:22,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=5268, Unknown=1, NotChecked=148, Total=5852 [2022-11-26 01:05:22,075 INFO L87 Difference]: Start difference. First operand 173 states and 207 transitions. Second operand has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 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 01:05:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:31,238 INFO L93 Difference]: Finished difference Result 269 states and 325 transitions. [2022-11-26 01:05:31,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 01:05:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 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 01:05:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:31,241 INFO L225 Difference]: With dead ends: 269 [2022-11-26 01:05:31,241 INFO L226 Difference]: Without dead ends: 229 [2022-11-26 01:05:31,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 41.4s TimeCoverageRelationStatistics Valid=854, Invalid=9049, Unknown=1, NotChecked=196, Total=10100 [2022-11-26 01:05:31,244 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 278 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:31,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 669 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-26 01:05:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-26 01:05:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 173. [2022-11-26 01:05:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 122 states have internal predecessors, (139), 33 states have call successors, (33), 19 states have call predecessors, (33), 21 states have return successors, (33), 31 states have call predecessors, (33), 31 states have call successors, (33) [2022-11-26 01:05:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 205 transitions. [2022-11-26 01:05:31,352 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 205 transitions. Word has length 67 [2022-11-26 01:05:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:31,353 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 205 transitions. [2022-11-26 01:05:31,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 34 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 01:05:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 205 transitions. [2022-11-26 01:05:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 01:05:31,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:31,354 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 01:05:31,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 01:05:31,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:05:31,561 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:31,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:31,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1989271983, now seen corresponding path program 1 times [2022-11-26 01:05:31,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:31,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135014448] [2022-11-26 01:05:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:31,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-26 01:05:31,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135014448] [2022-11-26 01:05:31,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135014448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:05:31,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:05:31,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-26 01:05:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551470328] [2022-11-26 01:05:31,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:05:31,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:05:31,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:05:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:05:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:05:31,901 INFO L87 Difference]: Start difference. First operand 173 states and 205 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-26 01:05:32,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:05:32,424 INFO L93 Difference]: Finished difference Result 195 states and 228 transitions. [2022-11-26 01:05:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:05:32,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 70 [2022-11-26 01:05:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:05:32,425 INFO L225 Difference]: With dead ends: 195 [2022-11-26 01:05:32,426 INFO L226 Difference]: Without dead ends: 193 [2022-11-26 01:05:32,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-26 01:05:32,426 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:05:32,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:05:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-26 01:05:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2022-11-26 01:05:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 128 states have internal predecessors, (145), 35 states have call successors, (35), 21 states have call predecessors, (35), 23 states have return successors, (35), 33 states have call predecessors, (35), 33 states have call successors, (35) [2022-11-26 01:05:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 215 transitions. [2022-11-26 01:05:32,561 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 215 transitions. Word has length 70 [2022-11-26 01:05:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:05:32,561 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 215 transitions. [2022-11-26 01:05:32,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-26 01:05:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 215 transitions. [2022-11-26 01:05:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 01:05:32,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:05:32,564 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 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] [2022-11-26 01:05:32,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-26 01:05:32,564 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:05:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:05:32,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2027580686, now seen corresponding path program 2 times [2022-11-26 01:05:32,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:05:32,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559520347] [2022-11-26 01:05:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:05:32,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:05:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:05:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:05:34,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:05:34,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559520347] [2022-11-26 01:05:34,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559520347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:05:34,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522597292] [2022-11-26 01:05:34,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:05:34,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:05:34,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:05:34,831 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:05:34,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 01:05:35,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:05:35,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:05:35,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-26 01:05:35,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:06:00,739 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:06:01,104 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 01:06:01,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:06:02,640 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:06:02,640 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 26 treesize of output 29 [2022-11-26 01:06:02,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:06:02,666 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 24 treesize of output 27 [2022-11-26 01:06:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 01:06:02,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522597292] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:06:02,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1844432204] [2022-11-26 01:06:02,850 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:06:02,850 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:06:02,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:06:02,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:06:02,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:06:02,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:02,979 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:06:02,979 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 01:06:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,000 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 01:06:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,219 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 01:06:03,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,251 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 01:06:03,277 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 01:06:03,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,305 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 01:06:03,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,354 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 01:06:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,391 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 01:06:03,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,429 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 01:06:03,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:06:03,469 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 01:06:12,520 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 144 for LOIs [2022-11-26 01:06:12,738 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 01:06:13,434 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 134 for LOIs [2022-11-26 01:06:13,475 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:06:13,491 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:06:13,552 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:06:42,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13767#(and (= |#funAddr~s_can_fail_realloc_allocator.offset| (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 16))) (= (select |#length| 3) 12) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191| Int)) (and (= 32 (select |#length| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) (< |#StackHeapBarrier| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 8) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 16) 0) (not (= 3 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (not (= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 16) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) 16) (= (select |#valid| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 1) (not (= 2 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (not (= 4 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24) 0) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 24)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|) 8) 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_191|))) (= 0 (select (select |#memory_$Pointer$.offset| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32))) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= |~#s_can_fail_allocator_static~0.base| 4) (= |#funAddr~s_can_fail_malloc_allocator.base| (select (select |#memory_$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$.base| |~#s_can_fail_allocator_static~0.base|) (+ |~#s_can_fail_allocator_static~0.offset| 32)) 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (= 32 (select |#length| 2)) (= (select |#valid| 4) 1) (= |#funAddr~s_can_fail_calloc_allocator.base| (select (select |#memory_$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)) (<= 0 |#NULL.offset|) (= (select (select |#memory_int| 1) 1) 0) (< 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-26 01:06:42,504 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:06:42,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:06:42,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 13] total 36 [2022-11-26 01:06:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334007243] [2022-11-26 01:06:42,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:06:42,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 01:06:42,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:06:42,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 01:06:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3631, Unknown=7, NotChecked=0, Total=4032 [2022-11-26 01:06:42,507 INFO L87 Difference]: Start difference. First operand 183 states and 215 transitions. Second operand has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-26 01:07:03,062 WARN L233 SmtUtils]: Spent 20.09s on a formula simplification. DAG size of input: 45 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:13,224 WARN L233 SmtUtils]: Spent 10.04s 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 01:07:23,383 WARN L233 SmtUtils]: Spent 10.05s 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 01:07:33,532 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:07:53,796 WARN L233 SmtUtils]: Spent 20.13s on a formula simplification. DAG size of input: 50 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:04,213 WARN L233 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:25,287 WARN L233 SmtUtils]: Spent 20.12s on a formula simplification. DAG size of input: 54 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:08:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:26,784 INFO L93 Difference]: Finished difference Result 277 states and 323 transitions. [2022-11-26 01:08:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 01:08:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) Word has length 73 [2022-11-26 01:08:26,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:26,786 INFO L225 Difference]: With dead ends: 277 [2022-11-26 01:08:26,786 INFO L226 Difference]: Without dead ends: 200 [2022-11-26 01:08:26,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 175 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 157.0s TimeCoverageRelationStatistics Valid=603, Invalid=5396, Unknown=7, NotChecked=0, Total=6006 [2022-11-26 01:08:26,789 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 172 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:26,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 878 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-26 01:08:26,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-26 01:08:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 172. [2022-11-26 01:08:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 120 states have internal predecessors, (131), 32 states have call successors, (32), 21 states have call predecessors, (32), 22 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-26 01:08:26,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 194 transitions. [2022-11-26 01:08:26,920 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 194 transitions. Word has length 73 [2022-11-26 01:08:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:26,920 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 194 transitions. [2022-11-26 01:08:26,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.757575757575758) internal successors, (91), 35 states have internal predecessors, (91), 17 states have call successors, (31), 4 states have call predecessors, (31), 8 states have return successors, (30), 15 states have call predecessors, (30), 16 states have call successors, (30) [2022-11-26 01:08:26,921 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 194 transitions. [2022-11-26 01:08:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-26 01:08:26,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:26,922 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-26 01:08:26,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 01:08:27,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 01:08:27,130 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:27,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1259967279, now seen corresponding path program 1 times [2022-11-26 01:08:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:27,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434042338] [2022-11-26 01:08:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-26 01:08:27,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434042338] [2022-11-26 01:08:27,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434042338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:08:27,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:08:27,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:08:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761318420] [2022-11-26 01:08:27,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:08:27,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:08:27,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:08:27,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:08:27,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:08:27,555 INFO L87 Difference]: Start difference. First operand 172 states and 194 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 01:08:27,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:08:27,994 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2022-11-26 01:08:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:08:27,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2022-11-26 01:08:27,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:08:27,996 INFO L225 Difference]: With dead ends: 182 [2022-11-26 01:08:27,996 INFO L226 Difference]: Without dead ends: 180 [2022-11-26 01:08:27,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 01:08:27,997 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:08:27,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:08:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-26 01:08:28,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-11-26 01:08:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 123 states have (on average 1.113821138211382) internal successors, (137), 126 states have internal predecessors, (137), 32 states have call successors, (32), 23 states have call predecessors, (32), 24 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-11-26 01:08:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 200 transitions. [2022-11-26 01:08:28,126 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 200 transitions. Word has length 76 [2022-11-26 01:08:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:08:28,127 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 200 transitions. [2022-11-26 01:08:28,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-26 01:08:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 200 transitions. [2022-11-26 01:08:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 01:08:28,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:08:28,128 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 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] [2022-11-26 01:08:28,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-26 01:08:28,129 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:08:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:08:28,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1891220550, now seen corresponding path program 1 times [2022-11-26 01:08:28,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:08:28,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850328822] [2022-11-26 01:08:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:28,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:08:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 01:08:33,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:08:33,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850328822] [2022-11-26 01:08:33,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850328822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:08:33,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100951702] [2022-11-26 01:08:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:08:33,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:08:33,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:08:33,143 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:08:33,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f6fb44a-9231-48a6-a465-1938b6c5c2af/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 01:08:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:08:33,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 152 conjunts are in the unsatisfiable core [2022-11-26 01:08:33,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:08:33,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:33,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:08:33,949 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 27 treesize of output 15 [2022-11-26 01:08:33,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:33,973 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-26 01:08:33,983 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 8 treesize of output 7 [2022-11-26 01:08:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:33,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 18 [2022-11-26 01:08:34,160 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-26 01:08:34,160 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 142 treesize of output 106 [2022-11-26 01:08:34,197 INFO L321 Elim1Store]: treesize reduction 52, result has 8.8 percent of original size [2022-11-26 01:08:34,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 111 [2022-11-26 01:08:34,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:34,215 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 87 treesize of output 77 [2022-11-26 01:08:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:34,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:34,230 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-26 01:08:34,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:34,242 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 33 treesize of output 31 [2022-11-26 01:08:34,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:34,248 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 16 treesize of output 20 [2022-11-26 01:08:34,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:34,264 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 18 treesize of output 26 [2022-11-26 01:08:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:08:34,274 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 18 treesize of output 26 [2022-11-26 01:08:34,286 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 01:08:34,297 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 24 treesize of output 13 [2022-11-26 01:08:34,303 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 13 treesize of output 9 [2022-11-26 01:08:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 43 proven. 43 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 01:08:41,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:08:51,005 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse12 (select (select |c_#memory_$Pointer$.offset| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|))) (let ((.cse10 (select (select |c_#memory_$Pointer$.base| |c_aws_linked_list_node_next_is_valid_#in~node.base|) |c_aws_linked_list_node_next_is_valid_#in~node.offset|)) (.cse11 (+ 8 .cse12))) (or (and (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92|)) (.cse1 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92|) 8))) (or (= .cse0 0) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))) (not (= (select (select |c_#memory_$Pointer$.base| .cse0) .cse1) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|))))) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92| 0))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92| Int)) (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92|))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92|)) (.cse4 (+ .cse2 8))) (or (= .cse2 0) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4))) (not (= (select (select |c_#memory_$Pointer$.base| .cse3) .cse4) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|)))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| Int)) (or (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| 0) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92| Int)) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92|)) (.cse6 (+ (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92|) 8))) (or (= .cse5 0) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| (select (select |c_#memory_$Pointer$.offset| .cse5) .cse6))) (not (= (select (select |c_#memory_$Pointer$.base| .cse5) .cse6) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|))))))) (forall ((|v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92| Int)) (or (forall ((|v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| Int)) (let ((.cse7 (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92|))) (let ((.cse8 (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|) |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92|)) (.cse9 (+ .cse7 8))) (or (= .cse7 0) (not (= |v_aws_linked_list_is_valid_#in~list#1.offset_BEFORE_CALL_92| (select (select |c_#memory_$Pointer$.offset| .cse8) .cse9))) (not (= (select (select |c_#memory_$Pointer$.base| .cse8) .cse9) |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92|)))))) (= |v_aws_linked_list_is_valid_#in~list#1.base_BEFORE_CALL_92| 0)))) (not (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| (select (select |c_#memory_$Pointer$.offset| .cse10) .cse11))) (and (= 0 |c_aws_linked_list_node_next_is_valid_#in~node.base|) (= |c_aws_linked_list_node_next_is_valid_#in~node.offset| 0)) (not (<= (mod |c_aws_linked_list_node_next_is_valid_#res| 256) 0)) (and (= .cse12 0) (= .cse10 0)) (not (= (select (select |c_#memory_$Pointer$.base| .cse10) .cse11) |c_aws_linked_list_node_next_is_valid_#in~node.base|))))) is different from false [2022-11-26 01:09:23,624 WARN L233 SmtUtils]: Spent 27.15s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:09:24,230 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24))) (and (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= .cse0 0) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (+ .cse0 8)))))) (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse5 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)))) (let ((.cse6 (select (select .cse5 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= (select (select .cse5 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|)) (+ .cse6 8)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) (= .cse6 0))))) (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse8 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)))) (let ((.cse7 (select (select .cse8 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= .cse7 0) (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| (select (select .cse8 .cse7) (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 8))))))) (or (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base| 0)) (and (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1953 Int)) (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0)) (forall ((v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 0))) (not (= |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset| 0))) (forall ((v_ArrVal_1957 Int) (v_ArrVal_1951 (Array Int Int)) (v_ArrVal_1950 (Array Int Int)) (v_ArrVal_1953 Int) (v_ArrVal_1956 Int) (v_ArrVal_1955 Int)) (let ((.cse10 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse2 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1955)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1950) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1956)) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|))) (or (= (let ((.cse9 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| (store .cse4 |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset| v_ArrVal_1953)) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_1951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) .cse3 v_ArrVal_1957)))) (select (select .cse9 .cse10) (+ (select (select .cse9 |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) 8))) |c_ULTIMATE.start_aws_linked_list_begin_harness_~#list~0#1.offset|) (= .cse10 0)))))) is different from false [2022-11-26 01:09:32,552 WARN L233 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 23 DAG size of output: 20 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-26 01:09:32,553 INFO L321 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2022-11-26 01:09:32,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1700 treesize of output 1423 [2022-11-26 01:09:32,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:15,942 WARN L233 SmtUtils]: Spent 43.37s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-26 01:10:15,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:15,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1394 treesize of output 1641 [2022-11-26 01:10:33,329 WARN L233 SmtUtils]: Spent 17.25s on a formula simplification. DAG size of input: 359 DAG size of output: 243 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-26 01:10:33,330 INFO L321 Elim1Store]: treesize reduction 418, result has 61.3 percent of original size [2022-11-26 01:10:33,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 16 new quantified variables, introduced 78 case distinctions, treesize of input 17311 treesize of output 17189 [2022-11-26 01:10:33,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:37,029 INFO L321 Elim1Store]: treesize reduction 195, result has 53.5 percent of original size [2022-11-26 01:10:37,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 16482 treesize of output 11451 [2022-11-26 01:10:38,523 INFO L217 Elim1Store]: Index analysis took 771 ms [2022-11-26 01:10:42,379 INFO L321 Elim1Store]: treesize reduction 260, result has 8.5 percent of original size [2022-11-26 01:10:42,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 16 case distinctions, treesize of input 14660 treesize of output 14533