./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/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_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/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_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/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 fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- 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 00:18:51,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:18:51,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:18:51,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:18:51,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:18:51,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:18:51,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:18:51,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:18:51,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:18:52,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:18:52,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:18:52,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:18:52,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:18:52,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:18:52,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:18:52,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:18:52,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:18:52,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:18:52,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:18:52,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:18:52,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:18:52,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:18:52,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:18:52,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:18:52,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:18:52,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:18:52,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:18:52,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:18:52,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:18:52,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:18:52,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:18:52,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:18:52,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:18:52,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:18:52,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:18:52,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:18:52,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:18:52,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:18:52,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:18:52,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:18:52,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:18:52,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 00:18:52,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:18:52,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:18:52,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:18:52,095 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:18:52,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:18:52,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:18:52,097 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:18:52,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:18:52,097 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:18:52,097 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:18:52,098 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:18:52,099 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:18:52,099 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:18:52,099 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:18:52,099 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:18:52,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:18:52,100 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:18:52,100 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:18:52,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:18:52,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:18:52,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:18:52,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:18:52,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:18:52,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:18:52,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:18:52,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:18:52,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:18:52,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:18:52,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:18:52,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:52,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:18:52,103 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:18:52,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:18:52,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:18:52,104 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:18:52,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:18:52,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:18:52,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:18:52,105 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_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2022-11-26 00:18:52,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:18:52,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:18:52,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:18:52,411 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:18:52,411 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:18:52,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-26 00:18:55,438 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:18:55,873 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:18:55,874 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2022-11-26 00:18:55,907 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/data/3d8ef2928/c384363d656e4c2d8aa576adf2c348e2/FLAG7de703b37 [2022-11-26 00:18:55,922 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/data/3d8ef2928/c384363d656e4c2d8aa576adf2c348e2 [2022-11-26 00:18:55,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:18:55,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:18:55,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:55,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:18:55,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:18:55,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:55" (1/1) ... [2022-11-26 00:18:55,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1acce7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:55, skipping insertion in model container [2022-11-26 00:18:55,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:55" (1/1) ... [2022-11-26 00:18:55,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:18:56,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:18:56,356 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_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-26 00:18:56,367 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_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-26 00:18:57,292 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:18:57,298 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,299 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,299 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,300 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,302 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,317 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,318 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,321 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,322 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,324 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,325 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,326 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,327 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:57,417 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:18:57,418 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:18:57,419 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:18:57,424 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:18:57,426 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:18:57,427 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:18:57,780 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:18:57,782 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:18:57,783 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:18:57,784 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:18:57,786 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:18:57,788 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:18:57,789 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:18:57,790 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:18:57,791 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:18:57,791 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:18:57,792 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:18:58,017 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:18:58,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:58,094 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:18:58,109 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_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2022-11-26 00:18:58,110 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_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2022-11-26 00:18:58,161 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 00:18:58,166 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,166 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,167 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,167 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,168 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,178 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,179 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,180 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,180 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,182 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,183 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,183 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,184 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 00:18:58,193 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:18:58,193 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:18:58,194 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 00:18:58,199 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 00:18:58,201 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 00:18:58,201 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 00:18:58,242 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 00:18:58,243 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 00:18:58,245 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 00:18:58,246 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 00:18:58,247 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 00:18:58,254 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 00:18:58,255 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 00:18:58,256 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 00:18:58,258 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 00:18:58,259 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 00:18:58,260 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 00:18:58,320 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 00:18:58,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:58,602 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:18:58,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58 WrapperNode [2022-11-26 00:18:58,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:58,604 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:58,604 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:18:58,604 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:18:58,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,756 INFO L138 Inliner]: procedures = 679, calls = 1079, calls flagged for inlining = 51, calls inlined = 5, statements flattened = 213 [2022-11-26 00:18:58,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:58,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:18:58,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:18:58,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:18:58,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:18:58,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:18:58,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:18:58,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:18:58,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (1/1) ... [2022-11-26 00:18:58,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:58,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:58,864 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:18:58,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:18:58,912 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2022-11-26 00:18:58,913 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2022-11-26 00:18:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:18:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 00:18:58,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 00:18:58,913 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-26 00:18:58,914 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-26 00:18:58,914 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2022-11-26 00:18:58,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2022-11-26 00:18:58,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:18:58,915 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-26 00:18:58,916 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-26 00:18:58,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:18:58,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 00:18:58,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:18:58,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:18:58,917 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-26 00:18:58,917 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-26 00:18:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 00:18:58,918 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 00:18:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:18:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 00:18:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 00:18:58,918 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-26 00:18:58,919 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-26 00:18:58,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:18:59,230 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:18:59,232 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:18:59,716 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:18:59,915 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:18:59,915 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:18:59,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:59 BoogieIcfgContainer [2022-11-26 00:18:59,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:18:59,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:18:59,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:18:59,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:18:59,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:18:55" (1/3) ... [2022-11-26 00:18:59,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f194a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:59, skipping insertion in model container [2022-11-26 00:18:59,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:58" (2/3) ... [2022-11-26 00:18:59,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f194a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:59, skipping insertion in model container [2022-11-26 00:18:59,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:59" (3/3) ... [2022-11-26 00:18:59,926 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2022-11-26 00:18:59,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:18:59,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:19:00,023 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:19:00,039 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;@3a1e36a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:19:00,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:19:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-26 00:19:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-26 00:19:00,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:00,060 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 2, 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] [2022-11-26 00:19:00,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1308370605, now seen corresponding path program 1 times [2022-11-26 00:19:00,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:00,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635417997] [2022-11-26 00:19:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:00,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:19:01,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:01,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635417997] [2022-11-26 00:19:01,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635417997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:01,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429736424] [2022-11-26 00:19:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:01,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:01,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:01,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:01,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:19:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:01,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-26 00:19:01,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:19:02,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:02,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429736424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:02,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:02,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 9 [2022-11-26 00:19:02,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100946974] [2022-11-26 00:19:02,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:02,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:19:02,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:02,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:19:02,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:19:02,211 INFO L87 Difference]: Start difference. First operand has 89 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 48 states have internal predecessors, (57), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-26 00:19:02,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:02,771 INFO L93 Difference]: Finished difference Result 166 states and 254 transitions. [2022-11-26 00:19:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:19:02,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 62 [2022-11-26 00:19:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:02,783 INFO L225 Difference]: With dead ends: 166 [2022-11-26 00:19:02,783 INFO L226 Difference]: Without dead ends: 87 [2022-11-26 00:19:02,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:19:02,795 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 42 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:02,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 463 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:19:02,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-26 00:19:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-26 00:19:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 43 states have (on average 1.255813953488372) internal successors, (54), 48 states have internal predecessors, (54), 34 states have call successors, (34), 8 states have call predecessors, (34), 9 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2022-11-26 00:19:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 126 transitions. [2022-11-26 00:19:02,882 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 126 transitions. Word has length 62 [2022-11-26 00:19:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:02,883 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 126 transitions. [2022-11-26 00:19:02,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 4 states have (on average 6.25) internal successors, (25), 6 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-26 00:19:02,883 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 126 transitions. [2022-11-26 00:19:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 00:19:02,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:02,889 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 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, 1, 1] [2022-11-26 00:19:02,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:03,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 00:19:03,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash -825605775, now seen corresponding path program 1 times [2022-11-26 00:19:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:03,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722287874] [2022-11-26 00:19:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:03,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:19:03,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:03,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722287874] [2022-11-26 00:19:03,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722287874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:03,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929639332] [2022-11-26 00:19:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:03,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:03,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:03,670 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:03,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:19:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:19:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:19:04,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:04,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929639332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:04,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:04,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2022-11-26 00:19:04,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286788107] [2022-11-26 00:19:04,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:04,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:19:04,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:04,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:19:04,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:19:04,274 INFO L87 Difference]: Start difference. First operand 87 states and 126 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 00:19:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:04,784 INFO L93 Difference]: Finished difference Result 163 states and 243 transitions. [2022-11-26 00:19:04,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:19:04,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 64 [2022-11-26 00:19:04,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:04,792 INFO L225 Difference]: With dead ends: 163 [2022-11-26 00:19:04,792 INFO L226 Difference]: Without dead ends: 90 [2022-11-26 00:19:04,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 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 00:19:04,798 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 64 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:04,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 427 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:19:04,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-26 00:19:04,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-26 00:19:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 51 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-26 00:19:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 132 transitions. [2022-11-26 00:19:04,825 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 132 transitions. Word has length 64 [2022-11-26 00:19:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:04,826 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 132 transitions. [2022-11-26 00:19:04,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 00:19:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 132 transitions. [2022-11-26 00:19:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-26 00:19:04,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:04,828 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 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, 1, 1, 1, 1] [2022-11-26 00:19:04,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:05,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:05,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:05,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:05,037 INFO L85 PathProgramCache]: Analyzing trace with hash -2097948773, now seen corresponding path program 1 times [2022-11-26 00:19:05,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:05,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429835316] [2022-11-26 00:19:05,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:05,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:19:05,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:05,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429835316] [2022-11-26 00:19:05,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429835316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:05,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992672094] [2022-11-26 00:19:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:05,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:05,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:05,570 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:19:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:06,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:19:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:19:06,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:06,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992672094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:06,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:06,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-26 00:19:06,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199965936] [2022-11-26 00:19:06,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:06,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:19:06,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:19:06,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:19:06,172 INFO L87 Difference]: Start difference. First operand 90 states and 132 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 00:19:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:06,714 INFO L93 Difference]: Finished difference Result 178 states and 274 transitions. [2022-11-26 00:19:06,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:19:06,716 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 66 [2022-11-26 00:19:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:06,719 INFO L225 Difference]: With dead ends: 178 [2022-11-26 00:19:06,719 INFO L226 Difference]: Without dead ends: 102 [2022-11-26 00:19:06,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:19:06,721 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 94 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:06,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 499 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:19:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-26 00:19:06,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2022-11-26 00:19:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 53 states have internal predecessors, (59), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-26 00:19:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 135 transitions. [2022-11-26 00:19:06,740 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 135 transitions. Word has length 66 [2022-11-26 00:19:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:06,741 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 135 transitions. [2022-11-26 00:19:06,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 00:19:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 135 transitions. [2022-11-26 00:19:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:19:06,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:06,743 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1] [2022-11-26 00:19:06,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:06,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:06,952 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:06,952 INFO L85 PathProgramCache]: Analyzing trace with hash -921720928, now seen corresponding path program 1 times [2022-11-26 00:19:06,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:06,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301734912] [2022-11-26 00:19:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:06,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:19:07,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:07,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301734912] [2022-11-26 00:19:07,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301734912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:07,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320562146] [2022-11-26 00:19:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:07,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:07,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:07,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:07,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:19:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:19:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:19:08,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:08,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320562146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:08,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:08,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-11-26 00:19:08,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927688325] [2022-11-26 00:19:08,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:08,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:19:08,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:08,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:19:08,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:19:08,156 INFO L87 Difference]: Start difference. First operand 92 states and 135 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-26 00:19:08,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:08,225 INFO L93 Difference]: Finished difference Result 179 states and 282 transitions. [2022-11-26 00:19:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:19:08,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-11-26 00:19:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:08,230 INFO L225 Difference]: With dead ends: 179 [2022-11-26 00:19:08,231 INFO L226 Difference]: Without dead ends: 101 [2022-11-26 00:19:08,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:19:08,234 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:08,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:19:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-26 00:19:08,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 93. [2022-11-26 00:19:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.25) internal successors, (60), 54 states have internal predecessors, (60), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-26 00:19:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 136 transitions. [2022-11-26 00:19:08,271 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 136 transitions. Word has length 67 [2022-11-26 00:19:08,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:08,273 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 136 transitions. [2022-11-26 00:19:08,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-26 00:19:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 136 transitions. [2022-11-26 00:19:08,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 00:19:08,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:08,278 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:08,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:08,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:08,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:08,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1389593974, now seen corresponding path program 1 times [2022-11-26 00:19:08,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:08,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838651388] [2022-11-26 00:19:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:08,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:19:09,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:09,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838651388] [2022-11-26 00:19:09,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838651388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:09,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48089542] [2022-11-26 00:19:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:09,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:09,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:09,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:09,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:19:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:09,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:19:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:19:09,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:19:09,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48089542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:09,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:19:09,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 10 [2022-11-26 00:19:09,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440162262] [2022-11-26 00:19:09,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:09,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:19:09,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:09,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:19:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:19:09,760 INFO L87 Difference]: Start difference. First operand 93 states and 136 transitions. Second operand has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 00:19:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:10,283 INFO L93 Difference]: Finished difference Result 178 states and 269 transitions. [2022-11-26 00:19:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:19:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2022-11-26 00:19:10,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:10,285 INFO L225 Difference]: With dead ends: 178 [2022-11-26 00:19:10,285 INFO L226 Difference]: Without dead ends: 99 [2022-11-26 00:19:10,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:19:10,287 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 39 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:10,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 555 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:19:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-26 00:19:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-11-26 00:19:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 55 states have internal predecessors, (61), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2022-11-26 00:19:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 137 transitions. [2022-11-26 00:19:10,302 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 137 transitions. Word has length 70 [2022-11-26 00:19:10,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:10,303 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 137 transitions. [2022-11-26 00:19:10,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 6.2) internal successors, (31), 7 states have internal predecessors, (31), 5 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-26 00:19:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 137 transitions. [2022-11-26 00:19:10,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-11-26 00:19:10,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:10,304 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:10,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:10,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:10,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:10,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1370238580, now seen corresponding path program 1 times [2022-11-26 00:19:10,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:10,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253483801] [2022-11-26 00:19:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:10,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:19:12,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:12,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253483801] [2022-11-26 00:19:12,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253483801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:12,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300567017] [2022-11-26 00:19:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:12,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:12,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:12,424 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:12,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:19:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:13,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-26 00:19:13,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:19:16,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:19:16,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300567017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1340890794] [2022-11-26 00:19:16,911 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-26 00:19:16,911 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:19:16,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:19:16,921 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:19:16,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:19:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,189 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-26 00:19:17,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-26 00:19:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-11-26 00:19:17,366 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 00:19:17,375 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 00:19:17,399 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 00:19:17,412 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 00:19:17,431 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 48 treesize of output 41 [2022-11-26 00:19:17,449 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 00:19:17,461 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 52 treesize of output 43 [2022-11-26 00:19:17,484 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 00:19:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-26 00:19:17,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:19:17,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:19:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:19:17,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:19:17,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-26 00:19:17,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:19:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:17,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:19:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 37 treesize of output 15 [2022-11-26 00:19:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 13 [2022-11-26 00:19:18,145 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:19:18,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 37 treesize of output 15 [2022-11-26 00:19:18,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 13 [2022-11-26 00:19:18,396 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:19:18,566 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:19:18,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 00:19:18,613 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 00:19:18,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-26 00:19:26,668 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 165 for LOIs [2022-11-26 00:19:29,017 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 22 for LOIs [2022-11-26 00:19:29,097 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 00:19:29,109 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 00:19:29,131 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 00:19:29,145 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 00:19:29,170 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 00:19:29,181 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 48 treesize of output 41 [2022-11-26 00:19:29,198 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 52 treesize of output 43 [2022-11-26 00:19:29,216 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 00:19:29,234 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 00:19:29,236 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2022-11-26 00:19:29,238 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:19:29,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:19:38,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1340890794] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:19:38,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:19:38,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [9, 9, 6] total 42 [2022-11-26 00:19:38,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675212164] [2022-11-26 00:19:38,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:19:38,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:19:38,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:19:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:19:38,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1554, Unknown=1, NotChecked=0, Total=1722 [2022-11-26 00:19:38,144 INFO L87 Difference]: Start difference. First operand 94 states and 137 transitions. Second operand has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-26 00:19:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:45,701 INFO L93 Difference]: Finished difference Result 223 states and 321 transitions. [2022-11-26 00:19:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:19:45,702 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 72 [2022-11-26 00:19:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:45,704 INFO L225 Difference]: With dead ends: 223 [2022-11-26 00:19:45,704 INFO L226 Difference]: Without dead ends: 127 [2022-11-26 00:19:45,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=274, Invalid=2275, Unknown=1, NotChecked=0, Total=2550 [2022-11-26 00:19:45,707 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 161 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:45,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 693 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-26 00:19:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-26 00:19:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-11-26 00:19:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 73 states have internal predecessors, (81), 39 states have call successors, (39), 10 states have call predecessors, (39), 13 states have return successors, (49), 37 states have call predecessors, (49), 37 states have call successors, (49) [2022-11-26 00:19:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2022-11-26 00:19:45,740 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2022-11-26 00:19:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:45,740 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2022-11-26 00:19:45,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-26 00:19:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2022-11-26 00:19:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:19:45,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:45,742 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:45,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 00:19:45,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:45,950 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:45,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:45,951 INFO L85 PathProgramCache]: Analyzing trace with hash -782095385, now seen corresponding path program 1 times [2022-11-26 00:19:45,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:19:45,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663936303] [2022-11-26 00:19:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:45,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:19:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:19:46,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:19:46,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663936303] [2022-11-26 00:19:46,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663936303] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:19:46,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961669534] [2022-11-26 00:19:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:46,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:46,408 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:46,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:19:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:47,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-26 00:19:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:47,567 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 15 treesize of output 7 [2022-11-26 00:19:47,572 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 17 treesize of output 9 [2022-11-26 00:19:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:19:47,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:47,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:47,902 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 00:19:47,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:47,916 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 00:19:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:19:48,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961669534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:48,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222093397] [2022-11-26 00:19:48,058 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-26 00:19:48,058 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:19:48,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:19:48,058 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:19:48,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:19:48,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,199 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-26 00:19:48,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-26 00:19:48,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-11-26 00:19:48,302 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 00:19:48,310 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 00:19:48,316 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 00:19:48,333 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 00:19:48,346 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 52 treesize of output 43 [2022-11-26 00:19:48,389 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 00:19:48,402 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 00:19:48,411 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 48 treesize of output 41 [2022-11-26 00:19:48,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-26 00:19:48,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:19:48,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:19:48,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:19:48,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:19:48,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:19:48,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:19:48,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-26 00:19:48,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 37 treesize of output 15 [2022-11-26 00:19:48,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:48,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 35 treesize of output 13 [2022-11-26 00:19:48,901 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:19:49,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:49,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 31 [2022-11-26 00:19:49,082 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-26 00:19:49,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 18 [2022-11-26 00:19:49,099 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-26 00:19:49,251 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-26 00:19:49,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 00:19:49,288 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 00:19:49,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-26 00:20:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:05,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:05,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:10,805 INFO L321 Elim1Store]: treesize reduction 4691, result has 0.0 percent of original size [2022-11-26 00:20:10,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 24 select indices, 24 select index equivalence classes, 12 disjoint index pairs (out of 276 index pairs), introduced 29 new quantified variables, introduced 302 case distinctions, treesize of input 3537 treesize of output 1 [2022-11-26 00:20:17,324 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 200 for LOIs [2022-11-26 00:20:18,469 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 19 for LOIs [2022-11-26 00:20:19,252 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 22 for LOIs [2022-11-26 00:20:19,319 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 00:20:19,332 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 00:20:19,345 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 00:20:19,370 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 00:20:19,389 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 52 treesize of output 43 [2022-11-26 00:20:19,414 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 00:20:19,424 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 48 treesize of output 41 [2022-11-26 00:20:19,452 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 00:20:19,464 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 40 for LOIs [2022-11-26 00:20:19,477 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 15 for LOIs [2022-11-26 00:20:19,482 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:20:19,552 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:20:39,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1222093397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:20:39,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:20:39,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [5, 12, 9] total 48 [2022-11-26 00:20:39,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610599837] [2022-11-26 00:20:39,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:20:39,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:20:39,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:20:39,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:20:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:20:39,342 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-26 00:20:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:20:46,741 INFO L93 Difference]: Finished difference Result 236 states and 335 transitions. [2022-11-26 00:20:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:20:46,742 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 73 [2022-11-26 00:20:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:20:46,744 INFO L225 Difference]: With dead ends: 236 [2022-11-26 00:20:46,744 INFO L226 Difference]: Without dead ends: 159 [2022-11-26 00:20:46,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 158 SyntacticMatches, 18 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:20:46,747 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 144 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 2033 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:20:46,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 636 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2033 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-26 00:20:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-26 00:20:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 143. [2022-11-26 00:20:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 88 states have internal predecessors, (102), 45 states have call successors, (45), 12 states have call predecessors, (45), 15 states have return successors, (55), 44 states have call predecessors, (55), 43 states have call successors, (55) [2022-11-26 00:20:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 202 transitions. [2022-11-26 00:20:46,796 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 202 transitions. Word has length 73 [2022-11-26 00:20:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:20:46,797 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 202 transitions. [2022-11-26 00:20:46,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 10 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-26 00:20:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 202 transitions. [2022-11-26 00:20:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:20:46,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:20:46,799 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:20:46,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:20:47,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:20:47,010 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:20:47,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:20:47,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1372413686, now seen corresponding path program 1 times [2022-11-26 00:20:47,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:20:47,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293396733] [2022-11-26 00:20:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:47,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:20:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:20:48,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:20:48,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293396733] [2022-11-26 00:20:48,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293396733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:20:48,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072754055] [2022-11-26 00:20:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:20:48,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:20:48,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:20:48,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:20:48,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:20:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:20:49,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-26 00:20:49,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:20:49,598 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:20:49,599 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-26 00:20:49,755 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 00:20:49,773 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:20:49,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:20:49,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-26 00:20:49,859 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-26 00:20:49,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 87 [2022-11-26 00:20:49,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-26 00:20:49,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 30 [2022-11-26 00:20:49,980 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-26 00:20:49,980 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 71 treesize of output 31 [2022-11-26 00:20:49,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:49,986 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 26 treesize of output 18 [2022-11-26 00:20:50,073 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-26 00:20:50,074 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 15 treesize of output 15 [2022-11-26 00:20:50,223 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_18) .cse0 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_18) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select v_DerPreprocessor_18 24) (select .cse1 24)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)))))) is different from true [2022-11-26 00:20:50,737 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_19 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_20 24)))))) (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|)) (= (select .cse3 24) (select v_DerPreprocessor_18 24))))))) is different from true [2022-11-26 00:20:50,773 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_19 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| Int)) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26|))) (let ((.cse0 (select .cse1 0))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0 v_DerPreprocessor_19) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| v_DerPreprocessor_20) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_26| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_20 24)))))) (exists ((v_DerPreprocessor_17 (Array Int Int)) (v_DerPreprocessor_18 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2 v_DerPreprocessor_17) |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27| v_DerPreprocessor_18) .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_swap_contents_~b#1.base_BEFORE_CALL_27|)) (= (select .cse3 24) (select v_DerPreprocessor_18 24)))))) (not (= (mod |c_assume_abort_if_not_#in~cond| 256) 0))) is different from true [2022-11-26 00:20:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:20:50,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:20:50,897 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 54 treesize of output 46 [2022-11-26 00:20:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:20:51,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072754055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:20:51,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [318770773] [2022-11-26 00:20:51,436 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-26 00:20:51,436 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:20:51,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:20:51,437 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:20:51,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:20:51,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:51,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:51,603 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-26 00:20:51,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-26 00:20:51,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:51,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:51,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 17 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 43 [2022-11-26 00:20:51,719 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 00:20:51,729 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 00:20:51,736 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 00:20:51,744 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 00:20:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:51,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:51,852 INFO L321 Elim1Store]: treesize reduction 64, result has 41.8 percent of original size [2022-11-26 00:20:51,852 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 3 case distinctions, treesize of input 48 treesize of output 61 [2022-11-26 00:20:51,870 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 00:20:51,920 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:20:51,920 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-26 00:20:51,933 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 00:20:51,985 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:20:51,985 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-26 00:20:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,077 INFO L321 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-11-26 00:20:52,077 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 3 case distinctions, treesize of input 48 treesize of output 59 [2022-11-26 00:20:52,112 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 00:20:52,156 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-26 00:20:52,156 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 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:20:52,216 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-26 00:20:52,216 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 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-26 00:20:52,270 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-26 00:20:52,271 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 1 case distinctions, treesize of input 59 treesize of output 29 [2022-11-26 00:20:52,313 INFO L321 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2022-11-26 00:20:52,313 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 1 case distinctions, treesize of input 53 treesize of output 39 [2022-11-26 00:20:52,328 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 00:20:52,366 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:20:52,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-26 00:20:52,385 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-26 00:20:52,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:20:52,421 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:20:52,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-26 00:20:52,455 INFO L321 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2022-11-26 00:20:52,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2022-11-26 00:20:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-26 00:20:52,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:20:52,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:20:52,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:20:52,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:20:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-26 00:20:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:20:52,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:52,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:20:52,832 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 00:20:52,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-26 00:20:52,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 00:20:53,574 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 106 for LOIs [2022-11-26 00:20:54,580 INFO L197 IcfgInterpreter]: Interpreting procedure ensure_linked_list_is_allocated with input of size 156 for LOIs [2022-11-26 00:20:56,756 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 00:20:56,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:56,774 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 00:20:56,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:56,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:56,792 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 00:20:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:56,811 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 00:20:56,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:56,828 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 00:20:56,840 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 00:20:56,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:56,870 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 00:20:56,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:56,878 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 00:20:56,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:56,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:56,891 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 00:20:56,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:56,909 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 00:20:57,388 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 00:20:57,389 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 134 for LOIs [2022-11-26 00:20:57,432 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 00:20:57,499 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:21:04,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [318770773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:21:04,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:21:04,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [9, 17, 8] total 51 [2022-11-26 00:21:04,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419721291] [2022-11-26 00:21:04,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:21:04,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:21:04,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:21:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:21:04,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2084, Unknown=14, NotChecked=282, Total=2550 [2022-11-26 00:21:04,930 INFO L87 Difference]: Start difference. First operand 143 states and 202 transitions. Second operand has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-26 00:21:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:21:11,525 INFO L93 Difference]: Finished difference Result 258 states and 362 transitions. [2022-11-26 00:21:11,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:21:11,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) Word has length 73 [2022-11-26 00:21:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:21:11,530 INFO L225 Difference]: With dead ends: 258 [2022-11-26 00:21:11,530 INFO L226 Difference]: Without dead ends: 178 [2022-11-26 00:21:11,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 167 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=258, Invalid=2700, Unknown=24, NotChecked=324, Total=3306 [2022-11-26 00:21:11,535 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 85 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:21:11,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 330 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-26 00:21:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-26 00:21:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 157. [2022-11-26 00:21:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 94 states have (on average 1.2659574468085106) internal successors, (119), 100 states have internal predecessors, (119), 46 states have call successors, (46), 13 states have call predecessors, (46), 16 states have return successors, (50), 45 states have call predecessors, (50), 44 states have call successors, (50) [2022-11-26 00:21:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 215 transitions. [2022-11-26 00:21:11,584 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 215 transitions. Word has length 73 [2022-11-26 00:21:11,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:21:11,584 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 215 transitions. [2022-11-26 00:21:11,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 7 states have call successors, (13), 4 states have call predecessors, (13), 6 states have return successors, (12), 6 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-26 00:21:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 215 transitions. [2022-11-26 00:21:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:21:11,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:21:11,586 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:21:11,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:21:11,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:11,788 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:21:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:21:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash -714667099, now seen corresponding path program 1 times [2022-11-26 00:21:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:21:11,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271897456] [2022-11-26 00:21:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:11,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:21:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:21:12,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:21:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271897456] [2022-11-26 00:21:12,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271897456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:21:12,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812146203] [2022-11-26 00:21:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:21:12,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:21:12,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:21:12,233 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:21:12,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a76996-18c0-4a3f-8ce6-9d2d06fa9e4b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:21:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:21:12,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:21:13,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:21:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-26 00:21:13,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:21:13,259 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:21:13,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812146203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:21:13,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778218087] [2022-11-26 00:21:13,262 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2022-11-26 00:21:13,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:21:13,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:21:13,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:21:13,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:21:13,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:13,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:13,370 INFO L321 Elim1Store]: treesize reduction 83, result has 33.6 percent of original size [2022-11-26 00:21:13,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 64 [2022-11-26 00:21:13,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:13,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:13,489 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-26 00:21:13,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 49 treesize of output 85 [2022-11-26 00:21:13,559 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 00:21:13,581 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 00:21:13,588 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 00:21:13,611 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 00:21:13,650 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:21:13,651 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-26 00:21:13,672 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 00:21:13,679 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 00:21:13,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:13,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:13,746 INFO L321 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2022-11-26 00:21:13,746 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 3 case distinctions, treesize of input 48 treesize of output 59 [2022-11-26 00:21:13,785 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:21:13,786 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 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-26 00:21:13,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:13,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:13,865 INFO L321 Elim1Store]: treesize reduction 64, result has 41.8 percent of original size [2022-11-26 00:21:13,865 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 3 case distinctions, treesize of input 48 treesize of output 61 [2022-11-26 00:21:13,889 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 00:21:13,945 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-26 00:21:13,946 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 1 case distinctions, treesize of input 29 treesize of output 27 [2022-11-26 00:21:13,996 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-26 00:21:13,996 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 1 case distinctions, treesize of input 47 treesize of output 29 [2022-11-26 00:21:14,041 INFO L321 Elim1Store]: treesize reduction 37, result has 43.9 percent of original size [2022-11-26 00:21:14,041 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 1 case distinctions, treesize of input 47 treesize of output 29 [2022-11-26 00:21:14,069 INFO L321 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-11-26 00:21:14,069 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 1 case distinctions, treesize of input 41 treesize of output 23 [2022-11-26 00:21:14,079 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 00:21:14,104 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:21:14,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-26 00:21:14,127 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-26 00:21:14,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-11-26 00:21:14,140 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-26 00:21:14,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 00:21:14,184 INFO L321 Elim1Store]: treesize reduction 19, result has 50.0 percent of original size [2022-11-26 00:21:14,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2022-11-26 00:21:14,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-26 00:21:14,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:21:14,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:21:14,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:21:14,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2022-11-26 00:21:14,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:21:14,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-11-26 00:21:14,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:14,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 17 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-26 00:21:14,496 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-26 00:21:14,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 21 [2022-11-26 00:21:14,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-26 00:21:15,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:15,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:15,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,570 WARN L233 SmtUtils]: Spent 43.74s on a formula simplification. DAG size of input: 473 DAG size of output: 265 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-26 00:21:59,571 INFO L321 Elim1Store]: treesize reduction 2284, result has 29.0 percent of original size [2022-11-26 00:21:59,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 20 select indices, 20 select index equivalence classes, 15 disjoint index pairs (out of 190 index pairs), introduced 21 new quantified variables, introduced 178 case distinctions, treesize of input 1940 treesize of output 2171 [2022-11-26 00:21:59,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:59,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:21:59,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:24:52,585 WARN L233 SmtUtils]: Spent 2.88m on a formula simplification. DAG size of input: 703 DAG size of output: 381 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-26 00:24:52,587 INFO L321 Elim1Store]: treesize reduction 3329, result has 32.2 percent of original size [2022-11-26 00:24:52,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 20 select indices, 20 select index equivalence classes, 16 disjoint index pairs (out of 190 index pairs), introduced 22 new quantified variables, introduced 215 case distinctions, treesize of input 3110 treesize of output 3808 [2022-11-26 00:24:53,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:53,545 INFO L217 Elim1Store]: Index analysis took 194 ms [2022-11-26 00:24:59,505 WARN L233 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 121 DAG size of output: 74 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-26 00:24:59,506 INFO L321 Elim1Store]: treesize reduction 459, result has 34.4 percent of original size [2022-11-26 00:24:59,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 524 treesize of output 685 [2022-11-26 00:25:00,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:25:02,792 INFO L321 Elim1Store]: treesize reduction 459, result has 34.4 percent of original size [2022-11-26 00:25:02,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 524 treesize of output 690