./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_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_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/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_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/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_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/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 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 01:09:41,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 01:09:41,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 01:09:41,516 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 01:09:41,516 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 01:09:41,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 01:09:41,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 01:09:41,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 01:09:41,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 01:09:41,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 01:09:41,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 01:09:41,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 01:09:41,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 01:09:41,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 01:09:41,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 01:09:41,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 01:09:41,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 01:09:41,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 01:09:41,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 01:09:41,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 01:09:41,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 01:09:41,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 01:09:41,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 01:09:41,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 01:09:41,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 01:09:41,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 01:09:41,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 01:09:41,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 01:09:41,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 01:09:41,587 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 01:09:41,587 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 01:09:41,588 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 01:09:41,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 01:09:41,594 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 01:09:41,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 01:09:41,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 01:09:41,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 01:09:41,597 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 01:09:41,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 01:09:41,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 01:09:41,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 01:09:41,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-26 01:09:41,626 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 01:09:41,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 01:09:41,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 01:09:41,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 01:09:41,628 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 01:09:41,628 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 01:09:41,628 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 01:09:41,628 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 01:09:41,629 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 01:09:41,629 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 01:09:41,629 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 01:09:41,629 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 01:09:41,630 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 01:09:41,630 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 01:09:41,630 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 01:09:41,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 01:09:41,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 01:09:41,631 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 01:09:41,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 01:09:41,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 01:09:41,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 01:09:41,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 01:09:41,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 01:09:41,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 01:09:41,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 01:09:41,634 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 01:09:41,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 01:09:41,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 01:09:41,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 01:09:41,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:41,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 01:09:41,636 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 01:09:41,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 01:09:41,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 01:09:41,637 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 01:09:41,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 01:09:41,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 01:09:41,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 01:09:41,638 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_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2022-11-26 01:09:41,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 01:09:42,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 01:09:42,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 01:09:42,033 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 01:09:42,033 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 01:09:42,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-26 01:09:45,426 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 01:09:46,052 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 01:09:46,052 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-26 01:09:46,091 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/data/883a573fa/f67c4b3526f141148bf75c65ec8bf36f/FLAG2ecf1605d [2022-11-26 01:09:46,110 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/data/883a573fa/f67c4b3526f141148bf75c65ec8bf36f [2022-11-26 01:09:46,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 01:09:46,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 01:09:46,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:46,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 01:09:46,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 01:09:46,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:46" (1/1) ... [2022-11-26 01:09:46,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c04060e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:46, skipping insertion in model container [2022-11-26 01:09:46,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 01:09:46" (1/1) ... [2022-11-26 01:09:46,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 01:09:46,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 01:09:46,540 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_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-26 01:09:46,552 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_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-26 01:09:47,658 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 01:09:47,665 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,666 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,667 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,668 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,669 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,684 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,685 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,687 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,688 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,690 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,691 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,692 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,693 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:47,780 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:09:47,781 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:09:47,782 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:09:47,787 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 01:09:47,790 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 01:09:47,790 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 01:09:48,127 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 01:09:48,135 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 01:09:48,139 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 01:09:48,141 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 01:09:48,144 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 01:09:48,148 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 01:09:48,154 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 01:09:48,156 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 01:09:48,157 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 01:09:48,158 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 01:09:48,159 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 01:09:48,409 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 01:09:48,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:48,451 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 01:09:48,469 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_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-26 01:09:48,470 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_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-26 01:09:48,561 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-26 01:09:48,565 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,566 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,567 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,567 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,568 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,576 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,582 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,584 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,584 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,585 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,586 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,587 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,587 WARN L1576 CHandler]: Possible shadowing of function index [2022-11-26 01:09:48,602 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:09:48,603 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:09:48,603 WARN L623 FunctionHandler]: Unknown extern function htonl [2022-11-26 01:09:48,607 WARN L623 FunctionHandler]: Unknown extern function ntohl [2022-11-26 01:09:48,609 WARN L623 FunctionHandler]: Unknown extern function htons [2022-11-26 01:09:48,609 WARN L623 FunctionHandler]: Unknown extern function ntohs [2022-11-26 01:09:48,674 WARN L623 FunctionHandler]: Unknown extern function my_abort [2022-11-26 01:09:48,675 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-26 01:09:48,677 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-26 01:09:48,677 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-26 01:09:48,678 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-26 01:09:48,687 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-26 01:09:48,688 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-26 01:09:48,689 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-26 01:09:48,690 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-26 01:09:48,691 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-26 01:09:48,692 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-26 01:09:48,739 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-26 01:09:48,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 01:09:49,006 INFO L208 MainTranslator]: Completed translation [2022-11-26 01:09:49,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49 WrapperNode [2022-11-26 01:09:49,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 01:09:49,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:49,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 01:09:49,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 01:09:49,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,131 INFO L138 Inliner]: procedures = 679, calls = 1044, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 133 [2022-11-26 01:09:49,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 01:09:49,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 01:09:49,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 01:09:49,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 01:09:49,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,199 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 01:09:49,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 01:09:49,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 01:09:49,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 01:09:49,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (1/1) ... [2022-11-26 01:09:49,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 01:09:49,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:49,268 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 01:09:49,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 01:09:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 01:09:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-26 01:09:49,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-26 01:09:49,319 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-26 01:09:49,320 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-26 01:09:49,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 01:09:49,321 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-26 01:09:49,321 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-26 01:09:49,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 01:09:49,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-26 01:09:49,322 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2022-11-26 01:09:49,322 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2022-11-26 01:09:49,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 01:09:49,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 01:09:49,322 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-26 01:09:49,322 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-26 01:09:49,322 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-26 01:09:49,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-26 01:09:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 01:09:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-26 01:09:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-26 01:09:49,323 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-26 01:09:49,323 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-26 01:09:49,324 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-26 01:09:49,324 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-26 01:09:49,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 01:09:49,676 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 01:09:49,679 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 01:09:50,069 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 01:09:50,262 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 01:09:50,263 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 01:09:50,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:09:50 BoogieIcfgContainer [2022-11-26 01:09:50,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 01:09:50,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 01:09:50,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 01:09:50,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 01:09:50,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 01:09:46" (1/3) ... [2022-11-26 01:09:50,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf23e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:09:50, skipping insertion in model container [2022-11-26 01:09:50,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 01:09:49" (2/3) ... [2022-11-26 01:09:50,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf23e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 01:09:50, skipping insertion in model container [2022-11-26 01:09:50,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 01:09:50" (3/3) ... [2022-11-26 01:09:50,291 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2022-11-26 01:09:50,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 01:09:50,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 01:09:50,372 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 01:09:50,380 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;@44d0b2df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 01:09:50,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 01:09:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-26 01:09:50,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-26 01:09:50,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:50,399 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2022-11-26 01:09:50,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:50,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1216931554, now seen corresponding path program 1 times [2022-11-26 01:09:50,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:50,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094566644] [2022-11-26 01:09:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:50,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-26 01:09:51,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:51,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094566644] [2022-11-26 01:09:51,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094566644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:51,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086926578] [2022-11-26 01:09:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:51,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:51,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:51,512 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:51,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 01:09:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-26 01:09:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:51,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:09:52,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:09:52,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:52,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:52,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:52,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 41 [2022-11-26 01:09:52,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:52,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:52,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:52,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 43 [2022-11-26 01:09:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 01:09:55,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:09:55,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086926578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:09:55,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:09:55,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-11-26 01:09:55,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532035728] [2022-11-26 01:09:55,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:09:55,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-26 01:09:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:09:55,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-26 01:09:55,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:09:55,367 INFO L87 Difference]: Start difference. First operand has 69 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 01:09:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:09:56,618 INFO L93 Difference]: Finished difference Result 188 states and 265 transitions. [2022-11-26 01:09:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 01:09:56,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2022-11-26 01:09:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:09:56,634 INFO L225 Difference]: With dead ends: 188 [2022-11-26 01:09:56,634 INFO L226 Difference]: Without dead ends: 127 [2022-11-26 01:09:56,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-26 01:09:56,650 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 75 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:09:56,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 347 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-26 01:09:56,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-26 01:09:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-26 01:09:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 65 states have internal predecessors, (76), 46 states have call successors, (46), 15 states have call predecessors, (46), 15 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-26 01:09:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 166 transitions. [2022-11-26 01:09:56,751 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 166 transitions. Word has length 52 [2022-11-26 01:09:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:09:56,753 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 166 transitions. [2022-11-26 01:09:56,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-26 01:09:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 166 transitions. [2022-11-26 01:09:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-26 01:09:56,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:09:56,758 INFO L195 NwaCegarLoop]: trace histogram [6, 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 01:09:56,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-26 01:09:56,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-26 01:09:56,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:09:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:09:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1311656922, now seen corresponding path program 1 times [2022-11-26 01:09:56,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:09:56,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056159357] [2022-11-26 01:09:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:09:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:09:57,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:09:57,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056159357] [2022-11-26 01:09:57,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056159357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:09:57,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100695058] [2022-11-26 01:09:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:09:57,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:09:57,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:09:57,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:09:57,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 01:09:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:09:57,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-26 01:09:57,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:09:57,613 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 6 treesize of output 5 [2022-11-26 01:09:57,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:09:57,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:09:57,931 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:09:57,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:09:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:57,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-26 01:09:57,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 01:09:57,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:57,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:57,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-26 01:09:57,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-26 01:09:58,095 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 01:09:58,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 126 treesize of output 140 [2022-11-26 01:09:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:58,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:58,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:58,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 124 [2022-11-26 01:09:58,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:09:58,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2022-11-26 01:09:58,131 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 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-26 01:09:58,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 25 [2022-11-26 01:09:58,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 01:09:58,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2022-11-26 01:10:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 01:10:01,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:09,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:09,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-26 01:10:09,492 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:09,493 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 379 treesize of output 319 [2022-11-26 01:10:09,509 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 330 treesize of output 314 [2022-11-26 01:10:09,524 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 114 treesize of output 106 [2022-11-26 01:10:09,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 01:10:09,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 01:10:10,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 74 [2022-11-26 01:10:10,091 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-26 01:10:10,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,104 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 195 treesize of output 169 [2022-11-26 01:10:10,111 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 156 treesize of output 148 [2022-11-26 01:10:10,125 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 73 treesize of output 69 [2022-11-26 01:10:10,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 01:10:10,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 70 [2022-11-26 01:10:10,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-26 01:10:10,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:10,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,289 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 73 treesize of output 73 [2022-11-26 01:10:10,300 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 61 treesize of output 59 [2022-11-26 01:10:10,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 53 [2022-11-26 01:10:10,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,342 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 257 treesize of output 227 [2022-11-26 01:10:10,361 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 152 treesize of output 148 [2022-11-26 01:10:10,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 146 [2022-11-26 01:10:10,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 01:10:10,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 54 [2022-11-26 01:10:10,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 01:10:10,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 71 [2022-11-26 01:10:10,577 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-26 01:10:10,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:10,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,594 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 75 treesize of output 75 [2022-11-26 01:10:10,602 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 50 treesize of output 46 [2022-11-26 01:10:10,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 01:10:10,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 51 [2022-11-26 01:10:10,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2022-11-26 01:10:10,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:10,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,778 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 79 treesize of output 79 [2022-11-26 01:10:10,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-11-26 01:10:10,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2022-11-26 01:10:10,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,836 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 459 treesize of output 395 [2022-11-26 01:10:10,854 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 330 treesize of output 314 [2022-11-26 01:10:10,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 306 [2022-11-26 01:10:10,931 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 8 treesize of output 4 [2022-11-26 01:10:10,951 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:10,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 50 [2022-11-26 01:10:11,030 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 8 treesize of output 4 [2022-11-26 01:10:11,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:11,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 69 [2022-11-26 01:10:11,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:11,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 54 [2022-11-26 01:10:11,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:11,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:11,191 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 75 treesize of output 75 [2022-11-26 01:10:11,203 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 50 treesize of output 46 [2022-11-26 01:10:11,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-26 01:10:11,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:10:11,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 51 [2022-11-26 01:10:11,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100695058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:11,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1852847877] [2022-11-26 01:10:11,757 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-26 01:10:11,757 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:11,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:11,766 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:11,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:11,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:11,884 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:10:11,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:10:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:11,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:10:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:10:12,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:10:12,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:10:12,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:10:12,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 01:10:12,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:12,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:12,513 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:10:12,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 01:10:12,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:10:12,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:12,616 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:10:12,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 01:10:12,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,734 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:10:12,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:10:12,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 01:10:12,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:10:12,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 01:10:12,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:12,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 01:10:12,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:12,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:10:13,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:10:13,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:10:13,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:13,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:10:13,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:13,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:13,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 01:10:13,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:13,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:10:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:13,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:10:13,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:10:13,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:10:13,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:13,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:10:13,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:13,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:13,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:10:13,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:13,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:10:13,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:13,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:10:14,145 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-26 01:10:14,449 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 44 for LOIs [2022-11-26 01:10:14,552 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-26 01:10:14,793 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 30 for LOIs [2022-11-26 01:10:14,799 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:10:14,821 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:10:20,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1852847877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:20,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:10:20,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5, 11] total 35 [2022-11-26 01:10:20,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893914383] [2022-11-26 01:10:20,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:20,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 01:10:20,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:20,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 01:10:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1651, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 01:10:20,616 INFO L87 Difference]: Start difference. First operand 125 states and 166 transitions. Second operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-26 01:10:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:24,034 INFO L93 Difference]: Finished difference Result 182 states and 240 transitions. [2022-11-26 01:10:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 01:10:24,035 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 53 [2022-11-26 01:10:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:24,038 INFO L225 Difference]: With dead ends: 182 [2022-11-26 01:10:24,038 INFO L226 Difference]: Without dead ends: 129 [2022-11-26 01:10:24,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 17 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=179, Invalid=1891, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 01:10:24,041 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 42 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:24,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 327 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-26 01:10:24,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-26 01:10:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-26 01:10:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 65 states have (on average 1.2) internal successors, (78), 68 states have internal predecessors, (78), 46 states have call successors, (46), 16 states have call predecessors, (46), 17 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-11-26 01:10:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2022-11-26 01:10:24,093 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 53 [2022-11-26 01:10:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:24,094 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2022-11-26 01:10:24,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 8 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-26 01:10:24,094 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2022-11-26 01:10:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 01:10:24,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:24,096 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2022-11-26 01:10:24,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-26 01:10:24,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:24,314 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:24,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1499262494, now seen corresponding path program 1 times [2022-11-26 01:10:24,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:24,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706517066] [2022-11-26 01:10:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:24,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:10:24,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:24,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706517066] [2022-11-26 01:10:24,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706517066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:24,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990156259] [2022-11-26 01:10:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:24,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:24,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:24,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:24,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 01:10:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:24,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 01:10:24,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:10:24,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:24,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990156259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:24,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:10:24,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-26 01:10:24,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612942255] [2022-11-26 01:10:24,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:24,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 01:10:24,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:24,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 01:10:24,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-26 01:10:24,974 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 01:10:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:25,265 INFO L93 Difference]: Finished difference Result 241 states and 319 transitions. [2022-11-26 01:10:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 01:10:25,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 55 [2022-11-26 01:10:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:25,275 INFO L225 Difference]: With dead ends: 241 [2022-11-26 01:10:25,276 INFO L226 Difference]: Without dead ends: 129 [2022-11-26 01:10:25,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:10:25,283 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 44 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:25,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 373 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:10:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-26 01:10:25,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-11-26 01:10:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 68 states have internal predecessors, (76), 46 states have call successors, (46), 16 states have call predecessors, (46), 17 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-11-26 01:10:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 168 transitions. [2022-11-26 01:10:25,349 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 168 transitions. Word has length 55 [2022-11-26 01:10:25,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:25,350 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 168 transitions. [2022-11-26 01:10:25,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 01:10:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 168 transitions. [2022-11-26 01:10:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-26 01:10:25,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:25,360 INFO L195 NwaCegarLoop]: trace histogram [6, 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 01:10:25,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:25,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-26 01:10:25,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash -342041622, now seen corresponding path program 1 times [2022-11-26 01:10:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:25,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585513032] [2022-11-26 01:10:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:25,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:10:25,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585513032] [2022-11-26 01:10:25,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585513032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142623062] [2022-11-26 01:10:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:25,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:25,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:25,865 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:25,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 01:10:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:26,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 01:10:26,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 01:10:26,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:26,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142623062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:26,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:10:26,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-26 01:10:26,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751691335] [2022-11-26 01:10:26,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:26,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 01:10:26,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:26,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 01:10:26,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:10:26,228 INFO L87 Difference]: Start difference. First operand 129 states and 168 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 01:10:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:26,602 INFO L93 Difference]: Finished difference Result 259 states and 345 transitions. [2022-11-26 01:10:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 01:10:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 57 [2022-11-26 01:10:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:26,605 INFO L225 Difference]: With dead ends: 259 [2022-11-26 01:10:26,605 INFO L226 Difference]: Without dead ends: 145 [2022-11-26 01:10:26,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-26 01:10:26,607 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 73 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:26,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 417 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:10:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-26 01:10:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2022-11-26 01:10:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 67 states have (on average 1.164179104477612) internal successors, (78), 70 states have internal predecessors, (78), 46 states have call successors, (46), 16 states have call predecessors, (46), 17 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-11-26 01:10:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 170 transitions. [2022-11-26 01:10:26,688 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 170 transitions. Word has length 57 [2022-11-26 01:10:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:26,688 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 170 transitions. [2022-11-26 01:10:26,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-26 01:10:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 170 transitions. [2022-11-26 01:10:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-26 01:10:26,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:26,690 INFO L195 NwaCegarLoop]: trace histogram [6, 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 01:10:26,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:26,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:26,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:26,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2018481229, now seen corresponding path program 1 times [2022-11-26 01:10:26,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:26,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205723739] [2022-11-26 01:10:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:26,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:10:27,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:27,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205723739] [2022-11-26 01:10:27,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205723739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:27,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647351598] [2022-11-26 01:10:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:27,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:27,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:27,303 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:27,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 01:10:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:27,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:10:27,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 01:10:27,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:10:27,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647351598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:10:27,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:10:27,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-26 01:10:27,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776869784] [2022-11-26 01:10:27,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:10:27,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:10:27,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:10:27,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:10:27,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:10:27,559 INFO L87 Difference]: Start difference. First operand 131 states and 170 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-26 01:10:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:10:27,671 INFO L93 Difference]: Finished difference Result 251 states and 337 transitions. [2022-11-26 01:10:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:10:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 58 [2022-11-26 01:10:27,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:10:27,676 INFO L225 Difference]: With dead ends: 251 [2022-11-26 01:10:27,676 INFO L226 Difference]: Without dead ends: 143 [2022-11-26 01:10:27,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-26 01:10:27,680 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:10:27,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 147 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 01:10:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-26 01:10:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2022-11-26 01:10:27,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 72 states have internal predecessors, (80), 46 states have call successors, (46), 16 states have call predecessors, (46), 17 states have return successors, (46), 44 states have call predecessors, (46), 44 states have call successors, (46) [2022-11-26 01:10:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 172 transitions. [2022-11-26 01:10:27,751 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 172 transitions. Word has length 58 [2022-11-26 01:10:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:10:27,751 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 172 transitions. [2022-11-26 01:10:27,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-26 01:10:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 172 transitions. [2022-11-26 01:10:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-26 01:10:27,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:10:27,753 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1] [2022-11-26 01:10:27,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 01:10:27,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:27,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:10:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:10:27,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1650262769, now seen corresponding path program 1 times [2022-11-26 01:10:27,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:10:27,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700376377] [2022-11-26 01:10:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:27,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:10:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 01:10:28,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:10:28,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700376377] [2022-11-26 01:10:28,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700376377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:10:28,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575265326] [2022-11-26 01:10:28,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:10:28,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:10:28,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:10:28,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:10:28,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 01:10:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:10:28,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-26 01:10:28,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:10:28,498 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 6 treesize of output 5 [2022-11-26 01:10:28,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 01:10:28,726 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:10:28,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:10:28,735 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 01:10:28,751 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:10:28,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:10:28,834 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 01:10:28,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 114 [2022-11-26 01:10:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:28,841 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 110 treesize of output 90 [2022-11-26 01:10:28,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-26 01:10:28,858 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 0 case distinctions, treesize of input 14 treesize of output 13 [2022-11-26 01:10:28,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 21 [2022-11-26 01:10:28,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 01:10:39,262 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:10:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:10:42,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:10:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:10:46,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575265326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:10:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958891713] [2022-11-26 01:10:46,978 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-26 01:10:46,978 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:10:46,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:10:46,980 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:10:46,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:10:47,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,053 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-26 01:10:47,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2022-11-26 01:10:47,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,133 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:10:47,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:10:47,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:10:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:10:47,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:10:47,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:10:47,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 01:10:47,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,637 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 01:10:47,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-26 01:10:47,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,744 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:10:47,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:10:47,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:10:47,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:10:47,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:47,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:47,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:10:48,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:48,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:48,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:48,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:48,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:48,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:48,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:48,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:48,548 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 01:10:48,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-11-26 01:10:48,891 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-26 01:10:48,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 641 treesize of output 652 [2022-11-26 01:10:49,398 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-26 01:10:49,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 644 treesize of output 662 [2022-11-26 01:10:49,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:49,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:49,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:49,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:49,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:49,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:49,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:49,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:49,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:49,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:49,794 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-26 01:10:49,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 684 treesize of output 687 [2022-11-26 01:10:49,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:49,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:10:49,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:49,910 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 01:10:49,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 678 treesize of output 631 [2022-11-26 01:10:49,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:49,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 631 [2022-11-26 01:10:55,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:10:55,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:10:55,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:55,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:10:55,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:10:55,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:55,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 01:10:55,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:55,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:10:55,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:55,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:10:55,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:55,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:55,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:10:55,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:55,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:10:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:55,729 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 35 treesize of output 7 [2022-11-26 01:10:55,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:10:55,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:10:56,051 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 79 for LOIs [2022-11-26 01:10:56,539 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 49 for LOIs [2022-11-26 01:10:56,638 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 79 for LOIs [2022-11-26 01:10:57,110 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-26 01:10:57,115 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:10:57,134 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-26 01:10:57,197 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:05,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1958891713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:11:05,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:11:05,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [6, 16, 7] total 53 [2022-11-26 01:11:05,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216240709] [2022-11-26 01:11:05,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:11:05,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 01:11:05,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:05,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 01:11:05,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2546, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 01:11:05,341 INFO L87 Difference]: Start difference. First operand 133 states and 172 transitions. Second operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 01:11:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:12,504 INFO L93 Difference]: Finished difference Result 257 states and 333 transitions. [2022-11-26 01:11:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-26 01:11:12,505 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 61 [2022-11-26 01:11:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:12,506 INFO L225 Difference]: With dead ends: 257 [2022-11-26 01:11:12,506 INFO L226 Difference]: Without dead ends: 147 [2022-11-26 01:11:12,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 119 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 01:11:12,509 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 70 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:12,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 319 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-26 01:11:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-26 01:11:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2022-11-26 01:11:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 80 states have internal predecessors, (89), 48 states have call successors, (48), 18 states have call predecessors, (48), 20 states have return successors, (50), 46 states have call predecessors, (50), 46 states have call successors, (50) [2022-11-26 01:11:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 187 transitions. [2022-11-26 01:11:12,574 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 187 transitions. Word has length 61 [2022-11-26 01:11:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:12,575 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 187 transitions. [2022-11-26 01:11:12,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 20 states have (on average 1.3) internal successors, (26), 17 states have internal predecessors, (26), 9 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 01:11:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 187 transitions. [2022-11-26 01:11:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-26 01:11:12,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:12,576 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1] [2022-11-26 01:11:12,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 01:11:12,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:12,779 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:11:12,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:12,779 INFO L85 PathProgramCache]: Analyzing trace with hash 575582167, now seen corresponding path program 1 times [2022-11-26 01:11:12,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:12,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320776989] [2022-11-26 01:11:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:12,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 01:11:13,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320776989] [2022-11-26 01:11:13,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320776989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:11:13,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630772052] [2022-11-26 01:11:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:13,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:13,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:13,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:11:13,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 01:11:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:14,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-26 01:11:14,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:11:14,160 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 6 treesize of output 5 [2022-11-26 01:11:14,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 01:11:14,412 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:11:14,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:11:14,420 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 01:11:14,435 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:11:14,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:11:14,522 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-26 01:11:14,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 99 [2022-11-26 01:11:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:14,530 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 85 treesize of output 71 [2022-11-26 01:11:14,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-26 01:11:14,649 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| Int) (v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse0 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|)) (= (select .cse1 24) (select v_DerPreprocessor_21 24)))))) is different from true [2022-11-26 01:11:14,871 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| Int) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57|))) (let ((.cse0 (select .cse1 0))) (and (not (= |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| .cse0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| v_DerPreprocessor_23) .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| v_DerPreprocessor_23) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_23 24)) (not (= .cse0 0)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| Int) (v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|))) (let ((.cse2 (select .cse3 0))) (and (not (= .cse2 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse2 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse2) (select |c_#memory_$Pointer$.base| .cse2)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|)) (= (select .cse3 24) (select v_DerPreprocessor_21 24))))))) is different from true [2022-11-26 01:11:15,494 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| Int) (v_DerPreprocessor_22 (Array Int Int)) (v_DerPreprocessor_23 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57|))) (let ((.cse0 (select .cse1 0))) (and (not (= |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| .cse0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| v_DerPreprocessor_23) .cse0 v_DerPreprocessor_22) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_57| v_DerPreprocessor_23) .cse0) (select |c_#memory_$Pointer$.base| .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_23 24)) (not (= .cse0 0)))))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_40 Int) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_40))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_24) v_aws_linked_list_front_~list.base_BEFORE_CALL_40 v_DerPreprocessor_25) .cse2 v_DerPreprocessor_24) v_aws_linked_list_front_~list.base_BEFORE_CALL_40 v_DerPreprocessor_25) .cse2)) (not (= .cse2 0)) (= (select .cse3 24) (select v_DerPreprocessor_25 24)) (not (= v_aws_linked_list_front_~list.base_BEFORE_CALL_40 .cse2)))))) (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| Int) (v_DerPreprocessor_20 (Array Int Int)) (v_DerPreprocessor_21 (Array Int Int))) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|))) (let ((.cse4 (select .cse5 0))) (and (not (= .cse4 0)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse4 v_DerPreprocessor_20) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56| v_DerPreprocessor_21) .cse4) (select |c_#memory_$Pointer$.base| .cse4)) (not (= .cse4 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_56|)) (= (select .cse5 24) (select v_DerPreprocessor_21 24))))))) is different from true [2022-11-26 01:11:16,842 INFO L321 Elim1Store]: treesize reduction 224, result has 0.4 percent of original size [2022-11-26 01:11:16,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 252 treesize of output 182 [2022-11-26 01:11:16,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 1 [2022-11-26 01:11:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 6 not checked. [2022-11-26 01:11:16,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:11:17,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:17,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2022-11-26 01:11:17,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:17,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 316 treesize of output 292 [2022-11-26 01:11:17,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 298 [2022-11-26 01:11:17,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 294 [2022-11-26 01:11:17,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 01:11:17,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-26 01:11:17,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:17,903 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 105 treesize of output 99 [2022-11-26 01:11:18,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630772052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:11:18,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [957759471] [2022-11-26 01:11:18,401 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-26 01:11:18,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:11:18,402 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:11:18,402 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:11:18,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:11:18,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,467 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:11:18,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:11:18,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:11:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:11:18,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:11:18,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:11:18,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:11:18,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:11:18,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:18,993 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 01:11:18,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-26 01:11:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,105 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:11:19,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:11:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:11:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 01:11:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:11:19,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,900 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 01:11:19,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-26 01:11:19,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:19,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:19,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:20,298 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-26 01:11:20,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 692 treesize of output 695 [2022-11-26 01:11:20,659 INFO L321 Elim1Store]: treesize reduction 196, result has 21.9 percent of original size [2022-11-26 01:11:20,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 652 treesize of output 682 [2022-11-26 01:11:20,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:20,746 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 01:11:20,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 684 treesize of output 637 [2022-11-26 01:11:20,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 658 treesize of output 637 [2022-11-26 01:11:20,904 INFO L321 Elim1Store]: treesize reduction 110, result has 15.4 percent of original size [2022-11-26 01:11:20,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 645 treesize of output 656 [2022-11-26 01:11:22,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:11:22,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:11:22,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:11:22,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:11:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 01:11:22,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:22,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 01:11:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:11:22,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:11:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:11:22,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:11:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:22,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:11:23,270 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-26 01:11:23,810 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 43 for LOIs [2022-11-26 01:11:23,885 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-26 01:11:24,741 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 61 for LOIs [2022-11-26 01:11:24,758 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:11:24,776 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:11:24,836 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:11:33,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [957759471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:11:33,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:11:33,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 18] total 54 [2022-11-26 01:11:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400990777] [2022-11-26 01:11:33,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:11:33,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 01:11:33,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:11:33,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 01:11:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3527, Unknown=19, NotChecked=366, Total=4160 [2022-11-26 01:11:33,883 INFO L87 Difference]: Start difference. First operand 145 states and 187 transitions. Second operand has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 01:11:41,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:11:41,376 INFO L93 Difference]: Finished difference Result 283 states and 368 transitions. [2022-11-26 01:11:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 01:11:41,376 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 63 [2022-11-26 01:11:41,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:11:41,378 INFO L225 Difference]: With dead ends: 283 [2022-11-26 01:11:41,378 INFO L226 Difference]: Without dead ends: 161 [2022-11-26 01:11:41,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=355, Invalid=4596, Unknown=31, NotChecked=420, Total=5402 [2022-11-26 01:11:41,383 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 66 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:11:41,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 311 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-26 01:11:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-26 01:11:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2022-11-26 01:11:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 82 states have internal predecessors, (91), 48 states have call successors, (48), 18 states have call predecessors, (48), 20 states have return successors, (50), 46 states have call predecessors, (50), 46 states have call successors, (50) [2022-11-26 01:11:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2022-11-26 01:11:41,458 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 63 [2022-11-26 01:11:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:11:41,459 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2022-11-26 01:11:41,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-26 01:11:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2022-11-26 01:11:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-26 01:11:41,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:11:41,461 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1] [2022-11-26 01:11:41,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 01:11:41,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-26 01:11:41,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:11:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:11:41,674 INFO L85 PathProgramCache]: Analyzing trace with hash 658052454, now seen corresponding path program 1 times [2022-11-26 01:11:41,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:11:41,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280012697] [2022-11-26 01:11:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:41,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:11:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:43,252 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 01:11:43,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:11:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280012697] [2022-11-26 01:11:43,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280012697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:11:43,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549009657] [2022-11-26 01:11:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:11:43,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:11:43,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:11:43,267 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:11:43,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 01:11:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:11:43,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-26 01:11:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:11:43,590 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 6 treesize of output 5 [2022-11-26 01:11:43,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 01:11:43,785 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:11:43,785 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 01:11:43,798 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 01:11:43,814 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:11:43,815 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 11 treesize of output 11 [2022-11-26 01:11:43,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:43,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2022-11-26 01:11:43,880 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 14 treesize of output 18 [2022-11-26 01:11:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 01:11:44,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:11:45,183 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_952 (Array Int Int)) (v_ArrVal_953 Int) (v_ArrVal_951 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_951) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_952) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base|) (+ |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset| 24) v_ArrVal_953)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) (+ 16 |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|)))) is different from false [2022-11-26 01:11:45,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:45,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-26 01:11:45,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:45,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 267 treesize of output 277 [2022-11-26 01:11:45,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 298 [2022-11-26 01:11:45,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 294 [2022-11-26 01:11:45,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 01:11:45,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 01:11:45,343 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 77 treesize of output 77 [2022-11-26 01:11:45,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 01:11:45,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-26 01:11:45,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 53 [2022-11-26 01:11:45,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2022-11-26 01:11:45,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549009657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:11:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156510348] [2022-11-26 01:11:45,906 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-26 01:11:45,906 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:11:45,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:11:45,907 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:11:45,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:11:45,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:45,983 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:11:45,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:11:46,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:11:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:11:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:11:46,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:11:46,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:11:46,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,450 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:11:46,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:11:46,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 01:11:46,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:11:46,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 01:11:46,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:11:46,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:46,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:11:46,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:46,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:46,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:46,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:46,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:46,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:47,346 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 01:11:47,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-11-26 01:11:47,849 INFO L321 Elim1Store]: treesize reduction 192, result has 23.5 percent of original size [2022-11-26 01:11:47,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 646 treesize of output 680 [2022-11-26 01:11:47,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:47,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:47,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:47,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:47,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:47,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:47,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:47,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:47,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:47,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:47,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:48,222 INFO L321 Elim1Store]: treesize reduction 233, result has 25.6 percent of original size [2022-11-26 01:11:48,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 18 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 686 treesize of output 689 [2022-11-26 01:11:48,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:11:48,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:11:48,399 INFO L321 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2022-11-26 01:11:48,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 641 treesize of output 652 [2022-11-26 01:11:48,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:11:48,478 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 01:11:48,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 678 treesize of output 631 [2022-11-26 01:11:48,535 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 652 treesize of output 631 [2022-11-26 01:12:22,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:12:22,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:12:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:22,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:12:22,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:22,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 01:12:22,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:12:22,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:22,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 01:12:22,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:22,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:12:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:23,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:12:23,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:23,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:12:23,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:23,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:12:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:12:23,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:12:23,391 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 79 for LOIs [2022-11-26 01:12:24,399 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 103 for LOIs [2022-11-26 01:12:24,658 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 84 for LOIs [2022-11-26 01:12:24,716 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 79 for LOIs [2022-11-26 01:12:25,657 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-26 01:12:25,659 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:12:25,680 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:12:25,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:12:44,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6331#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (exists ((|v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29| Int) (|v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| Int)) (and (not (= (mod (ite (= (+ |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) 0) 0 1) 256) 0)) (<= 0 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) (<= 0 |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|)) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|)) 1 0) 0) 0 1) 1) (<= |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29| 0) (<= 0 (ite (= (ite (and (= (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_29|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|)) 1 0) 0) 0 1)))) (<= |#NULL.base| 0) (<= 0 ~tl_last_error~0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58| Int)) (and (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24)) 0) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 0) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_58|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_58| 24)))))) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-26 01:12:44,152 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:12:44,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:12:44,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-26 01:12:44,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448262540] [2022-11-26 01:12:44,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:12:44,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 01:12:44,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 01:12:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=4432, Unknown=1, NotChecked=134, Total=4830 [2022-11-26 01:12:44,155 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-26 01:12:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:47,806 INFO L93 Difference]: Finished difference Result 250 states and 329 transitions. [2022-11-26 01:12:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 01:12:47,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) Word has length 64 [2022-11-26 01:12:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:47,808 INFO L225 Difference]: With dead ends: 250 [2022-11-26 01:12:47,809 INFO L226 Difference]: Without dead ends: 183 [2022-11-26 01:12:47,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 128 SyntacticMatches, 12 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=433, Invalid=6376, Unknown=1, NotChecked=162, Total=6972 [2022-11-26 01:12:47,811 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 257 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:47,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 1321 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-26 01:12:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-26 01:12:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2022-11-26 01:12:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 80 states have (on average 1.175) internal successors, (94), 84 states have internal predecessors, (94), 48 states have call successors, (48), 18 states have call predecessors, (48), 20 states have return successors, (50), 46 states have call predecessors, (50), 46 states have call successors, (50) [2022-11-26 01:12:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 192 transitions. [2022-11-26 01:12:47,886 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 192 transitions. Word has length 64 [2022-11-26 01:12:47,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:47,886 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 192 transitions. [2022-11-26 01:12:47,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 23 states have internal predecessors, (59), 10 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (23), 8 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-26 01:12:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 192 transitions. [2022-11-26 01:12:47,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 01:12:47,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:47,888 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2022-11-26 01:12:47,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:48,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 01:12:48,095 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:48,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:48,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1103162756, now seen corresponding path program 1 times [2022-11-26 01:12:48,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:48,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40243936] [2022-11-26 01:12:48,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:48,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 01:12:48,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40243936] [2022-11-26 01:12:48,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40243936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:48,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835776237] [2022-11-26 01:12:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:48,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:48,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:48,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:48,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:12:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-26 01:12:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 01:12:48,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:12:48,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835776237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:12:48,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:12:48,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 13 [2022-11-26 01:12:48,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591653421] [2022-11-26 01:12:48,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:12:48,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 01:12:48,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:12:48,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 01:12:48,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-11-26 01:12:48,888 INFO L87 Difference]: Start difference. First operand 149 states and 192 transitions. Second operand has 11 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-26 01:12:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:12:49,320 INFO L93 Difference]: Finished difference Result 289 states and 374 transitions. [2022-11-26 01:12:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 01:12:49,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 67 [2022-11-26 01:12:49,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:12:49,322 INFO L225 Difference]: With dead ends: 289 [2022-11-26 01:12:49,322 INFO L226 Difference]: Without dead ends: 163 [2022-11-26 01:12:49,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-26 01:12:49,324 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 17 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:12:49,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 508 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:12:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-26 01:12:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 148. [2022-11-26 01:12:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 84 states have internal predecessors, (92), 48 states have call successors, (48), 18 states have call predecessors, (48), 20 states have return successors, (50), 45 states have call predecessors, (50), 46 states have call successors, (50) [2022-11-26 01:12:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 190 transitions. [2022-11-26 01:12:49,385 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 190 transitions. Word has length 67 [2022-11-26 01:12:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:12:49,386 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 190 transitions. [2022-11-26 01:12:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 5 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-26 01:12:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 190 transitions. [2022-11-26 01:12:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-26 01:12:49,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:12:49,387 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 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] [2022-11-26 01:12:49,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:12:49,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:49,595 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:12:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:12:49,595 INFO L85 PathProgramCache]: Analyzing trace with hash -978232361, now seen corresponding path program 1 times [2022-11-26 01:12:49,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:12:49,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380211660] [2022-11-26 01:12:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:12:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-26 01:12:51,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:12:51,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380211660] [2022-11-26 01:12:51,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380211660] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:12:51,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005031044] [2022-11-26 01:12:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:12:51,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:12:51,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:12:51,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:12:51,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:12:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:12:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-26 01:12:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:12:51,513 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:12:51,514 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 9 treesize of output 15 [2022-11-26 01:12:51,533 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:12:51,533 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 9 treesize of output 15 [2022-11-26 01:12:52,769 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:12:52,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:14:06,782 WARN L233 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 50 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:14:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 01:14:10,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005031044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:14:10,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2069027896] [2022-11-26 01:14:10,265 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-26 01:14:10,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:14:10,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:14:10,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:14:10,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:14:10,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,479 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:14:10,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:14:10,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:14:10,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:14:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:14:10,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:14:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:14:10,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 01:14:10,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:10,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 101 [2022-11-26 01:14:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:14:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:11,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:14:11,781 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 125 for LOIs [2022-11-26 01:14:11,959 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 01:14:11,963 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:14:11,986 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:14:24,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2069027896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:14:24,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:14:24,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15, 20, 23] total 63 [2022-11-26 01:14:24,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744402629] [2022-11-26 01:14:24,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:14:24,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 01:14:24,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:14:24,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 01:14:24,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3634, Unknown=2, NotChecked=0, Total=3906 [2022-11-26 01:14:24,215 INFO L87 Difference]: Start difference. First operand 148 states and 190 transitions. Second operand has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-26 01:14:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:14:26,508 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2022-11-26 01:14:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 01:14:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2022-11-26 01:14:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:14:26,510 INFO L225 Difference]: With dead ends: 157 [2022-11-26 01:14:26,510 INFO L226 Difference]: Without dead ends: 83 [2022-11-26 01:14:26,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 158 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 84.3s TimeCoverageRelationStatistics Valid=277, Invalid=3753, Unknown=2, NotChecked=0, Total=4032 [2022-11-26 01:14:26,513 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 77 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 01:14:26,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 169 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 01:14:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-26 01:14:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-11-26 01:14:26,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 25 states have call successors, (25), 10 states have call predecessors, (25), 11 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-11-26 01:14:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-11-26 01:14:26,559 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 71 [2022-11-26 01:14:26,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:14:26,559 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-11-26 01:14:26,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-26 01:14:26,560 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-11-26 01:14:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-26 01:14:26,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:14:26,561 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2022-11-26 01:14:26,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:14:26,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 01:14:26,767 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:14:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:14:26,768 INFO L85 PathProgramCache]: Analyzing trace with hash -86348583, now seen corresponding path program 2 times [2022-11-26 01:14:26,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:14:26,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768330346] [2022-11-26 01:14:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:14:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:14:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:14:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 01:14:33,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:14:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768330346] [2022-11-26 01:14:33,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768330346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:14:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579896437] [2022-11-26 01:14:33,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:14:33,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:14:33,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:14:33,382 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:14:33,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:14:33,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 01:14:33,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:14:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-26 01:14:33,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:14:34,025 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:14:34,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-11-26 01:14:35,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:14:35,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 01:14:35,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:35,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-26 01:14:35,642 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:14:35,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-26 01:14:35,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:35,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-26 01:14:35,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:35,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-11-26 01:14:35,744 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:14:35,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-26 01:14:35,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:35,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-26 01:14:35,942 INFO L321 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-11-26 01:14:35,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2022-11-26 01:14:36,396 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-26 01:14:36,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 151 [2022-11-26 01:14:36,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:36,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:36,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 124 [2022-11-26 01:14:36,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:36,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2022-11-26 01:14:36,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-26 01:14:36,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:36,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:14:36,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-26 01:15:36,005 WARN L233 SmtUtils]: Spent 35.35s on a formula simplification that was a NOOP. DAG size: 196 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:16:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 13 refuted. 2 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 01:16:48,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:16:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-26 01:16:59,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579896437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:16:59,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1919251303] [2022-11-26 01:16:59,841 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-26 01:16:59,841 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:16:59,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:16:59,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:16:59,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:16:59,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,030 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:17:00,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:17:00,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-26 01:17:00,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:17:00,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:17:00,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:17:00,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:17:00,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,740 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:17:00,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:17:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:17:00,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-26 01:17:00,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 01:17:00,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:17:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:00,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:01,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:01,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:01,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:01,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 99 [2022-11-26 01:17:01,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:01,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:01,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:01,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:01,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:01,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:01,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:01,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:01,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:01,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:02,063 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-26 01:17:02,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 666 treesize of output 675 [2022-11-26 01:17:02,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:02,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:02,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:02,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:02,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:02,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:02,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:02,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:02,769 INFO L321 Elim1Store]: treesize reduction 251, result has 26.2 percent of original size [2022-11-26 01:17:02,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 11 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 692 treesize of output 695 [2022-11-26 01:17:03,217 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-26 01:17:03,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 647 treesize of output 658 [2022-11-26 01:17:03,392 INFO L217 Elim1Store]: Index analysis took 110 ms [2022-11-26 01:17:03,768 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-26 01:17:03,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 23 case distinctions, treesize of input 650 treesize of output 668 [2022-11-26 01:17:03,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:03,884 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-26 01:17:03,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 682 treesize of output 635 [2022-11-26 01:17:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:03,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:03,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 656 treesize of output 635 [2022-11-26 01:17:27,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:27,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:17:28,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:17:28,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:17:28,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:17:28,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:28,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:17:28,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:28,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-26 01:17:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:28,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-26 01:17:28,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:28,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:17:29,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:29,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:17:29,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:29,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:29,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:17:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:29,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:17:29,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:17:29,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:17:29,506 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 78 for LOIs [2022-11-26 01:17:30,567 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 101 for LOIs [2022-11-26 01:17:30,837 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 83 for LOIs [2022-11-26 01:17:30,903 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 78 for LOIs [2022-11-26 01:17:31,857 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 20 for LOIs [2022-11-26 01:17:31,861 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:17:31,885 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:17:31,950 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:18:10,775 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9176#(and (<= |~#s_can_fail_allocator_static~0.base| 4) (<= 0 |__VERIFIER_assert_#in~cond|) (<= 0 |#NULL.base|) (<= 0 |~#s_can_fail_allocator_static~0.offset|) (exists ((|v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45| Int) (|v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45| Int)) (and (<= 0 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (<= |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45| 0) (<= 0 (ite (= (ite (and (= (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|)) 1 0) 0) 0 1)) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|)) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= (ite (= (ite (and (= (+ 16 |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|)) (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|)) 1 0) 0) 0 1) 1) (not (= 0 (mod (ite (= (+ |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45| |v_aws_linked_list_front_#in~list.offset_BEFORE_CALL_45|) 0) 0 1) 256))) (<= 0 |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|))) (= (mod __VERIFIER_assert_~cond 256) 0) (<= 4 |~#s_can_fail_allocator_static~0.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= ~tl_last_error~0 0) (<= |#NULL.base| 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) (<= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) (<= 16 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|)) (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 8)) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base_BEFORE_CALL_39|) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.offset_BEFORE_CALL_39|) 16))) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (<= |~#s_can_fail_allocator_static~0.offset| 0))' at error location [2022-11-26 01:18:10,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:18:10,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:18:10,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 7] total 46 [2022-11-26 01:18:10,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132918821] [2022-11-26 01:18:10,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:18:10,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-26 01:18:10,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:18:10,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-26 01:18:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=5879, Unknown=86, NotChecked=0, Total=6320 [2022-11-26 01:18:10,782 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 46 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 22 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (34), 19 states have call predecessors, (34), 20 states have call successors, (34) [2022-11-26 01:18:26,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:18:39,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:19:27,831 WARN L233 SmtUtils]: Spent 35.60s on a formula simplification that was a NOOP. DAG size: 216 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:19:41,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:19:43,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:19:55,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:19:57,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:19:59,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:20:01,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:20:03,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:20:05,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 01:20:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:20:46,636 INFO L93 Difference]: Finished difference Result 238 states and 306 transitions. [2022-11-26 01:20:46,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-26 01:20:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 22 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (34), 19 states have call predecessors, (34), 20 states have call successors, (34) Word has length 70 [2022-11-26 01:20:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:20:46,639 INFO L225 Difference]: With dead ends: 238 [2022-11-26 01:20:46,639 INFO L226 Difference]: Without dead ends: 165 [2022-11-26 01:20:46,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 145 SyntacticMatches, 10 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4895 ImplicationChecksByTransitivity, 244.8s TimeCoverageRelationStatistics Valid=878, Invalid=12892, Unknown=272, NotChecked=0, Total=14042 [2022-11-26 01:20:46,645 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 335 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 255 mSolverCounterUnsat, 274 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 274 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.9s IncrementalHoareTripleChecker+Time [2022-11-26 01:20:46,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 639 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2353 Invalid, 274 Unknown, 0 Unchecked, 52.9s Time] [2022-11-26 01:20:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-26 01:20:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 136. [2022-11-26 01:20:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 80 states have internal predecessors, (86), 36 states have call successors, (36), 22 states have call predecessors, (36), 22 states have return successors, (38), 33 states have call predecessors, (38), 35 states have call successors, (38) [2022-11-26 01:20:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2022-11-26 01:20:46,763 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 70 [2022-11-26 01:20:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:20:46,764 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2022-11-26 01:20:46,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 40 states have (on average 2.25) internal successors, (90), 39 states have internal predecessors, (90), 22 states have call successors, (38), 13 states have call predecessors, (38), 14 states have return successors, (34), 19 states have call predecessors, (34), 20 states have call successors, (34) [2022-11-26 01:20:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2022-11-26 01:20:46,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 01:20:46,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:20:46,766 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 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 01:20:46,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-26 01:20:46,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 01:20:46,973 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:20:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:20:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1576417214, now seen corresponding path program 1 times [2022-11-26 01:20:46,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:20:46,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264436544] [2022-11-26 01:20:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:20:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:20:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:20:52,313 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-26 01:20:52,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:20:52,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264436544] [2022-11-26 01:20:52,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264436544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:20:52,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211883370] [2022-11-26 01:20:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:20:52,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:20:52,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:20:52,315 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:20:52,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c6d6cdd-dd8a-405c-8384-c5bd6cd51c7a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 01:20:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:20:52,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 158 conjunts are in the unsatisfiable core [2022-11-26 01:20:52,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:20:52,682 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 6 treesize of output 5 [2022-11-26 01:20:53,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 01:20:53,727 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 01:20:53,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 01:20:53,742 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 01:20:53,778 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-26 01:20:53,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-26 01:20:53,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-26 01:20:53,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-26 01:20:54,105 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-26 01:20:54,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 122 [2022-11-26 01:20:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:54,117 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 108 treesize of output 90 [2022-11-26 01:20:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:54,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 25 [2022-11-26 01:20:54,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-26 01:20:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:20:54,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2022-11-26 01:22:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 30 refuted. 2 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 01:22:02,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:22:20,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211883370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:22:20,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1726084616] [2022-11-26 01:22:20,348 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-26 01:22:20,348 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:22:20,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:22:20,349 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:22:20,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:22:20,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:20,493 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-26 01:22:20,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 46 [2022-11-26 01:22:20,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:20,668 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-26 01:22:20,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-26 01:22:20,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-26 01:22:20,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:20,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:20,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:22:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:20,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-26 01:22:21,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-26 01:22:21,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:21,149 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:22:21,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 01:22:21,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,408 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-26 01:22:21,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 62 [2022-11-26 01:22:21,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:21,538 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-26 01:22:21,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 16 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 103 [2022-11-26 01:22:21,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 28 [2022-11-26 01:22:21,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:22:21,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:21,907 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-26 01:22:21,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-26 01:22:21,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:22:22,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:22:22,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:22:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 01:22:22,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 13 [2022-11-26 01:22:22,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:22,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-26 01:22:22,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 01:22:22,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:22:22,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-26 01:22:22,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2022-11-26 01:22:22,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 19 [2022-11-26 01:22:22,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 01:22:22,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-26 01:22:22,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:22:22,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-11-26 01:22:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-26 01:22:22,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 01:22:22,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-26 01:22:23,059 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-26 01:22:24,353 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 107 for LOIs [2022-11-26 01:22:24,652 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 89 for LOIs [2022-11-26 01:22:24,752 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-26 01:22:25,624 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-26 01:22:25,627 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-26 01:22:25,647 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-26 01:22:25,719 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:22:34,699 WARN L233 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 93 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:23,422 WARN L233 SmtUtils]: Spent 12.48s on a formula simplification. DAG size of input: 89 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:36,723 WARN L233 SmtUtils]: Spent 12.51s on a formula simplification. DAG size of input: 91 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:23:36,725 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10256#(and (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24))) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 16)) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| 24)) 0))) (= |~#s_can_fail_allocator_static~0.base| 4) (= |~#s_can_fail_allocator_static~0.offset| 0) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_123 Int)) (and (<= (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0)) (= v_aws_linked_list_front_~list.base_BEFORE_CALL_123 (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0))) 1 0) 0) 0 1) 1) (<= 0 v_aws_linked_list_front_~list.base_BEFORE_CALL_123) (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0)) (= v_aws_linked_list_front_~list.base_BEFORE_CALL_123 (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (not (= (mod (ite (= v_aws_linked_list_front_~list.base_BEFORE_CALL_123 0) 0 1) 256) 0)) (<= 0 (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0)) (= v_aws_linked_list_front_~list.base_BEFORE_CALL_123 (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_123) 0))) 1 0) 0) 0 1)))) (<= 0 ~tl_last_error~0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-26 01:23:36,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:23:36,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 01:23:36,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 42] total 61 [2022-11-26 01:23:36,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711565658] [2022-11-26 01:23:36,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 01:23:36,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-26 01:23:36,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:23:36,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-26 01:23:36,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=10157, Unknown=244, NotChecked=0, Total=10920 [2022-11-26 01:23:36,730 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand has 61 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 49 states have internal predecessors, (83), 23 states have call successors, (30), 13 states have call predecessors, (30), 18 states have return successors, (27), 20 states have call predecessors, (27), 21 states have call successors, (27)