./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 6b4ec56b 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/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_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 19:48:42,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:48:42,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:48:42,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:48:42,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:48:42,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:48:42,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:48:42,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:48:42,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:48:42,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:48:42,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:48:42,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:48:42,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:48:42,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:48:42,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:48:42,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:48:42,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:48:42,638 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:48:42,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:48:42,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:48:42,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:48:42,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:48:42,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:48:42,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:48:42,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:48:42,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:48:42,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:48:42,666 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:48:42,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:48:42,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:48:42,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:48:42,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:48:42,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:48:42,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:48:42,676 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:48:42,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:48:42,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:48:42,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:48:42,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:48:42,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:48:42,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:48:42,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 19:48:42,726 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:48:42,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:48:42,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:48:42,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:48:42,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:48:42,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:48:42,729 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:48:42,729 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:48:42,729 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:48:42,730 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:48:42,731 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:48:42,731 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:48:42,731 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:48:42,732 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:48:42,732 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:48:42,732 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:48:42,733 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:48:42,733 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:48:42,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:48:42,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:48:42,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:48:42,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:48:42,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:48:42,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:48:42,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:48:42,735 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:48:42,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:48:42,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:48:42,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:48:42,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:48:42,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:48:42,737 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:48:42,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:48:42,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:48:42,738 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:48:42,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:48:42,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:48:42,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:48:42,739 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2022-11-20 19:48:43,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:48:43,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:48:43,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:48:43,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:48:43,103 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:48:43,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-20 19:48:46,256 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:48:46,699 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:48:46,699 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-20 19:48:46,741 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/data/9e6d7ecb5/945012f1bd1843428a1174fb9222b262/FLAG50b749f25 [2022-11-20 19:48:46,763 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/data/9e6d7ecb5/945012f1bd1843428a1174fb9222b262 [2022-11-20 19:48:46,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:48:46,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:48:46,772 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:48:46,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:48:46,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:48:46,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:48:46" (1/1) ... [2022-11-20 19:48:46,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0a9a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:46, skipping insertion in model container [2022-11-20 19:48:46,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:48:46" (1/1) ... [2022-11-20 19:48:46,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:48:46,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:48:47,163 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-20 19:48:47,171 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-20 19:48:48,160 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,161 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,163 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,164 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,166 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,193 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,201 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,204 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,205 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,208 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,209 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,209 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,210 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,598 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 19:48:48,599 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 19:48:48,600 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 19:48:48,602 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 19:48:48,603 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 19:48:48,604 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 19:48:48,604 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 19:48:48,605 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 19:48:48,606 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 19:48:48,607 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 19:48:48,801 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 19:48:48,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:48:48,870 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:48:48,900 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-20 19:48:48,902 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-20 19:48:48,956 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,956 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,957 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,957 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,958 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,964 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,964 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,965 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,966 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,967 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,967 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,968 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:48,968 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 19:48:49,017 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 19:48:49,027 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 19:48:49,027 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 19:48:49,028 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 19:48:49,030 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 19:48:49,030 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 19:48:49,031 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 19:48:49,032 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 19:48:49,032 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 19:48:49,033 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 19:48:49,065 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 19:48:49,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:48:49,385 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:48:49,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49 WrapperNode [2022-11-20 19:48:49,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:48:49,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:48:49,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:48:49,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:48:49,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,520 INFO L138 Inliner]: procedures = 679, calls = 1044, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 133 [2022-11-20 19:48:49,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:48:49,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:48:49,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:48:49,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:48:49,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,566 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:48:49,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:48:49,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:48:49,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:48:49,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (1/1) ... [2022-11-20 19:48:49,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:48:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:49,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:48:49,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:48:49,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:48:49,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 19:48:49,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 19:48:49,720 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-20 19:48:49,721 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-20 19:48:49,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 19:48:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-20 19:48:49,722 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-20 19:48:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:48:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 19:48:49,722 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2022-11-20 19:48:49,724 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2022-11-20 19:48:49,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:48:49,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:48:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-20 19:48:49,725 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-20 19:48:49,725 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 19:48:49,725 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 19:48:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:48:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 19:48:49,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 19:48:49,727 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-20 19:48:49,727 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-20 19:48:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-20 19:48:49,728 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-20 19:48:49,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:48:50,049 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:48:50,051 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:48:50,443 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:48:50,675 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:48:50,675 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 19:48:50,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:48:50 BoogieIcfgContainer [2022-11-20 19:48:50,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:48:50,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:48:50,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:48:50,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:48:50,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:48:46" (1/3) ... [2022-11-20 19:48:50,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246aa382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:48:50, skipping insertion in model container [2022-11-20 19:48:50,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:49" (2/3) ... [2022-11-20 19:48:50,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@246aa382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:48:50, skipping insertion in model container [2022-11-20 19:48:50,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:48:50" (3/3) ... [2022-11-20 19:48:50,697 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2022-11-20 19:48:50,719 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:48:50,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:48:50,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:48:50,788 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;@724757f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:48:50,788 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 19:48:50,793 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) [2022-11-20 19:48:50,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 19:48:50,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:50,803 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] [2022-11-20 19:48:50,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:50,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:50,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1216931554, now seen corresponding path program 1 times [2022-11-20 19:48:50,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:50,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735306942] [2022-11-20 19:48:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:50,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 19:48:51,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:51,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735306942] [2022-11-20 19:48:51,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735306942] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:51,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576141359] [2022-11-20 19:48:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:51,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:51,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:51,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:51,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:48:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:52,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-20 19:48:52,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:52,360 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 [2022-11-20 19:48:52,378 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 [2022-11-20 19:48:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:52,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:52,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:52,521 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 [2022-11-20 19:48:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:52,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:52,549 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 [2022-11-20 19:48:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 19:48:55,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:48:55,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576141359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:55,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:48:55,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 13 [2022-11-20 19:48:55,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043964167] [2022-11-20 19:48:55,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:48:55,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:48:55,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 19:48:55,545 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) [2022-11-20 19:48:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:55,976 INFO L93 Difference]: Finished difference Result 147 states and 212 transitions. [2022-11-20 19:48:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 19:48:55,978 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 [2022-11-20 19:48:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:55,993 INFO L225 Difference]: With dead ends: 147 [2022-11-20 19:48:55,994 INFO L226 Difference]: Without dead ends: 101 [2022-11-20 19:48:55,999 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 [2022-11-20 19:48:56,008 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 15 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:56,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 275 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-20 19:48:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-20 19:48:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 90. [2022-11-20 19:48:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (33), 30 states have call predecessors, (33), 32 states have call successors, (33) [2022-11-20 19:48:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 120 transitions. [2022-11-20 19:48:56,094 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 120 transitions. Word has length 52 [2022-11-20 19:48:56,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:56,095 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 120 transitions. [2022-11-20 19:48:56,095 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) [2022-11-20 19:48:56,095 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 120 transitions. [2022-11-20 19:48:56,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 19:48:56,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:56,101 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] [2022-11-20 19:48:56,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:56,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 19:48:56,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:56,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:56,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1311656922, now seen corresponding path program 1 times [2022-11-20 19:48:56,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:56,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634645846] [2022-11-20 19:48:56,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:56,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 19:48:56,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:56,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634645846] [2022-11-20 19:48:56,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634645846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:56,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559171060] [2022-11-20 19:48:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:56,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:56,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:56,715 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:56,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:48:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:56,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-20 19:48:56,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:56,949 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 [2022-11-20 19:48:57,103 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 [2022-11-20 19:48:57,134 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 [2022-11-20 19:48:57,208 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 19:48:57,208 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 [2022-11-20 19:48:57,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:57,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:57,221 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 [2022-11-20 19:48:57,226 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 [2022-11-20 19:48:57,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:57,243 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 [2022-11-20 19:48:57,253 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 [2022-11-20 19:48:57,370 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-20 19:48:57,370 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 [2022-11-20 19:48:57,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:57,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:57,406 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 [2022-11-20 19:48:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:57,420 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 [2022-11-20 19:48:57,432 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 [2022-11-20 19:48:57,448 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 [2022-11-20 19:48:57,453 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 [2022-11-20 19:48:57,467 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 [2022-11-20 19:49:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-20 19:49:00,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:49:08,852 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:08,853 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 [2022-11-20 19:49:08,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:08,864 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 [2022-11-20 19:49:08,879 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 [2022-11-20 19:49:08,892 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 [2022-11-20 19:49:09,371 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 [2022-11-20 19:49:09,384 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 [2022-11-20 19:49:09,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,425 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 [2022-11-20 19:49:09,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,538 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 [2022-11-20 19:49:09,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,550 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 [2022-11-20 19:49:09,558 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 [2022-11-20 19:49:09,568 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 [2022-11-20 19:49:09,603 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 [2022-11-20 19:49:09,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,626 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 [2022-11-20 19:49:09,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,707 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 [2022-11-20 19:49:09,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:09,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,733 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 [2022-11-20 19:49:09,746 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 [2022-11-20 19:49:09,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,769 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 [2022-11-20 19:49:09,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,790 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 [2022-11-20 19:49:09,805 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 [2022-11-20 19:49:09,819 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 [2022-11-20 19:49:09,894 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 [2022-11-20 19:49:09,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,916 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 [2022-11-20 19:49:09,966 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 [2022-11-20 19:49:09,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:09,989 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 [2022-11-20 19:49:10,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,039 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 [2022-11-20 19:49:10,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:10,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,053 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 [2022-11-20 19:49:10,062 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 [2022-11-20 19:49:10,085 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 [2022-11-20 19:49:10,101 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,101 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 [2022-11-20 19:49:10,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,163 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 [2022-11-20 19:49:10,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:10,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,197 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 [2022-11-20 19:49:10,211 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 [2022-11-20 19:49:10,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,235 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 [2022-11-20 19:49:10,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,257 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 [2022-11-20 19:49:10,273 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 [2022-11-20 19:49:10,289 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 [2022-11-20 19:49:10,349 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 [2022-11-20 19:49:10,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,367 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 [2022-11-20 19:49:10,434 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 [2022-11-20 19:49:10,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,459 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 [2022-11-20 19:49:10,533 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,534 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 [2022-11-20 19:49:10,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:10,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,547 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 [2022-11-20 19:49:10,556 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 [2022-11-20 19:49:10,592 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 [2022-11-20 19:49:10,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:49:10,609 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 [2022-11-20 19:49:10,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559171060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:10,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [866897104] [2022-11-20 19:49:11,020 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-20 19:49:11,020 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:49:11,024 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:49:11,030 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:49:11,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:49:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,149 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:49:11,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 61 [2022-11-20 19:49:11,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,174 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 [2022-11-20 19:49:11,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,527 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 [2022-11-20 19:49:11,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,562 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 [2022-11-20 19:49:11,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-20 19:49:11,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,617 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 [2022-11-20 19:49:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,702 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 [2022-11-20 19:49:11,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:11,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:11,766 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:49:11,769 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 [2022-11-20 19:49:11,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,807 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 [2022-11-20 19:49:11,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:11,867 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:49:11,867 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 [2022-11-20 19:49:11,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:11,984 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:49:11,984 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 [2022-11-20 19:49:12,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,024 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 [2022-11-20 19:49:12,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,133 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 [2022-11-20 19:49:12,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,164 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 [2022-11-20 19:49:12,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:12,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,182 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 [2022-11-20 19:49:12,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,205 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 [2022-11-20 19:49:12,226 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 [2022-11-20 19:49:12,240 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 [2022-11-20 19:49:12,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 19:49:12,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:49:12,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 23 [2022-11-20 19:49:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,367 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 [2022-11-20 19:49:12,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,388 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 [2022-11-20 19:49:12,402 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 [2022-11-20 19:49:12,414 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 [2022-11-20 19:49:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 19:49:12,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,474 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 [2022-11-20 19:49:12,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,496 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 [2022-11-20 19:49:12,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:12,523 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 [2022-11-20 19:49:13,524 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-20 19:49:13,921 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 44 for LOIs [2022-11-20 19:49:14,022 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 71 for LOIs [2022-11-20 19:49:14,273 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 30 for LOIs [2022-11-20 19:49:14,278 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-20 19:49:14,302 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:49:20,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [866897104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:49:20,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:49:20,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [5, 11] total 35 [2022-11-20 19:49:20,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531255403] [2022-11-20 19:49:20,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:49:20,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 19:49:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:20,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 19:49:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1649, Unknown=2, NotChecked=0, Total=1806 [2022-11-20 19:49:20,012 INFO L87 Difference]: Start difference. First operand 90 states and 120 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) [2022-11-20 19:49:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:49:20,458 INFO L93 Difference]: Finished difference Result 174 states and 217 transitions. [2022-11-20 19:49:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 19:49:20,460 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 [2022-11-20 19:49:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:49:20,461 INFO L225 Difference]: With dead ends: 174 [2022-11-20 19:49:20,462 INFO L226 Difference]: Without dead ends: 101 [2022-11-20 19:49:20,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 98 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=155, Invalid=1649, Unknown=2, NotChecked=0, Total=1806 [2022-11-20 19:49:20,464 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 22 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:49:20,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 601 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 157 Invalid, 0 Unknown, 289 Unchecked, 0.4s Time] [2022-11-20 19:49:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-20 19:49:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2022-11-20 19:49:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 48 states have (on average 1.1875) internal successors, (57), 49 states have internal predecessors, (57), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-20 19:49:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2022-11-20 19:49:20,501 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 53 [2022-11-20 19:49:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:20,502 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2022-11-20 19:49:20,502 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) [2022-11-20 19:49:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2022-11-20 19:49:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 19:49:20,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:20,504 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] [2022-11-20 19:49:20,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:49:20,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:20,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:20,711 INFO L85 PathProgramCache]: Analyzing trace with hash -662497062, now seen corresponding path program 1 times [2022-11-20 19:49:20,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:20,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18824925] [2022-11-20 19:49:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:20,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 19:49:20,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:20,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18824925] [2022-11-20 19:49:20,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18824925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:20,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287671153] [2022-11-20 19:49:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:20,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:20,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:49:20,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:49:20,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:49:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:21,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:49:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:49:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:49:21,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:49:21,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287671153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:49:21,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:49:21,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-11-20 19:49:21,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395487868] [2022-11-20 19:49:21,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:49:21,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:49:21,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:49:21,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:49:21,313 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-11-20 19:49:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:49:21,596 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2022-11-20 19:49:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:49:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 54 [2022-11-20 19:49:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:49:21,602 INFO L225 Difference]: With dead ends: 158 [2022-11-20 19:49:21,602 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 19:49:21,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-20 19:49:21,605 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 45 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 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 [2022-11-20 19:49:21,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 373 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:49:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 19:49:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-20 19:49:21,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-20 19:49:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2022-11-20 19:49:21,636 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 54 [2022-11-20 19:49:21,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:21,637 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2022-11-20 19:49:21,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-11-20 19:49:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2022-11-20 19:49:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 19:49:21,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:21,639 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] [2022-11-20 19:49:21,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 19:49:21,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:21,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:21,846 INFO L85 PathProgramCache]: Analyzing trace with hash 630654178, now seen corresponding path program 1 times [2022-11-20 19:49:21,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:21,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404085089] [2022-11-20 19:49:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:21,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 19:49:22,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:22,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404085089] [2022-11-20 19:49:22,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404085089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:22,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255286420] [2022-11-20 19:49:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:22,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:22,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:49:22,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:49:22,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:49:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 19:49:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:49:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:49:22,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:49:22,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255286420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:49:22,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:49:22,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2022-11-20 19:49:22,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258235191] [2022-11-20 19:49:22,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:49:22,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 19:49:22,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:22,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 19:49:22,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-11-20 19:49:22,478 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2022-11-20 19:49:22,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:49:22,793 INFO L93 Difference]: Finished difference Result 169 states and 211 transitions. [2022-11-20 19:49:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 19:49:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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 56 [2022-11-20 19:49:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:49:22,799 INFO L225 Difference]: With dead ends: 169 [2022-11-20 19:49:22,799 INFO L226 Difference]: Without dead ends: 102 [2022-11-20 19:49:22,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:49:22,803 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 74 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 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 [2022-11-20 19:49:22,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 417 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:49:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-20 19:49:22,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2022-11-20 19:49:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 50 states have (on average 1.16) internal successors, (58), 52 states have internal predecessors, (58), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-20 19:49:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2022-11-20 19:49:22,844 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 56 [2022-11-20 19:49:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:22,845 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2022-11-20 19:49:22,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 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) [2022-11-20 19:49:22,871 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2022-11-20 19:49:22,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 19:49:22,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:22,873 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] [2022-11-20 19:49:22,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 19:49:23,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:23,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:23,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:23,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1929682501, now seen corresponding path program 1 times [2022-11-20 19:49:23,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:23,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903217671] [2022-11-20 19:49:23,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:23,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 19:49:23,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903217671] [2022-11-20 19:49:23,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903217671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043364915] [2022-11-20 19:49:23,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:23,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:23,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:49:23,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:49:23,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 19:49:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:23,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:49:23,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:49:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 19:49:23,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:49:23,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043364915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:49:23,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:49:23,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-11-20 19:49:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923310692] [2022-11-20 19:49:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:49:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:49:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:49:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:49:23,620 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (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) [2022-11-20 19:49:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:49:23,695 INFO L93 Difference]: Finished difference Result 165 states and 207 transitions. [2022-11-20 19:49:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:49:23,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (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 57 [2022-11-20 19:49:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:49:23,701 INFO L225 Difference]: With dead ends: 165 [2022-11-20 19:49:23,701 INFO L226 Difference]: Without dead ends: 101 [2022-11-20 19:49:23,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:49:23,703 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 [2022-11-20 19:49:23,704 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] [2022-11-20 19:49:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-20 19:49:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2022-11-20 19:49:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 53 states have internal predecessors, (59), 28 states have call successors, (28), 16 states have call predecessors, (28), 16 states have return successors, (29), 26 states have call predecessors, (29), 27 states have call successors, (29) [2022-11-20 19:49:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2022-11-20 19:49:23,752 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 57 [2022-11-20 19:49:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:23,752 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2022-11-20 19:49:23,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (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) [2022-11-20 19:49:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2022-11-20 19:49:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 19:49:23,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:23,758 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] [2022-11-20 19:49:23,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:49:23,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:23,971 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:23,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:23,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1947211257, now seen corresponding path program 1 times [2022-11-20 19:49:23,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:23,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40636921] [2022-11-20 19:49:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:23,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-20 19:49:24,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40636921] [2022-11-20 19:49:24,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40636921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709915117] [2022-11-20 19:49:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:24,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:24,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:49:24,289 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:49:24,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:49:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:24,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 19:49:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:49:24,583 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 19:49:24,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 19:49:24,602 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 19:49:24,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-20 19:49:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 19:49:31,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:49:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 19:49:35,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709915117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:49:35,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589076110] [2022-11-20 19:49:35,558 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-20 19:49:35,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:49:35,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:49:35,559 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:49:35,559 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:49:35,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,650 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:49:35,650 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 [2022-11-20 19:49:35,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,672 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 [2022-11-20 19:49:35,948 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 [2022-11-20 19:49:35,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,967 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 [2022-11-20 19:49:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:35,999 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 [2022-11-20 19:49:36,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,035 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 [2022-11-20 19:49:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,105 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 [2022-11-20 19:49:36,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,150 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 [2022-11-20 19:49:36,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,195 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 [2022-11-20 19:49:36,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:36,236 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 [2022-11-20 19:49:36,868 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 122 for LOIs [2022-11-20 19:49:37,042 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:49:37,045 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-20 19:49:37,066 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:49:42,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1589076110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:49:42,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:49:42,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 13, 7] total 32 [2022-11-20 19:49:42,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762909739] [2022-11-20 19:49:42,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:49:42,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 19:49:42,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:42,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 19:49:42,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-11-20 19:49:42,826 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 13 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-11-20 19:49:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:49:43,532 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2022-11-20 19:49:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 19:49:43,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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 60 [2022-11-20 19:49:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:49:43,534 INFO L225 Difference]: With dead ends: 168 [2022-11-20 19:49:43,534 INFO L226 Difference]: Without dead ends: 89 [2022-11-20 19:49:43,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-11-20 19:49:43,536 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 87 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:49:43,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 169 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 205 Invalid, 0 Unknown, 58 Unchecked, 0.7s Time] [2022-11-20 19:49:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-20 19:49:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-11-20 19:49:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 49 states have internal predecessors, (55), 25 states have call successors, (25), 14 states have call predecessors, (25), 14 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-11-20 19:49:43,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2022-11-20 19:49:43,560 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 60 [2022-11-20 19:49:43,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:49:43,561 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2022-11-20 19:49:43,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 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) [2022-11-20 19:49:43,561 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2022-11-20 19:49:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 19:49:43,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:43,562 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] [2022-11-20 19:49:43,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:49:43,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 19:49:43,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:49:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1650262769, now seen corresponding path program 1 times [2022-11-20 19:49:43,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:43,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066753856] [2022-11-20 19:49:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:43,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 19:49:44,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:44,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066753856] [2022-11-20 19:49:44,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066753856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:49:44,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954999338] [2022-11-20 19:49:44,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:44,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:44,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:49:44,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:49:44,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 19:49:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:44,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 19:49:44,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:49:44,352 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 [2022-11-20 19:49:44,530 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 19:49:44,531 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 [2022-11-20 19:49:44,540 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 19:49:44,543 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 [2022-11-20 19:49:44,601 INFO L321 Elim1Store]: treesize reduction 42, result has 20.8 percent of original size [2022-11-20 19:49:44,601 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 [2022-11-20 19:49:44,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:49:44,607 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 [2022-11-20 19:49:44,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-20 19:49:44,627 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 [2022-11-20 19:49:44,634 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 [2022-11-20 19:49:44,638 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 [2022-11-20 19:49:54,473 WARN L233 SmtUtils]: Spent 5.66s 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) [2022-11-20 19:50:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:50:01,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:50:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 19:50:05,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954999338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:50:05,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2079120451] [2022-11-20 19:50:05,518 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-20 19:50:05,519 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:50:05,519 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:50:05,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:50:05,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:50:05,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,592 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:50:05,593 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 [2022-11-20 19:50:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,619 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 [2022-11-20 19:50:05,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,867 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 [2022-11-20 19:50:05,898 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 [2022-11-20 19:50:05,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 77 [2022-11-20 19:50:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:05,958 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 [2022-11-20 19:50:06,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,028 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 [2022-11-20 19:50:06,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,129 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:50:06,129 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 [2022-11-20 19:50:06,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:06,174 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 [2022-11-20 19:50:06,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 17 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2022-11-20 19:50:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,238 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 [2022-11-20 19:50:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,270 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 [2022-11-20 19:50:06,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:06,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:06,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:06,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:06,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:06,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:07,003 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-20 19:50:07,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 12 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 662 treesize of output 671 [2022-11-20 19:50:07,699 INFO L321 Elim1Store]: treesize reduction 192, result has 23.5 percent of original size [2022-11-20 19:50:07,700 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 [2022-11-20 19:50:07,905 INFO L321 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2022-11-20 19:50:07,906 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 639 treesize of output 650 [2022-11-20 19:50:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:08,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:08,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:08,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:08,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:08,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:08,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:08,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:08,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:08,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:08,279 INFO L321 Elim1Store]: treesize reduction 233, result has 25.6 percent of original size [2022-11-20 19:50:08,279 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 684 treesize of output 687 [2022-11-20 19:50:08,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:08,342 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 [2022-11-20 19:50:08,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:08,408 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-20 19:50:08,408 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 [2022-11-20 19:50:08,443 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 [2022-11-20 19:50:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:12,949 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 [2022-11-20 19:50:12,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:12,978 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 [2022-11-20 19:50:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:12,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:12,996 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 [2022-11-20 19:50:13,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:13,027 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 [2022-11-20 19:50:13,041 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 [2022-11-20 19:50:13,054 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 [2022-11-20 19:50:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:13,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:13,085 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 [2022-11-20 19:50:13,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:13,105 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 [2022-11-20 19:50:13,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:13,125 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 [2022-11-20 19:50:13,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:13,144 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 [2022-11-20 19:50:13,478 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 79 for LOIs [2022-11-20 19:50:13,947 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 49 for LOIs [2022-11-20 19:50:14,046 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 79 for LOIs [2022-11-20 19:50:14,543 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-20 19:50:14,551 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-20 19:50:14,572 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 25 for LOIs [2022-11-20 19:50:14,639 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:50:23,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2079120451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:50:23,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:50:23,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [6, 16, 7] total 53 [2022-11-20 19:50:23,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863947027] [2022-11-20 19:50:23,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:50:23,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 19:50:23,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:50:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 19:50:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=2545, Unknown=1, NotChecked=0, Total=2756 [2022-11-20 19:50:23,180 INFO L87 Difference]: Start difference. First operand 88 states and 106 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) [2022-11-20 19:50:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:50:24,717 INFO L93 Difference]: Finished difference Result 173 states and 205 transitions. [2022-11-20 19:50:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 19:50:24,719 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 [2022-11-20 19:50:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:50:24,720 INFO L225 Difference]: With dead ends: 173 [2022-11-20 19:50:24,720 INFO L226 Difference]: Without dead ends: 103 [2022-11-20 19:50:24,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 119 SyntacticMatches, 17 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=228, Invalid=2741, Unknown=1, NotChecked=0, Total=2970 [2022-11-20 19:50:24,723 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 47 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 19:50:24,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 395 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 330 Invalid, 0 Unknown, 337 Unchecked, 0.8s Time] [2022-11-20 19:50:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-20 19:50:24,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2022-11-20 19:50:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 59 states have internal predecessors, (65), 26 states have call successors, (26), 15 states have call predecessors, (26), 16 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2022-11-20 19:50:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2022-11-20 19:50:24,755 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 61 [2022-11-20 19:50:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:50:24,756 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2022-11-20 19:50:24,756 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) [2022-11-20 19:50:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2022-11-20 19:50:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 19:50:24,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:50:24,758 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] [2022-11-20 19:50:24,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:50:24,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 19:50:24,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:50:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:50:24,965 INFO L85 PathProgramCache]: Analyzing trace with hash 575582167, now seen corresponding path program 1 times [2022-11-20 19:50:24,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:50:24,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500832869] [2022-11-20 19:50:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:50:24,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:50:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:50:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-20 19:50:26,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:50:26,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500832869] [2022-11-20 19:50:26,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500832869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:50:26,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362169879] [2022-11-20 19:50:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:50:26,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:50:26,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:50:26,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:50:26,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 19:50:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:50:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 19:50:26,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:50:26,564 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 [2022-11-20 19:50:26,794 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 19:50:26,794 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 [2022-11-20 19:50:26,801 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 19:50:26,805 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 [2022-11-20 19:50:26,873 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-20 19:50:26,873 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 [2022-11-20 19:50:26,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:26,882 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 [2022-11-20 19:50:26,890 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 [2022-11-20 19:50:26,991 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73| Int) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73| v_DerPreprocessor_25) .cse0 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73| v_DerPreprocessor_25) .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_25 24)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73|)))))) is different from true [2022-11-20 19:50:27,191 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73| Int) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73| v_DerPreprocessor_25) .cse0 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73| v_DerPreprocessor_25) .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_25 24)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73|)))))) (exists ((v_DerPreprocessor_26 (Array Int Int)) (v_DerPreprocessor_27 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74| Int)) (let ((.cse3 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74|))) (let ((.cse2 (select .cse3 0))) (and (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_26) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74| v_DerPreprocessor_27) .cse2 v_DerPreprocessor_26) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74| v_DerPreprocessor_27) .cse2)) (= (select .cse3 24) (select v_DerPreprocessor_27 24)) (not (= .cse2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74|)) (not (= .cse2 0))))))) is different from true [2022-11-20 19:50:27,692 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73| Int) (v_DerPreprocessor_24 (Array Int Int)) (v_DerPreprocessor_25 (Array Int Int))) (let ((.cse1 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73|))) (let ((.cse0 (select .cse1 0))) (and (not (= .cse0 0)) (= (select |c_#memory_$Pointer$.base| .cse0) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73| v_DerPreprocessor_25) .cse0 v_DerPreprocessor_24) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73| v_DerPreprocessor_25) .cse0)) (= (select .cse1 24) (select v_DerPreprocessor_25 24)) (not (= .cse0 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_73|)))))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_50 Int) (v_DerPreprocessor_28 (Array Int Int)) (v_DerPreprocessor_29 (Array Int Int))) (let ((.cse3 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_50))) (let ((.cse2 (select .cse3 0))) (and (not (= .cse2 0)) (= (select .cse3 24) (select v_DerPreprocessor_29 24)) (not (= v_aws_linked_list_front_~list.base_BEFORE_CALL_50 .cse2)) (= (select |c_#memory_$Pointer$.base| .cse2) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse2 v_DerPreprocessor_28) v_aws_linked_list_front_~list.base_BEFORE_CALL_50 v_DerPreprocessor_29) .cse2 v_DerPreprocessor_28) v_aws_linked_list_front_~list.base_BEFORE_CALL_50 v_DerPreprocessor_29) .cse2)))))) (exists ((v_DerPreprocessor_26 (Array Int Int)) (v_DerPreprocessor_27 (Array Int Int)) (|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74| Int)) (let ((.cse5 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74|))) (let ((.cse4 (select .cse5 0))) (and (= (select |c_#memory_$Pointer$.base| .cse4) (select (store (store (store (store |c_#memory_$Pointer$.base| .cse4 v_DerPreprocessor_26) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74| v_DerPreprocessor_27) .cse4 v_DerPreprocessor_26) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74| v_DerPreprocessor_27) .cse4)) (= (select .cse5 24) (select v_DerPreprocessor_27 24)) (not (= .cse4 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_74|)) (not (= .cse4 0))))))) is different from true [2022-11-20 19:50:28,797 INFO L321 Elim1Store]: treesize reduction 224, result has 0.4 percent of original size [2022-11-20 19:50:28,797 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 [2022-11-20 19:50:28,808 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 [2022-11-20 19:50:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 6 not checked. [2022-11-20 19:50:28,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:50:29,389 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_768 (Array Int Int)) (v_ArrVal_769 (Array Int Int)) (v_ArrVal_767 Int)) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_768) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_769) |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_767)) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base|) |c_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.offset|) 0))) is different from false [2022-11-20 19:50:29,400 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:29,401 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 [2022-11-20 19:50:29,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:29,418 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 154 treesize of output 156 [2022-11-20 19:50:29,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 140 [2022-11-20 19:50:29,432 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 140 treesize of output 138 [2022-11-20 19:50:29,539 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 [2022-11-20 19:50:29,553 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 [2022-11-20 19:50:29,568 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:29,568 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 98 treesize of output 94 [2022-11-20 19:50:29,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362169879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:50:29,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376786533] [2022-11-20 19:50:29,973 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-20 19:50:29,973 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:50:29,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:50:29,974 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:50:29,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:50:30,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,043 INFO L321 Elim1Store]: treesize reduction 34, result has 41.4 percent of original size [2022-11-20 19:50:30,044 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 [2022-11-20 19:50:30,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,103 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:50:30,103 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 [2022-11-20 19:50:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,336 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 [2022-11-20 19:50:30,362 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 24 treesize of output 9 [2022-11-20 19:50:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,383 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 [2022-11-20 19:50:30,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,416 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 [2022-11-20 19:50:30,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,527 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:50:30,527 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 [2022-11-20 19:50:30,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,557 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 [2022-11-20 19:50:30,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,584 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 [2022-11-20 19:50:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,609 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 [2022-11-20 19:50:30,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,643 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 [2022-11-20 19:50:30,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:30,678 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 [2022-11-20 19:50:30,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:30,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:30,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:30,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:30,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:30,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:30,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:31,274 INFO L321 Elim1Store]: treesize reduction 227, result has 25.3 percent of original size [2022-11-20 19:50:31,275 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 [2022-11-20 19:50:31,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:31,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:31,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:31,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:31,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:31,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:31,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:31,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:31,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:31,730 INFO L321 Elim1Store]: treesize reduction 233, result has 26.3 percent of original size [2022-11-20 19:50:31,731 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 680 treesize of output 689 [2022-11-20 19:50:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:31,773 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 [2022-11-20 19:50:31,982 INFO L321 Elim1Store]: treesize reduction 152, result has 18.7 percent of original size [2022-11-20 19:50:31,983 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 [2022-11-20 19:50:32,223 INFO L321 Elim1Store]: treesize reduction 208, result has 17.1 percent of original size [2022-11-20 19:50:32,223 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 [2022-11-20 19:50:32,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:32,303 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-20 19:50:32,303 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 [2022-11-20 19:50:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:32,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:32,334 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 [2022-11-20 19:50:36,534 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 [2022-11-20 19:50:36,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:36,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:36,555 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 [2022-11-20 19:50:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:36,579 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 [2022-11-20 19:50:36,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:36,598 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 [2022-11-20 19:50:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:36,609 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 [2022-11-20 19:50:36,621 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 [2022-11-20 19:50:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:36,650 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 [2022-11-20 19:50:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:36,662 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 [2022-11-20 19:50:36,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:36,680 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 [2022-11-20 19:50:36,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:36,700 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 [2022-11-20 19:50:37,282 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-20 19:50:37,748 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 43 for LOIs [2022-11-20 19:50:37,823 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 73 for LOIs [2022-11-20 19:50:38,700 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 61 for LOIs [2022-11-20 19:50:38,719 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-20 19:50:38,738 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:50:38,800 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:50:47,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1376786533] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:50:47,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:50:47,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 18] total 54 [2022-11-20 19:50:47,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727983797] [2022-11-20 19:50:47,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:50:47,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 19:50:47,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:50:47,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 19:50:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=3416, Unknown=14, NotChecked=484, Total=4160 [2022-11-20 19:50:47,908 INFO L87 Difference]: Start difference. First operand 100 states and 119 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) [2022-11-20 19:50:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:50:49,542 INFO L93 Difference]: Finished difference Result 187 states and 220 transitions. [2022-11-20 19:50:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 19:50:49,543 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 [2022-11-20 19:50:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:50:49,544 INFO L225 Difference]: With dead ends: 187 [2022-11-20 19:50:49,544 INFO L226 Difference]: Without dead ends: 112 [2022-11-20 19:50:49,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=271, Invalid=3763, Unknown=14, NotChecked=508, Total=4556 [2022-11-20 19:50:49,547 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 46 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 19:50:49,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 710 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 348 Invalid, 0 Unknown, 222 Unchecked, 0.8s Time] [2022-11-20 19:50:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-20 19:50:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2022-11-20 19:50:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 27 states have call successors, (27), 16 states have call predecessors, (27), 16 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-11-20 19:50:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2022-11-20 19:50:49,583 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 63 [2022-11-20 19:50:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:50:49,583 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2022-11-20 19:50:49,584 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) [2022-11-20 19:50:49,584 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2022-11-20 19:50:49,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 19:50:49,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:50:49,585 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] [2022-11-20 19:50:49,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-20 19:50:49,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:50:49,792 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:50:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:50:49,793 INFO L85 PathProgramCache]: Analyzing trace with hash 658052454, now seen corresponding path program 1 times [2022-11-20 19:50:49,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:50:49,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780966162] [2022-11-20 19:50:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:50:49,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:50:49,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:50:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 19:50:51,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:50:51,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780966162] [2022-11-20 19:50:51,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780966162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:50:51,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449833056] [2022-11-20 19:50:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:50:51,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:50:51,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:50:51,313 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:50:51,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:50:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:50:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-20 19:50:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:50:51,601 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 [2022-11-20 19:50:51,760 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 [2022-11-20 19:50:51,774 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 19:50:51,774 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 [2022-11-20 19:50:51,780 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 [2022-11-20 19:50:51,796 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 19:50:51,797 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 [2022-11-20 19:50:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:51,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 21 [2022-11-20 19:50:51,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:51,872 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 [2022-11-20 19:50:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 19:50:52,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:50:52,900 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 Int) (v_ArrVal_891 (Array Int Int)) (v_ArrVal_894 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_894) |c_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base| (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_ensure_linked_list_is_allocated_~curr~0#1.base| v_ArrVal_891) |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_893)) |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 [2022-11-20 19:50:52,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:52,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-11-20 19:50:52,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:52,933 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 [2022-11-20 19:50:52,942 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 [2022-11-20 19:50:52,951 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 [2022-11-20 19:50:53,007 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 [2022-11-20 19:50:53,030 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 6 [2022-11-20 19:50:53,058 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:53,058 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 65 treesize of output 67 [2022-11-20 19:50:53,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,158 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 19:50:53,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449833056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:50:53,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331159833] [2022-11-20 19:50:53,609 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-20 19:50:53,610 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:50:53,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:50:53,610 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:50:53,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:50:53,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,693 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:50:53,693 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 [2022-11-20 19:50:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,711 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 [2022-11-20 19:50:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,944 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 [2022-11-20 19:50:53,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2022-11-20 19:50:53,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,002 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 [2022-11-20 19:50:54,035 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 [2022-11-20 19:50:54,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,088 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 [2022-11-20 19:50:54,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:54,138 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:50:54,138 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 [2022-11-20 19:50:54,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,172 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 [2022-11-20 19:50:54,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,244 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-20 19:50:54,244 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 [2022-11-20 19:50:54,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,336 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:50:54,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 17 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 42 treesize of output 73 [2022-11-20 19:50:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,373 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 [2022-11-20 19:50:54,452 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 [2022-11-20 19:50:54,462 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 [2022-11-20 19:50:54,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:54,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 19:50:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-20 19:50:54,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2022-11-20 19:50:54,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,582 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 [2022-11-20 19:50:54,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,631 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 [2022-11-20 19:50:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,645 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 [2022-11-20 19:50:54,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,671 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 [2022-11-20 19:50:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:54,688 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 [2022-11-20 19:50:55,698 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-20 19:50:56,570 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 107 for LOIs [2022-11-20 19:50:56,908 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-20 19:50:56,951 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 111 for LOIs [2022-11-20 19:50:58,593 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:50:58,594 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-20 19:50:58,613 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:50:58,677 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:51:16,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5894#(and (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| Int)) (and (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24)))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70|) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 0) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24)) 0) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_72|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_70| 24)))))) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| Int)) (and (not (= 0 (mod (ite (= (ite (= (mod (ite (= (ite (and (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256))) (<= 0 (ite (= (ite (and (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0))) 1 0) 0) 0 1)) (<= 0 |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) (not (= (mod (ite (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| 0) 0 1) 256) 0)) (<= (ite (= (ite (and (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29| (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0)) (= 16 (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_29|) 0))) 1 0) 0) 0 1) 1))) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:51:16,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:51:16,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:51:16,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-20 19:51:16,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129481182] [2022-11-20 19:51:16,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:51:16,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 19:51:16,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:51:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 19:51:16,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=4554, Unknown=1, NotChecked=136, Total=4970 [2022-11-20 19:51:16,316 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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) [2022-11-20 19:51:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:17,032 INFO L93 Difference]: Finished difference Result 241 states and 304 transitions. [2022-11-20 19:51:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 19:51:17,033 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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 [2022-11-20 19:51:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:17,035 INFO L225 Difference]: With dead ends: 241 [2022-11-20 19:51:17,035 INFO L226 Difference]: Without dead ends: 174 [2022-11-20 19:51:17,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 117 SyntacticMatches, 15 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=320, Invalid=5085, Unknown=1, NotChecked=144, Total=5550 [2022-11-20 19:51:17,037 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 40 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:17,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1064 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 421 Invalid, 0 Unknown, 196 Unchecked, 0.5s Time] [2022-11-20 19:51:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-20 19:51:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 160. [2022-11-20 19:51:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 95 states have internal predecessors, (106), 44 states have call successors, (44), 22 states have call predecessors, (44), 23 states have return successors, (47), 42 states have call predecessors, (47), 43 states have call successors, (47) [2022-11-20 19:51:17,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 197 transitions. [2022-11-20 19:51:17,086 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 197 transitions. Word has length 64 [2022-11-20 19:51:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:17,087 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 197 transitions. [2022-11-20 19:51:17,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 24 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) [2022-11-20 19:51:17,087 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 197 transitions. [2022-11-20 19:51:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 19:51:17,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:17,088 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:51:17,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:17,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:17,291 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:51:17,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:17,291 INFO L85 PathProgramCache]: Analyzing trace with hash 865821806, now seen corresponding path program 2 times [2022-11-20 19:51:17,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:51:17,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310596867] [2022-11-20 19:51:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:51:17,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:51:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:51:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 19:51:19,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:51:19,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310596867] [2022-11-20 19:51:19,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310596867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:51:19,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874710882] [2022-11-20 19:51:19,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:51:19,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:19,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:51:19,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:51:19,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 19:51:19,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 19:51:19,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:51:19,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 19:51:19,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:19,839 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-20 19:51:19,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-20 19:51:19,878 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2022-11-20 19:51:19,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2022-11-20 19:51:19,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-20 19:51:19,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-20 19:51:19,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-20 19:51:19,940 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 [2022-11-20 19:51:19,976 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 63 treesize of output 27 [2022-11-20 19:51:19,981 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 [2022-11-20 19:51:20,017 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 [2022-11-20 19:51:20,022 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 [2022-11-20 19:51:20,298 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 17 treesize of output 11 [2022-11-20 19:51:20,313 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|) 24))) (and (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| v_DerPreprocessor_50) .cse0 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| v_DerPreprocessor_50) .cse0) (select |c_#memory_$Pointer$.offset| .cse0)) (= (select v_DerPreprocessor_50 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|) 24)))) (not (= .cse0 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|)))) (exists ((v_arrayElimCell_458 Int)) (and (= (select (select |c_#memory_$Pointer$.base| v_arrayElimCell_458) 24) v_arrayElimCell_458) (<= 2 v_arrayElimCell_458)))) is different from true [2022-11-20 19:51:20,763 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 17 treesize of output 11 [2022-11-20 19:51:20,780 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|) 24))) (and (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| v_DerPreprocessor_50) .cse0 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| v_DerPreprocessor_50) .cse0) (select |c_#memory_$Pointer$.offset| .cse0)) (= (select v_DerPreprocessor_50 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|) 24)))) (not (= .cse0 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|)))) (exists ((v_arrayElimCell_458 Int)) (and (= (select (select |c_#memory_$Pointer$.base| v_arrayElimCell_458) 24) v_arrayElimCell_458) (<= 2 v_arrayElimCell_458)))) (or (exists ((v_arrayElimCell_459 Int)) (and (<= 2 v_arrayElimCell_459) (= (select (select |c_#memory_$Pointer$.base| v_arrayElimCell_459) 24) v_arrayElimCell_459))) (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114|) 24))) (and (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select v_DerPreprocessor_50 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114|) 24)) (= (select |c_#memory_$Pointer$.offset| .cse1) (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse1 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114| v_DerPreprocessor_50) .cse1 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114| v_DerPreprocessor_50) .cse1)))) (not (= .cse1 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114|)))))) is different from true [2022-11-20 19:51:22,165 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 17 treesize of output 11 [2022-11-20 19:52:13,614 WARN L233 SmtUtils]: Spent 35.16s on a formula simplification that was a NOOP. DAG size: 155 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:52:21,243 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 47 [2022-11-20 19:52:21,292 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 47 [2022-11-20 19:52:21,368 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_76 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_76) 24))) (and (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_76) (not (= .cse0 0)) (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_76) 24) (select v_DerPreprocessor_50 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_76 v_DerPreprocessor_50) .cse0 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_76 v_DerPreprocessor_50) .cse0) (select |c_#memory_$Pointer$.offset| .cse0))))))) (exists ((v_arrayElimCell_460 Int)) (and (<= 2 v_arrayElimCell_460) (= (select (select |c_#memory_$Pointer$.base| v_arrayElimCell_460) 24) v_arrayElimCell_460)))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|) 24))) (and (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse1 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| v_DerPreprocessor_50) .cse1 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| v_DerPreprocessor_50) .cse1) (select |c_#memory_$Pointer$.offset| .cse1)) (= (select v_DerPreprocessor_50 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|) 24)))) (not (= .cse1 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|)))) (exists ((v_arrayElimCell_458 Int)) (and (= (select (select |c_#memory_$Pointer$.base| v_arrayElimCell_458) 24) v_arrayElimCell_458) (<= 2 v_arrayElimCell_458)))) (or (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_77 Int)) (let ((.cse4 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_77))) (let ((.cse2 (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_77)) (.cse3 (select .cse4 24))) (and (= (select .cse2 16) 0) (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_77) (= (select .cse2 8) 0) (not (= (select .cse2 0) 0)) (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select .cse2 24) (select v_DerPreprocessor_50 24)) (= (select |c_#memory_$Pointer$.offset| .cse3) (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse3 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_77 v_DerPreprocessor_50) .cse3 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_77 v_DerPreprocessor_50) .cse3)))) (= (select .cse4 16) 0) (= (select .cse4 8) 0) (not (= .cse3 0)))))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_77 Int)) (let ((.cse7 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_77))) (let ((.cse5 (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_77)) (.cse6 (select .cse7 24))) (and (= (select .cse5 16) 0) (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_77) (= (select .cse5 8) 0) (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select .cse5 24) (select v_DerPreprocessor_50 24)) (= (select |c_#memory_$Pointer$.offset| .cse6) (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse6 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_77 v_DerPreprocessor_50) .cse6 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_77 v_DerPreprocessor_50) .cse6)))) (= (select .cse7 16) 0) (= (select .cse7 8) 0) (not (= .cse6 0)) (not (= (select .cse7 0) 0)))))) (exists ((v_arrayElimCell_462 Int)) (let ((.cse9 (select |c_#memory_$Pointer$.offset| v_arrayElimCell_462)) (.cse8 (select |c_#memory_$Pointer$.base| v_arrayElimCell_462))) (and (not (= (select .cse8 0) 0)) (= (select .cse9 16) 0) (= (select .cse9 8) 0) (= (select .cse8 8) 0) (= v_arrayElimCell_462 (select .cse8 24)) (<= 2 v_arrayElimCell_462) (= (select .cse8 16) 0)))) (exists ((v_arrayElimCell_461 Int)) (let ((.cse11 (select |c_#memory_$Pointer$.base| v_arrayElimCell_461)) (.cse10 (select |c_#memory_$Pointer$.offset| v_arrayElimCell_461))) (and (not (= (select .cse10 0) 0)) (= (select .cse11 24) v_arrayElimCell_461) (= (select .cse10 8) 0) (= (select .cse11 8) 0) (<= 2 v_arrayElimCell_461) (= 0 (select .cse11 16)) (= (select .cse10 16) 0))))) (or (exists ((v_arrayElimCell_459 Int)) (and (<= 2 v_arrayElimCell_459) (= (select (select |c_#memory_$Pointer$.base| v_arrayElimCell_459) 24) v_arrayElimCell_459))) (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114| Int)) (let ((.cse12 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114|) 24))) (and (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select v_DerPreprocessor_50 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114|) 24)) (= (select |c_#memory_$Pointer$.offset| .cse12) (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse12 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114| v_DerPreprocessor_50) .cse12 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114| v_DerPreprocessor_50) .cse12)))) (not (= .cse12 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114|)))))) is different from true [2022-11-20 19:52:23,663 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 47 [2022-11-20 19:52:23,720 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 47 [2022-11-20 19:52:30,840 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 74 treesize of output 56 [2022-11-20 19:52:30,985 WARN L859 $PredicateComparison]: unable to prove that (and (or (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_76 Int)) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_76) 24))) (and (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_76) (not (= .cse0 0)) (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_76) 24) (select v_DerPreprocessor_50 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_76 v_DerPreprocessor_50) .cse0 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_76 v_DerPreprocessor_50) .cse0) (select |c_#memory_$Pointer$.offset| .cse0))))))) (exists ((v_arrayElimCell_460 Int)) (and (<= 2 v_arrayElimCell_460) (= (select (select |c_#memory_$Pointer$.base| v_arrayElimCell_460) 24) v_arrayElimCell_460)))) (or (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|) 24))) (and (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse1 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| v_DerPreprocessor_50) .cse1 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113| v_DerPreprocessor_50) .cse1) (select |c_#memory_$Pointer$.offset| .cse1)) (= (select v_DerPreprocessor_50 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|) 24)))) (not (= .cse1 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_113|)))) (exists ((v_arrayElimCell_458 Int)) (and (= (select (select |c_#memory_$Pointer$.base| v_arrayElimCell_458) 24) v_arrayElimCell_458) (<= 2 v_arrayElimCell_458)))) (or (exists ((v_arrayElimCell_464 Int)) (let ((.cse3 (select |c_#memory_$Pointer$.offset| v_arrayElimCell_464)) (.cse2 (select |c_#memory_$Pointer$.base| v_arrayElimCell_464))) (and (= (select .cse2 24) v_arrayElimCell_464) (= (select .cse2 16) 0) (<= 2 v_arrayElimCell_464) (= (select .cse3 8) 0) (= (select .cse3 16) 0) (= (select .cse2 8) 0) (not (= (select .cse2 0) 0))))) (exists ((v_arrayElimCell_463 Int)) (let ((.cse4 (select |c_#memory_$Pointer$.offset| v_arrayElimCell_463)) (.cse5 (select |c_#memory_$Pointer$.base| v_arrayElimCell_463))) (and (= (select .cse4 8) 0) (= (select .cse5 16) 0) (= (select .cse5 24) v_arrayElimCell_463) (= (select .cse4 16) 0) (not (= (select .cse4 0) 0)) (= (select .cse5 8) 0) (<= 2 v_arrayElimCell_463)))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_78 Int)) (let ((.cse8 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_78))) (let ((.cse7 (select .cse8 24)) (.cse6 (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_78))) (and (= (select .cse6 8) 0) (= (select .cse6 16) 0) (not (= (select .cse6 0) 0)) (not (= .cse7 0)) (= (select .cse8 16) 0) (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse7 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_78 v_DerPreprocessor_50) .cse7 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_78 v_DerPreprocessor_50) .cse7) (select |c_#memory_$Pointer$.offset| .cse7)) (= (select .cse6 24) (select v_DerPreprocessor_50 24)))) (= (select .cse8 8) 0) (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_78))))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_78 Int)) (let ((.cse10 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_78))) (let ((.cse11 (select .cse10 24)) (.cse9 (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_78))) (and (= (select .cse9 8) 0) (= (select .cse9 16) 0) (not (= (select .cse10 0) 0)) (not (= .cse11 0)) (= (select .cse10 16) 0) (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse11 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_78 v_DerPreprocessor_50) .cse11 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_78 v_DerPreprocessor_50) .cse11) (select |c_#memory_$Pointer$.offset| .cse11)) (= (select .cse9 24) (select v_DerPreprocessor_50 24)))) (= (select .cse10 8) 0) (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_78)))))) (or (exists ((v_arrayElimCell_465 Int)) (let ((.cse13 (select |c_#memory_$Pointer$.base| v_arrayElimCell_465)) (.cse12 (select |c_#memory_$Pointer$.offset| v_arrayElimCell_465))) (and (= (select .cse12 16) 0) (not (= (select .cse12 0) 0)) (= v_arrayElimCell_465 (select .cse13 24)) (= (select .cse13 16) 0) (= (select .cse13 8) 0) (<= 2 v_arrayElimCell_465) (= (select .cse12 8) 0)))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_79 Int) (v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (let ((.cse14 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_79))) (let ((.cse16 (select .cse14 24)) (.cse15 (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_79))) (and (= (select .cse14 16) 0) (= (select .cse15 8) 0) (= (select v_DerPreprocessor_50 24) (select .cse15 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse16 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_79 v_DerPreprocessor_50) .cse16 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_79 v_DerPreprocessor_50) .cse16) (select |c_#memory_$Pointer$.offset| .cse16)) (= (select .cse14 8) 0) (not (= 0 .cse16)) (= (select .cse15 16) 0) (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_79) (not (= (select .cse14 0) 0)))))) (exists ((v_arrayElimCell_465 Int)) (let ((.cse18 (select |c_#memory_$Pointer$.base| v_arrayElimCell_465)) (.cse17 (select |c_#memory_$Pointer$.offset| v_arrayElimCell_465))) (and (= (select .cse17 16) 0) (not (= (select .cse18 0) 0)) (= v_arrayElimCell_465 (select .cse18 24)) (= (select .cse18 16) 0) (= (select .cse18 8) 0) (<= 2 v_arrayElimCell_465) (= (select .cse17 8) 0)))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_79 Int) (v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (let ((.cse19 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_79))) (let ((.cse21 (select .cse19 24)) (.cse20 (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_79))) (and (= (select .cse19 16) 0) (= (select .cse20 8) 0) (= (select v_DerPreprocessor_50 24) (select .cse20 24)) (= (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse21 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_79 v_DerPreprocessor_50) .cse21 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_79 v_DerPreprocessor_50) .cse21) (select |c_#memory_$Pointer$.offset| .cse21)) (= (select .cse19 8) 0) (not (= (select .cse20 0) 0)) (not (= 0 .cse21)) (= (select .cse20 16) 0) (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_79)))))) (or (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_77 Int)) (let ((.cse24 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_77))) (let ((.cse22 (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_77)) (.cse23 (select .cse24 24))) (and (= (select .cse22 16) 0) (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_77) (= (select .cse22 8) 0) (not (= (select .cse22 0) 0)) (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select .cse22 24) (select v_DerPreprocessor_50 24)) (= (select |c_#memory_$Pointer$.offset| .cse23) (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse23 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_77 v_DerPreprocessor_50) .cse23 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_77 v_DerPreprocessor_50) .cse23)))) (= (select .cse24 16) 0) (= (select .cse24 8) 0) (not (= .cse23 0)))))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_77 Int)) (let ((.cse27 (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_77))) (let ((.cse25 (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_77)) (.cse26 (select .cse27 24))) (and (= (select .cse25 16) 0) (<= 2 v_aws_linked_list_front_~list.base_BEFORE_CALL_77) (= (select .cse25 8) 0) (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select .cse25 24) (select v_DerPreprocessor_50 24)) (= (select |c_#memory_$Pointer$.offset| .cse26) (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse26 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_77 v_DerPreprocessor_50) .cse26 v_DerPreprocessor_49) v_aws_linked_list_front_~list.base_BEFORE_CALL_77 v_DerPreprocessor_50) .cse26)))) (= (select .cse27 16) 0) (= (select .cse27 8) 0) (not (= .cse26 0)) (not (= (select .cse27 0) 0)))))) (exists ((v_arrayElimCell_462 Int)) (let ((.cse29 (select |c_#memory_$Pointer$.offset| v_arrayElimCell_462)) (.cse28 (select |c_#memory_$Pointer$.base| v_arrayElimCell_462))) (and (not (= (select .cse28 0) 0)) (= (select .cse29 16) 0) (= (select .cse29 8) 0) (= (select .cse28 8) 0) (= v_arrayElimCell_462 (select .cse28 24)) (<= 2 v_arrayElimCell_462) (= (select .cse28 16) 0)))) (exists ((v_arrayElimCell_461 Int)) (let ((.cse31 (select |c_#memory_$Pointer$.base| v_arrayElimCell_461)) (.cse30 (select |c_#memory_$Pointer$.offset| v_arrayElimCell_461))) (and (not (= (select .cse30 0) 0)) (= (select .cse31 24) v_arrayElimCell_461) (= (select .cse30 8) 0) (= (select .cse31 8) 0) (<= 2 v_arrayElimCell_461) (= 0 (select .cse31 16)) (= (select .cse30 16) 0))))) (or (exists ((v_arrayElimCell_459 Int)) (and (<= 2 v_arrayElimCell_459) (= (select (select |c_#memory_$Pointer$.base| v_arrayElimCell_459) 24) v_arrayElimCell_459))) (exists ((|v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114| Int)) (let ((.cse32 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114|) 24))) (and (exists ((v_DerPreprocessor_50 (Array Int Int)) (v_DerPreprocessor_49 (Array Int Int))) (and (= (select v_DerPreprocessor_50 24) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114|) 24)) (= (select |c_#memory_$Pointer$.offset| .cse32) (select (store (store (store (store |c_#memory_$Pointer$.offset| .cse32 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114| v_DerPreprocessor_50) .cse32 v_DerPreprocessor_49) |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114| v_DerPreprocessor_50) .cse32)))) (not (= .cse32 0)) (<= 2 |v_ULTIMATE.start_aws_linked_list_front_harness_~#list~0#1.base_BEFORE_CALL_114|)))))) is different from true [2022-11-20 19:52:37,327 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 74 treesize of output 56 [2022-11-20 19:52:48,211 WARN L233 SmtUtils]: Spent 9.74s on a formula simplification that was a NOOP. DAG size: 363 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:53:15,152 WARN L233 SmtUtils]: Spent 24.78s on a formula simplification that was a NOOP. DAG size: 420 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:53:27,998 WARN L233 SmtUtils]: Spent 11.56s on a formula simplification that was a NOOP. DAG size: 396 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:53:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 24 not checked. [2022-11-20 19:53:28,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:53:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 19:53:34,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874710882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:53:34,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23651829] [2022-11-20 19:53:34,217 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-20 19:53:34,217 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:53:34,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:53:34,218 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:53:34,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:53:34,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,309 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:53:34,309 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 [2022-11-20 19:53:34,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,326 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 [2022-11-20 19:53:34,530 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 [2022-11-20 19:53:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,551 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 [2022-11-20 19:53:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,579 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 [2022-11-20 19:53:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,612 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 [2022-11-20 19:53:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,674 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 [2022-11-20 19:53:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:53:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:53:34,728 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:53:34,728 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 [2022-11-20 19:53:34,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,762 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 [2022-11-20 19:53:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,847 INFO L321 Elim1Store]: treesize reduction 40, result has 48.1 percent of original size [2022-11-20 19:53:34,848 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 [2022-11-20 19:53:34,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,951 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:53:34,952 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 [2022-11-20 19:53:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:34,988 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 [2022-11-20 19:53:35,051 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 [2022-11-20 19:53:35,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,077 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 [2022-11-20 19:53:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,102 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 [2022-11-20 19:53:35,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,126 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 [2022-11-20 19:53:35,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:53:35,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,140 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 [2022-11-20 19:53:35,153 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 [2022-11-20 19:53:35,188 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 [2022-11-20 19:53:35,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:53:35,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,211 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 [2022-11-20 19:53:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,231 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 [2022-11-20 19:53:35,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,250 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 [2022-11-20 19:53:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,269 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 [2022-11-20 19:53:35,282 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 [2022-11-20 19:53:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-20 19:53:35,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,328 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 33 treesize of output 19 [2022-11-20 19:53:35,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,350 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 [2022-11-20 19:53:35,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:53:35,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2022-11-20 19:53:35,905 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-20 19:53:36,609 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 107 for LOIs [2022-11-20 19:53:36,889 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 74 for LOIs [2022-11-20 19:53:36,929 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 111 for LOIs [2022-11-20 19:53:38,195 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:53:38,197 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-20 19:53:38,216 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:53:38,275 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:54:07,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6965#(and (exists ((|v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45| Int)) (and (<= (ite (= (ite (and (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) 0) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) (= 16 (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) 0))) 1 0) 0) 0 1) 1) (not (= 0 (mod (ite (= (ite (= (mod (ite (= (ite (and (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) 0) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) (= 16 (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256))) (<= 0 (ite (= (ite (and (= (select (select |#memory_$Pointer$.base| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) 0) |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) (= 16 (select (select |#memory_$Pointer$.offset| |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|) 0))) 1 0) 0) 0 1)) (not (= (mod (ite (= |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45| 0) 0 1) 256) 0)) (<= 0 |v_aws_linked_list_front_#in~list.base_BEFORE_CALL_45|))) (<= 0 |__VERIFIER_assert_#in~cond|) (= |~#s_can_fail_allocator_static~0.base| 4) (= (mod __VERIFIER_assert_~cond 256) 0) (= |~#s_can_fail_allocator_static~0.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85|) (= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87| (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24)))) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24))) (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (<= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24)) 0) (= (+ 16 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85|) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24))) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_87|) (+ |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 24)))) (<= |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_85| 0))) (= ~tl_last_error~0 0) (= |#NULL.offset| 0) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:54:07,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:54:07,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:54:07,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 7] total 43 [2022-11-20 19:54:07,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183720136] [2022-11-20 19:54:07,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:54:07,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 19:54:07,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:54:07,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 19:54:07,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=4816, Unknown=165, NotChecked=580, Total=5852 [2022-11-20 19:54:07,503 INFO L87 Difference]: Start difference. First operand 160 states and 197 transitions. Second operand has 43 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 20 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (33), 17 states have call predecessors, (33), 19 states have call successors, (33) [2022-11-20 19:54:43,152 WARN L233 SmtUtils]: Spent 17.02s on a formula simplification that was a NOOP. DAG size: 424 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:54:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:54:44,531 INFO L93 Difference]: Finished difference Result 287 states and 357 transitions. [2022-11-20 19:54:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 19:54:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 20 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (33), 17 states have call predecessors, (33), 19 states have call successors, (33) Word has length 65 [2022-11-20 19:54:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:54:44,543 INFO L225 Difference]: With dead ends: 287 [2022-11-20 19:54:44,543 INFO L226 Difference]: Without dead ends: 199 [2022-11-20 19:54:44,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 136 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 183.7s TimeCoverageRelationStatistics Valid=440, Invalid=8123, Unknown=195, NotChecked=748, Total=9506 [2022-11-20 19:54:44,547 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 43 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 834 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:54:44,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1445 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 308 Invalid, 0 Unknown, 834 Unchecked, 0.4s Time] [2022-11-20 19:54:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-20 19:54:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 172. [2022-11-20 19:54:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 103 states have internal predecessors, (115), 44 states have call successors, (44), 26 states have call predecessors, (44), 28 states have return successors, (48), 42 states have call predecessors, (48), 43 states have call successors, (48) [2022-11-20 19:54:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 207 transitions. [2022-11-20 19:54:44,628 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 207 transitions. Word has length 65 [2022-11-20 19:54:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:54:44,628 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 207 transitions. [2022-11-20 19:54:44,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 20 states have call successors, (37), 12 states have call predecessors, (37), 12 states have return successors, (33), 17 states have call predecessors, (33), 19 states have call successors, (33) [2022-11-20 19:54:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 207 transitions. [2022-11-20 19:54:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-20 19:54:44,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:54:44,630 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 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] [2022-11-20 19:54:44,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:54:44,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 19:54:44,832 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:54:44,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:54:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1150032613, now seen corresponding path program 1 times [2022-11-20 19:54:44,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:54:44,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558567168] [2022-11-20 19:54:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:54:44,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:54:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:54:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-20 19:54:45,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:54:45,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558567168] [2022-11-20 19:54:45,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558567168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:54:45,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609834063] [2022-11-20 19:54:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:54:45,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:54:45,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:54:45,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:54:45,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 19:54:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:54:45,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 19:54:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:54:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 19:54:45,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:54:45,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609834063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:54:45,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 19:54:45,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 11 [2022-11-20 19:54:45,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688979904] [2022-11-20 19:54:45,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:54:45,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 19:54:45,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:54:45,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 19:54:45,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-20 19:54:45,578 INFO L87 Difference]: Start difference. First operand 172 states and 207 transitions. Second operand has 9 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-20 19:54:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:54:45,935 INFO L93 Difference]: Finished difference Result 292 states and 362 transitions. [2022-11-20 19:54:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 19:54:45,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 75 [2022-11-20 19:54:45,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:54:45,938 INFO L225 Difference]: With dead ends: 292 [2022-11-20 19:54:45,938 INFO L226 Difference]: Without dead ends: 180 [2022-11-20 19:54:45,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:54:45,939 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 17 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:54:45,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 387 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:54:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-20 19:54:46,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2022-11-20 19:54:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 99 states have (on average 1.1515151515151516) internal successors, (114), 103 states have internal predecessors, (114), 44 states have call successors, (44), 26 states have call predecessors, (44), 28 states have return successors, (48), 42 states have call predecessors, (48), 43 states have call successors, (48) [2022-11-20 19:54:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 206 transitions. [2022-11-20 19:54:46,025 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 206 transitions. Word has length 75 [2022-11-20 19:54:46,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:54:46,025 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 206 transitions. [2022-11-20 19:54:46,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-20 19:54:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 206 transitions. [2022-11-20 19:54:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 19:54:46,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:54:46,027 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] [2022-11-20 19:54:46,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 19:54:46,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 19:54:46,233 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:54:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:54:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1576417214, now seen corresponding path program 1 times [2022-11-20 19:54:46,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:54:46,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000708840] [2022-11-20 19:54:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:54:46,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:54:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:54:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 19:54:51,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:54:51,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000708840] [2022-11-20 19:54:51,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000708840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:54:51,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454080422] [2022-11-20 19:54:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:54:51,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:54:51,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:54:51,175 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:54:51,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 19:54:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:54:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-20 19:54:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:54:51,555 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 [2022-11-20 19:54:52,064 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 19:54:52,064 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 [2022-11-20 19:54:52,079 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 [2022-11-20 19:54:52,085 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 [2022-11-20 19:54:52,093 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-20 19:54:52,113 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 [2022-11-20 19:54:52,225 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-20 19:54:52,225 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 [2022-11-20 19:54:52,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:54:52,234 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 [2022-11-20 19:54:52,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:54:52,243 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 [2022-11-20 19:54:52,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:54:52,249 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 [2022-11-20 19:54:52,260 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 [2022-11-20 19:56:21,585 WARN L233 SmtUtils]: Spent 19.14s on a formula simplification that was a NOOP. DAG size: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:57:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 31 refuted. 20 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:57:54,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 19:59:09,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454080422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:09,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [482517187] [2022-11-20 19:59:09,566 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2022-11-20 19:59:09,566 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:59:09,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:59:09,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:59:09,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:59:09,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,044 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-20 19:59:10,044 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 [2022-11-20 19:59:10,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,085 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 [2022-11-20 19:59:10,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,404 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 [2022-11-20 19:59:10,455 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 [2022-11-20 19:59:10,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,531 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 [2022-11-20 19:59:10,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,592 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 [2022-11-20 19:59:10,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,668 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 [2022-11-20 19:59:10,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:10,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:10,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:10,930 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 19:59:10,930 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 [2022-11-20 19:59:10,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,040 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 [2022-11-20 19:59:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,685 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:59:11,686 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 [2022-11-20 19:59:11,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,743 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 [2022-11-20 19:59:11,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:11,864 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 [2022-11-20 19:59:11,953 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 [2022-11-20 19:59:12,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:12,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,016 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 [2022-11-20 19:59:12,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,091 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 [2022-11-20 19:59:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,159 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 [2022-11-20 19:59:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,208 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 [2022-11-20 19:59:12,238 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 [2022-11-20 19:59:12,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:12,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,334 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 [2022-11-20 19:59:12,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,389 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 [2022-11-20 19:59:12,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,451 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 [2022-11-20 19:59:12,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,513 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 [2022-11-20 19:59:12,540 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 [2022-11-20 19:59:12,574 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 [2022-11-20 19:59:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,637 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 [2022-11-20 19:59:12,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,698 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 [2022-11-20 19:59:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,761 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 [2022-11-20 19:59:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:12,868 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 [2022-11-20 19:59:13,541 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_front with input of size 73 for LOIs [2022-11-20 19:59:14,940 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_empty with input of size 109 for LOIs [2022-11-20 19:59:15,255 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 89 for LOIs [2022-11-20 19:59:15,371 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_is_valid with input of size 111 for LOIs [2022-11-20 19:59:16,784 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 15 for LOIs [2022-11-20 19:59:16,791 INFO L197 IcfgInterpreter]: Interpreting procedure nondet_uint64_t with input of size 103 for LOIs [2022-11-20 19:59:16,815 INFO L197 IcfgInterpreter]: Interpreting procedure aws_linked_list_node_next_is_valid with input of size 20 for LOIs [2022-11-20 19:59:16,884 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:59:26,981 WARN L233 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 93 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:01:12,820 WARN L233 SmtUtils]: Spent 13.11s on a formula simplification. DAG size of input: 89 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:01:27,542 WARN L233 SmtUtils]: Spent 13.10s on a formula simplification. DAG size of input: 91 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:01:27,544 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9198#(and (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_124 Int)) (and (not (= (mod (ite (= (ite (= (mod (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_124) 0)) (= v_aws_linked_list_front_~list.base_BEFORE_CALL_124 (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_124) 0))) 1 0) 0) 0 1) 256) 0) 1 0) 0) 0 1) 256) 0)) (<= 0 v_aws_linked_list_front_~list.base_BEFORE_CALL_124) (<= (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_124) 0)) (= v_aws_linked_list_front_~list.base_BEFORE_CALL_124 (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_124) 0))) 1 0) 0) 0 1) 1) (not (= (mod (ite (= v_aws_linked_list_front_~list.base_BEFORE_CALL_124 0) 0 1) 256) 0)) (<= 0 (ite (= (ite (and (= 16 (select (select |#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_124) 0)) (= v_aws_linked_list_front_~list.base_BEFORE_CALL_124 (select (select |#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_124) 0))) 1 0) 0) 0 1)))) (exists ((|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.offset_BEFORE_CALL_100| Int) (|v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102| Int)) (and (<= 0 |v_ULTIMATE.start_ensure_linked_list_is_allocated_~list#1.base_BEFORE_CALL_102|) (<= 0 (select (select |#memory_$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) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| 0) (<= ~tl_last_error~0 0) (<= 0 ~tl_last_error~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:01:27,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:27,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:01:27,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 39, 21] total 76 [2022-11-20 20:01:27,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724782865] [2022-11-20 20:01:27,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:27,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-20 20:01:27,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-20 20:01:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=11066, Unknown=377, NotChecked=0, Total=11990 [2022-11-20 20:01:27,551 INFO L87 Difference]: Start difference. First operand 172 states and 206 transitions. Second operand has 76 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 61 states have internal predecessors, (117), 28 states have call successors, (43), 13 states have call predecessors, (43), 21 states have return successors, (39), 25 states have call predecessors, (39), 26 states have call successors, (39) [2022-11-20 20:01:36,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-20 20:01:36,377 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-20 20:01:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:01:36,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 130 SyntacticMatches, 15 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 316.9s TimeCoverageRelationStatistics Valid=569, Invalid=11688, Unknown=399, NotChecked=0, Total=12656 [2022-11-20 20:01:36,381 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:36,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 99 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 17 Unchecked, 0.9s Time] [2022-11-20 20:01:36,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 20:01:36,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:36,582 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:898) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:772) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:346) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 48 more [2022-11-20 20:01:36,586 INFO L158 Benchmark]: Toolchain (without parser) took 769817.16ms. Allocated memory was 174.1MB in the beginning and 771.8MB in the end (delta: 597.7MB). Free memory was 124.0MB in the beginning and 675.5MB in the end (delta: -551.5MB). Peak memory consumption was 47.2MB. Max. memory is 16.1GB. [2022-11-20 20:01:36,586 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 117.4MB. Free memory was 83.8MB in the beginning and 83.8MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 20:01:36,586 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2614.40ms. Allocated memory is still 174.1MB. Free memory was 124.0MB in the beginning and 101.6MB in the end (delta: 22.4MB). Peak memory consumption was 69.6MB. Max. memory is 16.1GB. [2022-11-20 20:01:36,586 INFO L158 Benchmark]: Boogie Procedure Inliner took 134.02ms. Allocated memory is still 174.1MB. Free memory was 101.6MB in the beginning and 96.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-20 20:01:36,586 INFO L158 Benchmark]: Boogie Preprocessor took 51.53ms. Allocated memory is still 174.1MB. Free memory was 96.4MB in the beginning and 93.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 20:01:36,587 INFO L158 Benchmark]: RCFGBuilder took 1104.54ms. Allocated memory is still 174.1MB. Free memory was 93.3MB in the beginning and 99.5MB in the end (delta: -6.2MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. [2022-11-20 20:01:36,587 INFO L158 Benchmark]: TraceAbstraction took 765903.52ms. Allocated memory was 174.1MB in the beginning and 771.8MB in the end (delta: 597.7MB). Free memory was 98.5MB in the beginning and 675.5MB in the end (delta: -577.0MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2022-11-20 20:01:36,587 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 117.4MB. Free memory was 83.8MB in the beginning and 83.8MB in the end (delta: 27.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2614.40ms. Allocated memory is still 174.1MB. Free memory was 124.0MB in the beginning and 101.6MB in the end (delta: 22.4MB). Peak memory consumption was 69.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 134.02ms. Allocated memory is still 174.1MB. Free memory was 101.6MB in the beginning and 96.4MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.53ms. Allocated memory is still 174.1MB. Free memory was 96.4MB in the beginning and 93.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1104.54ms. Allocated memory is still 174.1MB. Free memory was 93.3MB in the beginning and 99.5MB in the end (delta: -6.2MB). Peak memory consumption was 22.0MB. Max. memory is 16.1GB. * TraceAbstraction took 765903.52ms. Allocated memory was 174.1MB in the beginning and 771.8MB in the end (delta: 597.7MB). Free memory was 98.5MB in the beginning and 675.5MB in the end (delta: -577.0MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/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_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 20:01:38,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:01:38,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:01:38,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:01:38,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:01:38,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:01:38,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:01:38,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:01:38,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:01:38,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:01:38,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:01:38,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:01:38,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:01:38,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:01:38,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:01:38,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:01:38,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:01:38,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:01:38,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:01:38,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:01:38,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:01:38,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:01:38,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:01:38,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:01:38,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:01:38,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:01:38,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:01:38,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:01:38,893 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:01:38,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:01:38,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:01:38,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:01:38,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:01:38,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:01:38,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:01:38,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:01:38,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:01:38,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:01:38,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:01:38,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:01:38,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:01:38,932 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-20 20:01:38,970 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:01:38,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:01:38,973 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:01:38,973 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:01:38,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:01:38,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:01:38,974 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:01:38,974 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:01:38,975 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:01:38,975 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:01:38,976 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:01:38,976 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:01:38,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:01:38,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:01:38,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:01:38,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:01:38,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:01:38,978 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:01:38,978 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 20:01:38,978 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 20:01:38,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:01:38,979 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:01:38,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:01:38,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:01:38,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 20:01:38,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:01:38,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:01:38,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:01:38,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:01:38,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:01:38,981 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 20:01:38,981 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:38,981 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:01:38,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:01:38,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 20:01:38,982 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61592663790a1842b8bd7e9befeca1c276604b90aee8701db027349608c78395 [2022-11-20 20:01:39,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:01:39,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:01:39,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:01:39,391 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:01:39,395 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:01:39,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-20 20:01:42,404 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:01:42,918 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:01:42,918 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i [2022-11-20 20:01:42,944 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/data/0e31b5e54/8d9628b64b3c49e5aa06eb046b5e664b/FLAG58884bb93 [2022-11-20 20:01:42,960 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/data/0e31b5e54/8d9628b64b3c49e5aa06eb046b5e664b [2022-11-20 20:01:42,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:01:42,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:01:42,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:01:42,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:01:42,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:01:42,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:01:42" (1/1) ... [2022-11-20 20:01:42,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52b4c780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:42, skipping insertion in model container [2022-11-20 20:01:42,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:01:42" (1/1) ... [2022-11-20 20:01:42,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:01:43,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:01:43,425 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-20 20:01:43,431 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-20 20:01:44,220 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,221 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,221 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,222 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,223 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,237 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,238 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,240 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,241 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,243 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,244 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,245 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,246 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,588 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 20:01:44,589 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 20:01:44,590 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 20:01:44,592 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 20:01:44,593 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 20:01:44,594 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 20:01:44,595 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 20:01:44,595 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 20:01:44,596 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 20:01:44,596 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 20:01:44,785 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 20:01:44,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:01:44,835 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 20:01:44,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:01:44,897 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-20 20:01:44,898 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-20 20:01:44,942 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,942 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,943 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,943 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,944 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,963 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,964 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,965 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,966 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,968 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,968 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,969 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:44,970 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,057 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 20:01:45,058 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 20:01:45,059 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 20:01:45,059 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 20:01:45,066 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 20:01:45,067 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 20:01:45,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 20:01:45,068 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 20:01:45,069 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 20:01:45,069 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 20:01:45,103 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 20:01:45,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:01:45,147 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:01:45,172 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4495,4508] [2022-11-20 20:01:45,173 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_d2edc884-d43a-4367-8e7f-c1a8d1963896/sv-benchmarks/c/aws-c-common/aws_linked_list_front_harness.i[4555,4568] [2022-11-20 20:01:45,224 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,225 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,225 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,225 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,226 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,237 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,238 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,239 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,241 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,242 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,244 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,244 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,245 WARN L1569 CHandler]: Possible shadowing of function index [2022-11-20 20:01:45,289 WARN L611 FunctionHandler]: implicit declaration of function __atomic_load_n [2022-11-20 20:01:45,290 WARN L611 FunctionHandler]: implicit declaration of function __atomic_store_n [2022-11-20 20:01:45,291 WARN L611 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2022-11-20 20:01:45,292 WARN L611 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2022-11-20 20:01:45,293 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2022-11-20 20:01:45,294 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2022-11-20 20:01:45,294 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2022-11-20 20:01:45,294 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2022-11-20 20:01:45,295 WARN L611 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2022-11-20 20:01:45,295 WARN L611 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2022-11-20 20:01:45,320 WARN L611 FunctionHandler]: implicit declaration of function __builtin_va_copy [2022-11-20 20:01:45,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:01:45,555 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:01:45,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45 WrapperNode [2022-11-20 20:01:45,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:01:45,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:01:45,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:01:45,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:01:45,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,665 INFO L138 Inliner]: procedures = 698, calls = 1044, calls flagged for inlining = 50, calls inlined = 5, statements flattened = 134 [2022-11-20 20:01:45,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:01:45,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:01:45,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:01:45,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:01:45,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,756 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:01:45,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:01:45,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:01:45,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:01:45,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (1/1) ... [2022-11-20 20:01:45,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:01:45,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:45,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:01:45,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:01:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:01:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 20:01:45,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 20:01:45,875 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 20:01:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2022-11-20 20:01:45,875 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2022-11-20 20:01:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 20:01:45,875 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2022-11-20 20:01:45,876 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2022-11-20 20:01:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:01:45,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 20:01:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_front [2022-11-20 20:01:45,877 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_front [2022-11-20 20:01:45,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:01:45,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:01:45,878 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2022-11-20 20:01:45,879 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2022-11-20 20:01:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 20:01:45,879 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 20:01:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:01:45,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 20:01:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 20:01:45,880 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2022-11-20 20:01:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2022-11-20 20:01:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2022-11-20 20:01:45,881 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2022-11-20 20:01:46,232 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:01:46,234 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:01:46,658 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:01:46,665 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:01:46,666 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:01:46,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:01:46 BoogieIcfgContainer [2022-11-20 20:01:46,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:01:46,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:01:46,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:01:46,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:01:46,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:01:42" (1/3) ... [2022-11-20 20:01:46,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca85d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:01:46, skipping insertion in model container [2022-11-20 20:01:46,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:01:45" (2/3) ... [2022-11-20 20:01:46,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ca85d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:01:46, skipping insertion in model container [2022-11-20 20:01:46,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:01:46" (3/3) ... [2022-11-20 20:01:46,693 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_linked_list_front_harness.i [2022-11-20 20:01:46,713 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:01:46,713 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:01:46,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:01:46,790 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;@45e644e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:01:46,790 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:01:46,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 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) [2022-11-20 20:01:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 20:01:46,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:46,810 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 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] [2022-11-20 20:01:46,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:46,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1286081961, now seen corresponding path program 1 times [2022-11-20 20:01:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:46,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155664952] [2022-11-20 20:01:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:46,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:46,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:46,839 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:01:46,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 20:01:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:47,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 20:01:47,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 20:01:47,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:47,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155664952] [2022-11-20 20:01:47,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155664952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:47,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:47,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:01:47,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147046050] [2022-11-20 20:01:47,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:47,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:01:47,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:47,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:01:47,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:01:47,286 INFO L87 Difference]: Start difference. First operand has 98 states, 64 states have (on average 1.296875) internal successors, (83), 65 states have internal predecessors, (83), 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 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2022-11-20 20:01:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:47,356 INFO L93 Difference]: Finished difference Result 188 states and 271 transitions. [2022-11-20 20:01:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:01:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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 84 [2022-11-20 20:01:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:47,370 INFO L225 Difference]: With dead ends: 188 [2022-11-20 20:01:47,370 INFO L226 Difference]: Without dead ends: 93 [2022-11-20 20:01:47,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:01:47,385 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:47,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:01:47,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-20 20:01:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-20 20:01:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-20 20:01:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-11-20 20:01:47,453 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 84 [2022-11-20 20:01:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:47,454 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-11-20 20:01:47,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2022-11-20 20:01:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-11-20 20:01:47,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-20 20:01:47,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:47,461 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 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] [2022-11-20 20:01:47,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:47,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:47,678 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:47,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1287183985, now seen corresponding path program 1 times [2022-11-20 20:01:47,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:47,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302650195] [2022-11-20 20:01:47,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:47,680 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:47,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:47,681 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:01:47,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 20:01:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:47,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:01:47,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:01:48,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:48,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:48,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302650195] [2022-11-20 20:01:48,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302650195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:48,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:48,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:01:48,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161131338] [2022-11-20 20:01:48,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:48,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:01:48,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:01:48,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:01:48,048 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-20 20:01:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:48,192 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2022-11-20 20:01:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:01:48,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 84 [2022-11-20 20:01:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:48,196 INFO L225 Difference]: With dead ends: 169 [2022-11-20 20:01:48,196 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 20:01:48,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:01:48,198 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 2 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:48,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 558 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:01:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 20:01:48,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-20 20:01:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 63 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-11-20 20:01:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 125 transitions. [2022-11-20 20:01:48,211 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 125 transitions. Word has length 84 [2022-11-20 20:01:48,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:48,211 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 125 transitions. [2022-11-20 20:01:48,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-20 20:01:48,212 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 125 transitions. [2022-11-20 20:01:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-20 20:01:48,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:48,213 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 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, 1, 1, 1, 1] [2022-11-20 20:01:48,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:48,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:48,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:48,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:48,430 INFO L85 PathProgramCache]: Analyzing trace with hash 415994251, now seen corresponding path program 1 times [2022-11-20 20:01:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:48,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062077126] [2022-11-20 20:01:48,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:48,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:48,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:48,434 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:01:48,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 20:01:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:48,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:01:48,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:01:48,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:48,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:48,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062077126] [2022-11-20 20:01:48,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062077126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:48,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:48,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:01:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654051596] [2022-11-20 20:01:48,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:48,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:01:48,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:01:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:01:48,885 INFO L87 Difference]: Start difference. First operand 95 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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) [2022-11-20 20:01:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:49,262 INFO L93 Difference]: Finished difference Result 174 states and 231 transitions. [2022-11-20 20:01:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:01:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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 86 [2022-11-20 20:01:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:49,264 INFO L225 Difference]: With dead ends: 174 [2022-11-20 20:01:49,264 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 20:01:49,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:01:49,265 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 50 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:49,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 637 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:01:49,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 20:01:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-20 20:01:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 63 states have internal predecessors, (75), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-11-20 20:01:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2022-11-20 20:01:49,278 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 86 [2022-11-20 20:01:49,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:49,278 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2022-11-20 20:01:49,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 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) [2022-11-20 20:01:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2022-11-20 20:01:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 20:01:49,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:49,280 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 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, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:49,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:49,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:49,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash 426166840, now seen corresponding path program 1 times [2022-11-20 20:01:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:49,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035930424] [2022-11-20 20:01:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:49,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:49,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:49,507 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:01:49,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 20:01:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:49,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:01:49,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:01:49,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:49,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:49,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035930424] [2022-11-20 20:01:49,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035930424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:49,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:49,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 20:01:49,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632581175] [2022-11-20 20:01:49,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:49,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:01:49,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:49,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:01:49,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:01:49,963 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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) [2022-11-20 20:01:50,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:50,412 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2022-11-20 20:01:50,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:01:50,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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 88 [2022-11-20 20:01:50,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:50,416 INFO L225 Difference]: With dead ends: 183 [2022-11-20 20:01:50,417 INFO L226 Difference]: Without dead ends: 103 [2022-11-20 20:01:50,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:01:50,418 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 78 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:50,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 716 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:01:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-20 20:01:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2022-11-20 20:01:50,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 64 states have internal predecessors, (76), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-11-20 20:01:50,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2022-11-20 20:01:50,439 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 88 [2022-11-20 20:01:50,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:50,440 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2022-11-20 20:01:50,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 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) [2022-11-20 20:01:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2022-11-20 20:01:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-20 20:01:50,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:50,448 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:50,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:50,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:50,664 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:50,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:50,665 INFO L85 PathProgramCache]: Analyzing trace with hash 134211126, now seen corresponding path program 1 times [2022-11-20 20:01:50,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:50,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93620664] [2022-11-20 20:01:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:50,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:50,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:50,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:01:50,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-20 20:01:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:50,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:01:50,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 20:01:51,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:51,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93620664] [2022-11-20 20:01:51,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93620664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:51,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:51,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:01:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931309041] [2022-11-20 20:01:51,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:51,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:01:51,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:01:51,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:01:51,082 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-20 20:01:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:51,420 INFO L93 Difference]: Finished difference Result 179 states and 240 transitions. [2022-11-20 20:01:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:01:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 89 [2022-11-20 20:01:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:51,423 INFO L225 Difference]: With dead ends: 179 [2022-11-20 20:01:51,423 INFO L226 Difference]: Without dead ends: 102 [2022-11-20 20:01:51,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:01:51,425 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 56 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:51,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 624 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:01:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-20 20:01:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2022-11-20 20:01:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-11-20 20:01:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 126 transitions. [2022-11-20 20:01:51,441 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 126 transitions. Word has length 89 [2022-11-20 20:01:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:51,441 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 126 transitions. [2022-11-20 20:01:51,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-20 20:01:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 126 transitions. [2022-11-20 20:01:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-20 20:01:51,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:51,443 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:51,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:51,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:51,665 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:51,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2072143320, now seen corresponding path program 1 times [2022-11-20 20:01:51,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:51,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398736302] [2022-11-20 20:01:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:51,666 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:51,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:51,667 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:01:51,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 20:01:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:01:51,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 20:01:51,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:51,969 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:51,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398736302] [2022-11-20 20:01:51,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398736302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:51,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:51,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:01:51,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58989416] [2022-11-20 20:01:51,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:51,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:01:51,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:51,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:01:51,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:01:51,972 INFO L87 Difference]: Start difference. First operand 97 states and 126 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-20 20:01:52,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:52,088 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2022-11-20 20:01:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:01:52,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 97 [2022-11-20 20:01:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:52,091 INFO L225 Difference]: With dead ends: 178 [2022-11-20 20:01:52,091 INFO L226 Difference]: Without dead ends: 100 [2022-11-20 20:01:52,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:01:52,092 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 4 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:52,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 673 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:01:52,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-20 20:01:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-11-20 20:01:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.21875) internal successors, (78), 66 states have internal predecessors, (78), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-11-20 20:01:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 127 transitions. [2022-11-20 20:01:52,106 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 127 transitions. Word has length 97 [2022-11-20 20:01:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:52,107 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 127 transitions. [2022-11-20 20:01:52,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-20 20:01:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 127 transitions. [2022-11-20 20:01:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 20:01:52,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:52,109 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:52,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:52,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:52,325 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:52,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1447444667, now seen corresponding path program 1 times [2022-11-20 20:01:52,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:52,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935452748] [2022-11-20 20:01:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:52,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:52,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:52,327 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:01:52,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 20:01:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:52,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:01:52,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:55,180 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.offset| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|)))) (exists ((|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1| (_ BitVec 64)) (|v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1| (_ BitVec 64))) (not (= (_ bv0 64) (select (select |c_#memory_$Pointer$.base| |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.base_BEFORE_CALL_1|) |v_aws_linked_list_is_valid_aws_linked_list_is_valid_deep_~temp~0#1.offset_BEFORE_CALL_1|))))) is different from true [2022-11-20 20:01:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 20:01:55,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 20:01:55,980 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 20:01:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935452748] [2022-11-20 20:01:55,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935452748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:55,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1919209587] [2022-11-20 20:01:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:55,981 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:55,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 20:01:55,987 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 20:01:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 20:01:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:56,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:01:56,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:01:56,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:01:56,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1919209587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:56,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:01:56,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8] total 22 [2022-11-20 20:01:56,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827623713] [2022-11-20 20:01:56,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:56,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:01:56,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 20:01:56,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:01:56,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=369, Unknown=1, NotChecked=38, Total=462 [2022-11-20 20:01:56,497 INFO L87 Difference]: Start difference. First operand 98 states and 127 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 20:01:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:56,682 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2022-11-20 20:01:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:01:56,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 99 [2022-11-20 20:01:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:56,685 INFO L225 Difference]: With dead ends: 183 [2022-11-20 20:01:56,686 INFO L226 Difference]: Without dead ends: 104 [2022-11-20 20:01:56,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=68, Invalid=487, Unknown=1, NotChecked=44, Total=600 [2022-11-20 20:01:56,688 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 8 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:56,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 774 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:01:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-20 20:01:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-11-20 20:01:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 24 states have call successors, (24), 8 states have call predecessors, (24), 9 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-11-20 20:01:56,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2022-11-20 20:01:56,712 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 99 [2022-11-20 20:01:56,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:56,712 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2022-11-20 20:01:56,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-20 20:01:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2022-11-20 20:01:56,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 20:01:56,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:56,716 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:56,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:56,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:57,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 20:01:57,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:01:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2113170743, now seen corresponding path program 1 times [2022-11-20 20:01:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 20:01:57,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805606561] [2022-11-20 20:01:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:57,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 20:01:57,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 20:01:57,136 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 20:01:57,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2edc884-d43a-4367-8e7f-c1a8d1963896/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 20:01:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 20:01:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:00,077 WARN L859 $PredicateComparison]: unable to prove that (or (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_4 (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.base| v_aws_linked_list_front_~list.base_BEFORE_CALL_4) (_ bv0 64)) v_aws_linked_list_front_~list.base_BEFORE_CALL_4))) (exists ((v_aws_linked_list_front_~list.base_BEFORE_CALL_4 (_ BitVec 64))) (not (= (select (select |c_#memory_$Pointer$.offset| v_aws_linked_list_front_~list.base_BEFORE_CALL_4) (_ bv0 64)) (_ bv16 64))))) is different from true [2022-11-20 20:02:08,295 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:02:16,670 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:02:24,898 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:02:33,338 WARN L233 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:02:41,705 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:02:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 20:02:41,800 INFO L328 TraceCheckSpWp]: Computing backward predicates...