./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --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 4e3d62ab3962e5958dc41169c7885079de47f5dcf75079068205793f151a2e2b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:17,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:17,867 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:33:17,876 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:17,877 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:17,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:17,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:17,933 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:17,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:17,939 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:17,939 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:17,940 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:17,940 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:17,942 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:17,942 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:17,943 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:17,943 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:17,943 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:17,944 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:17,944 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:17,945 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:17,945 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:17,946 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:17,947 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:17,947 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:17,948 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:17,948 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:17,948 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:17,949 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:17,949 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:17,950 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:17,951 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:17,951 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:17,951 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:17,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:17,952 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:17,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:17,961 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:17,961 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:17,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:17,962 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:17,962 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:17,962 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:17,962 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:17,963 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e3d62ab3962e5958dc41169c7885079de47f5dcf75079068205793f151a2e2b [2023-11-23 20:33:18,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:18,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:18,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:18,370 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:18,371 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:18,373 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i [2023-11-23 20:33:21,352 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:21,949 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:21,949 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i [2023-11-23 20:33:21,995 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/data/f9177446f/f4a2df7673864c1dba6834d28030f16c/FLAGa93a37096 [2023-11-23 20:33:22,013 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/data/f9177446f/f4a2df7673864c1dba6834d28030f16c [2023-11-23 20:33:22,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:22,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:22,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:22,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:22,031 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:22,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:22" (1/1) ... [2023-11-23 20:33:22,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ce7b4a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:22, skipping insertion in model container [2023-11-23 20:33:22,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:22" (1/1) ... [2023-11-23 20:33:22,187 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:22,430 WARN L240 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_d207e47e-6187-42e8-9046-a2917f5e4ba3/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4497,4510] [2023-11-23 20:33:22,439 WARN L240 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_d207e47e-6187-42e8-9046-a2917f5e4ba3/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4557,4570] [2023-11-23 20:33:23,509 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,510 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,511 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,512 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,530 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,531 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,534 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,535 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,537 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,539 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,543 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:23,545 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,056 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:33:24,060 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:33:24,061 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:33:24,063 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:33:24,068 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:33:24,070 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:33:24,071 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:33:24,074 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:33:24,077 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:33:24,080 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:33:24,330 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,337 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:24,545 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:24,573 WARN L240 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_d207e47e-6187-42e8-9046-a2917f5e4ba3/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4497,4510] [2023-11-23 20:33:24,584 WARN L240 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_d207e47e-6187-42e8-9046-a2917f5e4ba3/sv-benchmarks/c/aws-c-common/aws_array_list_pop_back_harness.i[4557,4570] [2023-11-23 20:33:24,639 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,639 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,640 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,640 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,641 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,648 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,650 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,652 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,653 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,654 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,655 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,658 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,658 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,725 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:33:24,727 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:33:24,730 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:33:24,731 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:33:24,734 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:33:24,734 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:33:24,735 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:33:24,736 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:33:24,740 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:33:24,741 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:33:24,798 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,809 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:33:24,816 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7769-7780] [2023-11-23 20:33:24,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:25,089 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,089 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,090 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,090 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,090 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,090 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,090 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,091 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,091 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,091 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,091 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,091 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,092 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,092 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,092 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:33:25,100 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:25,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25 WrapperNode [2023-11-23 20:33:25,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:25,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:25,103 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:25,103 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:25,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,357 INFO L138 Inliner]: procedures = 690, calls = 1701, calls flagged for inlining = 52, calls inlined = 8, statements flattened = 618 [2023-11-23 20:33:25,365 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:25,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:25,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:25,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:25,376 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,390 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,444 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,468 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,477 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,483 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,494 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:25,495 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:25,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:25,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:25,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (1/1) ... [2023-11-23 20:33:25,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:25,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:25,539 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:25,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:25,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:33:25,594 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_bounded [2023-11-23 20:33:25,595 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_bounded [2023-11-23 20:33:25,595 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_is_valid [2023-11-23 20:33:25,595 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_is_valid [2023-11-23 20:33:25,596 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 20:33:25,596 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 20:33:25,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:33:25,596 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-23 20:33:25,597 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-23 20:33:25,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:33:25,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:33:25,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:33:25,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:25,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:33:25,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:25,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:25,598 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 20:33:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 20:33:25,599 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-23 20:33:25,599 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-23 20:33:25,600 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-23 20:33:25,600 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-23 20:33:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_length [2023-11-23 20:33:25,601 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_length [2023-11-23 20:33:25,601 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:33:25,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:33:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_list_pop_back [2023-11-23 20:33:25,602 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_list_pop_back [2023-11-23 20:33:25,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:33:25,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:33:25,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:33:25,603 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-23 20:33:25,604 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-23 20:33:25,604 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-23 20:33:25,604 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-23 20:33:25,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:33:25,604 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-23 20:33:25,605 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-23 20:33:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-23 20:33:25,605 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-23 20:33:25,605 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_array_list_has_allocated_data_member [2023-11-23 20:33:25,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_array_list_has_allocated_data_member [2023-11-23 20:33:25,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:25,933 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:25,936 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:26,893 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:27,077 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:27,077 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:33:27,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:27 BoogieIcfgContainer [2023-11-23 20:33:27,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:27,082 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:27,082 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:27,085 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:27,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:22" (1/3) ... [2023-11-23 20:33:27,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2176e453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:27, skipping insertion in model container [2023-11-23 20:33:27,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:25" (2/3) ... [2023-11-23 20:33:27,087 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2176e453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:27, skipping insertion in model container [2023-11-23 20:33:27,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:27" (3/3) ... [2023-11-23 20:33:27,090 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_list_pop_back_harness.i [2023-11-23 20:33:27,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:27,111 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:33:27,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:27,180 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=LoopHeads, 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;@59201b4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:27,180 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:33:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-23 20:33:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 20:33:27,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:27,199 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:27,200 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:27,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:27,206 INFO L85 PathProgramCache]: Analyzing trace with hash 879049498, now seen corresponding path program 1 times [2023-11-23 20:33:27,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:27,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599769579] [2023-11-23 20:33:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:27,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 20:33:28,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:28,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599769579] [2023-11-23 20:33:28,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599769579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:28,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262959154] [2023-11-23 20:33:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:28,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:28,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:28,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:28,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:28,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 2110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:33:28,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:29,051 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 20:33:29,052 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:29,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262959154] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:29,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:29,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 20:33:29,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995835623] [2023-11-23 20:33:29,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:29,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:33:29,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:33:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:33:29,103 INFO L87 Difference]: Start difference. First operand has 142 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 20:33:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:29,593 INFO L93 Difference]: Finished difference Result 255 states and 361 transitions. [2023-11-23 20:33:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:29,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 67 [2023-11-23 20:33:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:29,610 INFO L225 Difference]: With dead ends: 255 [2023-11-23 20:33:29,610 INFO L226 Difference]: Without dead ends: 142 [2023-11-23 20:33:29,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:33:29,627 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 29 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:29,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 546 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:33:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-23 20:33:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-23 20:33:29,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (52), 47 states have call predecessors, (52), 47 states have call successors, (52) [2023-11-23 20:33:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 189 transitions. [2023-11-23 20:33:29,711 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 189 transitions. Word has length 67 [2023-11-23 20:33:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:29,712 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 189 transitions. [2023-11-23 20:33:29,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 20:33:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 189 transitions. [2023-11-23 20:33:29,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-23 20:33:29,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:29,719 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:29,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:29,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 20:33:29,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:29,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:29,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2135035575, now seen corresponding path program 1 times [2023-11-23 20:33:29,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:29,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81471465] [2023-11-23 20:33:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:29,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:30,069 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:30,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137059732] [2023-11-23 20:33:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:30,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:30,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:30,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:30,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:33:30,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:30,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 2242 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:33:30,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 20:33:30,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:30,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:30,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81471465] [2023-11-23 20:33:30,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:30,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137059732] [2023-11-23 20:33:30,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137059732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:30,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:30,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:33:30,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104021645] [2023-11-23 20:33:30,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:30,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:33:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:33:30,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:33:30,811 INFO L87 Difference]: Start difference. First operand 142 states and 189 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 20:33:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:31,513 INFO L93 Difference]: Finished difference Result 244 states and 326 transitions. [2023-11-23 20:33:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:33:31,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 76 [2023-11-23 20:33:31,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:31,520 INFO L225 Difference]: With dead ends: 244 [2023-11-23 20:33:31,520 INFO L226 Difference]: Without dead ends: 142 [2023-11-23 20:33:31,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:33:31,535 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 47 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:31,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 777 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:33:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-23 20:33:31,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-23 20:33:31,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (49), 47 states have call predecessors, (49), 47 states have call successors, (49) [2023-11-23 20:33:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2023-11-23 20:33:31,555 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 76 [2023-11-23 20:33:31,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:31,556 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2023-11-23 20:33:31,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 4 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 20:33:31,556 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2023-11-23 20:33:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-23 20:33:31,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:31,559 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 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] [2023-11-23 20:33:31,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:31,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:31,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:31,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1339933720, now seen corresponding path program 2 times [2023-11-23 20:33:31,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:31,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847365699] [2023-11-23 20:33:31,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:31,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:31,920 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:31,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590265927] [2023-11-23 20:33:31,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:33:31,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:31,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:31,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:31,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:33:32,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 20:33:32,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:33:32,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:33:32,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-23 20:33:32,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:32,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847365699] [2023-11-23 20:33:32,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:32,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590265927] [2023-11-23 20:33:32,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590265927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:32,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:32,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:33:32,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877165220] [2023-11-23 20:33:32,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:32,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:33:32,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:33:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:32,513 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 5 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 20:33:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:32,947 INFO L93 Difference]: Finished difference Result 242 states and 320 transitions. [2023-11-23 20:33:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 85 [2023-11-23 20:33:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:32,950 INFO L225 Difference]: With dead ends: 242 [2023-11-23 20:33:32,950 INFO L226 Difference]: Without dead ends: 142 [2023-11-23 20:33:32,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:32,952 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 0 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:32,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 608 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:33:32,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-23 20:33:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-23 20:33:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 78 states have internal predecessors, (89), 48 states have call successors, (48), 16 states have call predecessors, (48), 17 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2023-11-23 20:33:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2023-11-23 20:33:32,979 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 85 [2023-11-23 20:33:32,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:32,981 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2023-11-23 20:33:32,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 20:33:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2023-11-23 20:33:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-23 20:33:32,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:32,987 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:33,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:33,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:33,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:33,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:33,201 INFO L85 PathProgramCache]: Analyzing trace with hash 33144631, now seen corresponding path program 3 times [2023-11-23 20:33:33,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:33,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580289213] [2023-11-23 20:33:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:33,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:33,306 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:33,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115770930] [2023-11-23 20:33:33,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:33:33,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:33,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:33,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:33,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:33:33,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:33:33,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:33:33,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 2506 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:33:33,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-23 20:33:34,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:34,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:34,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580289213] [2023-11-23 20:33:34,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:34,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115770930] [2023-11-23 20:33:34,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115770930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:34,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:34,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 20:33:34,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586183748] [2023-11-23 20:33:34,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:34,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:33:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:34,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:33:34,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:33:34,048 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 20:33:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:34,908 INFO L93 Difference]: Finished difference Result 241 states and 316 transitions. [2023-11-23 20:33:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:33:34,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 94 [2023-11-23 20:33:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:34,911 INFO L225 Difference]: With dead ends: 241 [2023-11-23 20:33:34,911 INFO L226 Difference]: Without dead ends: 140 [2023-11-23 20:33:34,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:33:34,913 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 51 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:34,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1033 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:33:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-23 20:33:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2023-11-23 20:33:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 75 states have (on average 1.16) internal successors, (87), 76 states have internal predecessors, (87), 48 states have call successors, (48), 16 states have call predecessors, (48), 16 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-23 20:33:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2023-11-23 20:33:34,927 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 94 [2023-11-23 20:33:34,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:34,928 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 182 transitions. [2023-11-23 20:33:34,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2023-11-23 20:33:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 182 transitions. [2023-11-23 20:33:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 20:33:34,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:34,930 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:34,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:35,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:35,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:35,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1698229982, now seen corresponding path program 1 times [2023-11-23 20:33:35,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:35,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957787817] [2023-11-23 20:33:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:35,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:35,256 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:35,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738916484] [2023-11-23 20:33:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:35,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:35,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:35,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:35,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d207e47e-6187-42e8-9046-a2917f5e4ba3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:33:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:46,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 2638 conjuncts, 368 conjunts are in the unsatisfiable core [2023-11-23 20:33:46,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:46,548 INFO L378 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 [2023-11-23 20:33:47,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:47,112 INFO L378 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 23 treesize of output 11 [2023-11-23 20:33:47,152 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2023-11-23 20:33:47,153 INFO L378 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 25 treesize of output 23 [2023-11-23 20:33:47,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:47,190 INFO L349 Elim1Store]: treesize reduction 39, result has 32.8 percent of original size [2023-11-23 20:33:47,190 INFO L378 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 2 case distinctions, treesize of input 32 treesize of output 33 [2023-11-23 20:34:04,997 INFO L349 Elim1Store]: treesize reduction 222, result has 38.2 percent of original size [2023-11-23 20:34:04,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 233 treesize of output 352 [2023-11-23 20:34:06,543 INFO L349 Elim1Store]: treesize reduction 245, result has 32.1 percent of original size [2023-11-23 20:34:06,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 158 treesize of output 280 [2023-11-23 20:34:06,743 INFO L349 Elim1Store]: treesize reduction 69, result has 25.8 percent of original size [2023-11-23 20:34:06,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 166 treesize of output 200 [2023-11-23 20:34:06,869 INFO L349 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2023-11-23 20:34:06,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 142