./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/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_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/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_18b09e49-395e-4f97-93eb-b8f63157e49c/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 c9f60659fbb0886b2c3c86084c4cc81dbedd027936fc1dda43226ecbc4710056 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:47,748 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:47,873 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:32:47,880 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:47,881 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:47,919 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:47,920 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:47,921 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:47,922 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:47,929 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:47,929 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:47,930 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:47,930 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:47,932 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:47,933 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:47,933 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:47,934 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:47,934 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:47,934 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:47,935 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:47,935 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:47,936 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:47,937 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:47,938 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:32:47,938 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:47,939 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:47,939 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:32:47,939 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:47,940 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:32:47,940 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:32:47,942 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:47,942 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:47,942 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:47,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:47,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:47,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:47,943 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:47,944 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:32:47,944 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:47,944 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:47,945 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:47,945 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:32:47,945 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:47,945 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:47,946 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_18b09e49-395e-4f97-93eb-b8f63157e49c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9f60659fbb0886b2c3c86084c4cc81dbedd027936fc1dda43226ecbc4710056 [2023-11-23 20:32:48,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:48,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:48,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:48,279 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:48,279 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:48,280 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i [2023-11-23 20:32:51,467 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:52,067 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:52,067 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i [2023-11-23 20:32:52,114 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/data/9b8e72c3d/2dda3693cbf74519b6ab61dc93ae544b/FLAG104e43683 [2023-11-23 20:32:52,131 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/data/9b8e72c3d/2dda3693cbf74519b6ab61dc93ae544b [2023-11-23 20:32:52,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:52,139 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:52,141 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:52,141 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:52,146 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:52,147 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,148 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@197fe64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:52, skipping insertion in model container [2023-11-23 20:32:52,148 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:52" (1/1) ... [2023-11-23 20:32:52,301 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:52,571 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_18b09e49-395e-4f97-93eb-b8f63157e49c/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4486,4499] [2023-11-23 20:32:52,580 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_18b09e49-395e-4f97-93eb-b8f63157e49c/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4546,4559] [2023-11-23 20:32:53,836 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:53,838 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:53,840 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:53,841 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:53,843 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:53,878 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:53,880 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:53,884 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:53,889 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,361 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:32:54,362 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:32:54,364 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:32:54,368 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:32:54,374 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:32:54,375 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:32:54,375 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:32:54,377 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:32:54,380 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:32:54,383 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:32:54,660 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,660 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:54,825 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:32:54,852 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_18b09e49-395e-4f97-93eb-b8f63157e49c/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4486,4499] [2023-11-23 20:32:54,854 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_18b09e49-395e-4f97-93eb-b8f63157e49c/sv-benchmarks/c/aws-c-common/aws_array_eq_harness.i[4546,4559] [2023-11-23 20:32:54,910 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,912 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,913 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,919 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,920 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,921 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:54,921 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:55,006 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-23 20:32:55,007 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-23 20:32:55,008 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-23 20:32:55,009 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-23 20:32:55,010 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-23 20:32:55,010 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-23 20:32:55,011 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-23 20:32:55,011 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-23 20:32:55,012 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-23 20:32:55,013 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-23 20:32:55,084 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8277] [2023-11-23 20:32:55,086 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:55,087 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-23 20:32:55,100 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8763-8774] [2023-11-23 20:32:55,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:55,456 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,457 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,457 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,458 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,458 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,458 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,458 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,459 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,459 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,460 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,460 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,460 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,460 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,463 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,463 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,463 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,463 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,463 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:55,472 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:32:55,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55 WrapperNode [2023-11-23 20:32:55,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:55,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:55,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:32:55,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:32:55,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,572 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,676 INFO L138 Inliner]: procedures = 690, calls = 2619, calls flagged for inlining = 59, calls inlined = 5, statements flattened = 792 [2023-11-23 20:32:55,676 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:55,677 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:32:55,677 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:32:55,677 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:32:55,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,711 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,724 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,782 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,785 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,813 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,821 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:32:55,823 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:32:55,823 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:32:55,824 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:32:55,824 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (1/1) ... [2023-11-23 20:32:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:55,854 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:32:55,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:32:55,938 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 20:32:55,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:32:55,938 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-23 20:32:55,938 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-23 20:32:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:32:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 20:32:55,939 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 20:32:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:32:55,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:32:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2023-11-23 20:32:55,940 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2023-11-23 20:32:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:32:55,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:32:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-23 20:32:55,940 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-23 20:32:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2023-11-23 20:32:55,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2023-11-23 20:32:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_malloc [2023-11-23 20:32:55,941 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_malloc [2023-11-23 20:32:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:32:55,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:32:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:32:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2023-11-23 20:32:55,942 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2023-11-23 20:32:55,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:32:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-23 20:32:55,943 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-23 20:32:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:32:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:32:56,269 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:32:56,272 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:32:57,577 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:32:57,768 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:32:57,768 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:32:57,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:57 BoogieIcfgContainer [2023-11-23 20:32:57,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:32:57,775 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:32:57,775 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:32:57,779 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:32:57,779 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:32:52" (1/3) ... [2023-11-23 20:32:57,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b8ae59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:57, skipping insertion in model container [2023-11-23 20:32:57,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:55" (2/3) ... [2023-11-23 20:32:57,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b8ae59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:57, skipping insertion in model container [2023-11-23 20:32:57,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:57" (3/3) ... [2023-11-23 20:32:57,785 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_array_eq_harness.i [2023-11-23 20:32:57,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:32:57,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:32:57,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:32:57,878 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;@71bed0e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:32:57,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:32:57,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-23 20:32:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 20:32:57,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:57,896 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-23 20:32:57,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:57,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:57,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1305563195, now seen corresponding path program 1 times [2023-11-23 20:32:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:57,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668055812] [2023-11-23 20:32:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:57,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 20:33:01,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668055812] [2023-11-23 20:33:01,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668055812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559128059] [2023-11-23 20:33:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:01,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:01,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:01,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:01,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:02,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 2424 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 20:33:02,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 20:33:02,246 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:02,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559128059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:02,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:02,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-11-23 20:33:02,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586603760] [2023-11-23 20:33:02,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:02,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:33:02,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:33:02,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-23 20:33:02,299 INFO L87 Difference]: Start difference. First operand has 74 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 20:33:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:02,521 INFO L93 Difference]: Finished difference Result 134 states and 194 transitions. [2023-11-23 20:33:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:02,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 50 [2023-11-23 20:33:02,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:02,534 INFO L225 Difference]: With dead ends: 134 [2023-11-23 20:33:02,535 INFO L226 Difference]: Without dead ends: 99 [2023-11-23 20:33:02,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:33:02,542 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 18 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:02,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 311 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:02,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-23 20:33:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2023-11-23 20:33:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 47 states have internal predecessors, (54), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-23 20:33:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 113 transitions. [2023-11-23 20:33:02,594 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 113 transitions. Word has length 50 [2023-11-23 20:33:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:02,595 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 113 transitions. [2023-11-23 20:33:02,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 20:33:02,596 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 113 transitions. [2023-11-23 20:33:02,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:33:02,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:02,600 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-23 20:33:02,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:02,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 20:33:02,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:02,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1424971261, now seen corresponding path program 1 times [2023-11-23 20:33:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:02,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007020042] [2023-11-23 20:33:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:02,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 20:33:03,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:03,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007020042] [2023-11-23 20:33:03,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007020042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:03,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:03,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:33:03,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232975002] [2023-11-23 20:33:03,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:03,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:33:03,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:33:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:03,529 INFO L87 Difference]: Start difference. First operand 85 states and 113 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 20:33:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:03,688 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2023-11-23 20:33:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:33:03,688 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 54 [2023-11-23 20:33:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:03,699 INFO L225 Difference]: With dead ends: 144 [2023-11-23 20:33:03,699 INFO L226 Difference]: Without dead ends: 115 [2023-11-23 20:33:03,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:03,704 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 6 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:03,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 406 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-23 20:33:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2023-11-23 20:33:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 60 states have internal predecessors, (69), 45 states have call successors, (45), 10 states have call predecessors, (45), 11 states have return successors, (47), 43 states have call predecessors, (47), 44 states have call successors, (47) [2023-11-23 20:33:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 161 transitions. [2023-11-23 20:33:03,752 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 161 transitions. Word has length 54 [2023-11-23 20:33:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:03,753 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 161 transitions. [2023-11-23 20:33:03,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 20:33:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 161 transitions. [2023-11-23 20:33:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:33:03,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:03,765 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-23 20:33:03,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:33:03,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:03,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:03,767 INFO L85 PathProgramCache]: Analyzing trace with hash 521431199, now seen corresponding path program 1 times [2023-11-23 20:33:03,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:03,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821238948] [2023-11-23 20:33:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 20:33:04,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:04,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821238948] [2023-11-23 20:33:04,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821238948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:04,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:04,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:33:04,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453028436] [2023-11-23 20:33:04,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:04,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:33:04,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:33:04,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:33:04,470 INFO L87 Difference]: Start difference. First operand 113 states and 161 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 20:33:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:04,667 INFO L93 Difference]: Finished difference Result 131 states and 179 transitions. [2023-11-23 20:33:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:33:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 55 [2023-11-23 20:33:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:04,670 INFO L225 Difference]: With dead ends: 131 [2023-11-23 20:33:04,671 INFO L226 Difference]: Without dead ends: 106 [2023-11-23 20:33:04,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:33:04,672 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 18 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:04,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 507 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:33:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-23 20:33:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2023-11-23 20:33:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 56 states have internal predecessors, (64), 39 states have call successors, (39), 10 states have call predecessors, (39), 11 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-11-23 20:33:04,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2023-11-23 20:33:04,688 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 55 [2023-11-23 20:33:04,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:04,689 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2023-11-23 20:33:04,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-23 20:33:04,689 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2023-11-23 20:33:04,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 20:33:04,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:04,691 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:04,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:33:04,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:04,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1663382302, now seen corresponding path program 1 times [2023-11-23 20:33:04,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401029078] [2023-11-23 20:33:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:04,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 20:33:07,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:07,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401029078] [2023-11-23 20:33:07,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401029078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:07,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265733919] [2023-11-23 20:33:07,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:07,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:07,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:07,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:07,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:33:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:07,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 2458 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 20:33:07,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 20:33:08,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:08,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265733919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:08,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:08,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 18 [2023-11-23 20:33:08,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102010128] [2023-11-23 20:33:08,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:08,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:33:08,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:33:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:33:08,360 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 20:33:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:08,742 INFO L93 Difference]: Finished difference Result 115 states and 156 transitions. [2023-11-23 20:33:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:33:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 62 [2023-11-23 20:33:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:08,746 INFO L225 Difference]: With dead ends: 115 [2023-11-23 20:33:08,747 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 20:33:08,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-11-23 20:33:08,750 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 20 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:08,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 490 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:33:08,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 20:33:08,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2023-11-23 20:33:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 59 states have internal predecessors, (67), 39 states have call successors, (39), 11 states have call predecessors, (39), 12 states have return successors, (41), 38 states have call predecessors, (41), 38 states have call successors, (41) [2023-11-23 20:33:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 147 transitions. [2023-11-23 20:33:08,794 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 147 transitions. Word has length 62 [2023-11-23 20:33:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:08,795 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 147 transitions. [2023-11-23 20:33:08,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-23 20:33:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 147 transitions. [2023-11-23 20:33:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-23 20:33:08,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:08,798 INFO L195 NwaCegarLoop]: trace histogram [6, 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] [2023-11-23 20:33:08,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:09,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:09,013 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:09,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:09,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1136275093, now seen corresponding path program 1 times [2023-11-23 20:33:09,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:09,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149202541] [2023-11-23 20:33:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:09,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 20:33:10,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:10,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149202541] [2023-11-23 20:33:10,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149202541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:10,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118127405] [2023-11-23 20:33:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:10,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:10,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:10,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:10,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18b09e49-395e-4f97-93eb-b8f63157e49c/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:33:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:10,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 20:33:10,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 20:33:11,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-23 20:33:12,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118127405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [238813056] [2023-11-23 20:33:12,069 INFO L159 IcfgInterpreter]: Started Sifa with 47 locations of interest [2023-11-23 20:33:12,070 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:12,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:12,080 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:12,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs