./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91 --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 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:06:31,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:06:31,561 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-25 00:06:31,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:06:31,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:06:31,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:06:31,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:06:31,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:06:31,618 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:06:31,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:06:31,624 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:06:31,625 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:06:31,625 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:06:31,627 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:06:31,627 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:06:31,628 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:06:31,629 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:06:31,629 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:06:31,630 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:06:31,630 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:06:31,631 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:06:31,631 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:06:31,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:06:31,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:06:31,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:06:31,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:06:31,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:06:31,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:06:31,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:06:31,636 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:06:31,637 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:06:31,638 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:06:31,638 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:06:31,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:06:31,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:31,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:06:31,639 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:06:31,639 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:06:31,640 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:06:31,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:06:31,640 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:06:31,641 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:06:31,641 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:06:31,641 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:06:31,642 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_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26dd1e590401fc7cb1a23c07b0d1f52f89cca75ab7679d1aa0110320620b8ebd [2023-11-25 00:06:31,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:06:31,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:06:31,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:06:31,981 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:06:31,982 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:06:31,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2023-11-25 00:06:35,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:06:35,758 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:06:35,758 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i [2023-11-25 00:06:35,805 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/data/47fd3cf85/76bc708c46724565b37d62bc473ff4ac/FLAG921794910 [2023-11-25 00:06:35,826 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/data/47fd3cf85/76bc708c46724565b37d62bc473ff4ac [2023-11-25 00:06:35,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:06:35,833 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:06:35,837 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:35,837 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:06:35,843 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:06:35,844 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:35" (1/1) ... [2023-11-25 00:06:35,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f479e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:35, skipping insertion in model container [2023-11-25 00:06:35,845 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:06:35" (1/1) ... [2023-11-25 00:06:36,004 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:06:36,310 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_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2023-11-25 00:06:36,320 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_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2023-11-25 00:06:37,466 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:37,470 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:37,471 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:37,472 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:37,474 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:37,495 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:37,496 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:37,499 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:37,500 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:37,912 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:06:37,913 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:06:37,914 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:06:37,915 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:06:37,917 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:06:37,918 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:06:37,919 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:06:37,920 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:06:37,921 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:06:37,922 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:06:38,268 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,269 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:38,419 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:06:38,444 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_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4492,4505] [2023-11-25 00:06:38,445 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_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/sv-benchmarks/c/aws-c-common/aws_byte_buf_reset_harness.i[4552,4565] [2023-11-25 00:06:38,497 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,498 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,499 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,499 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,537 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,543 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,543 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,544 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,544 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,599 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-25 00:06:38,600 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-25 00:06:38,601 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-25 00:06:38,602 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-25 00:06:38,603 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-25 00:06:38,604 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-25 00:06:38,605 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-25 00:06:38,606 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-25 00:06:38,606 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-25 00:06:38,607 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-25 00:06:38,685 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8291] [2023-11-25 00:06:38,687 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,688 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-25 00:06:38,700 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8777-8788] [2023-11-25 00:06:38,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:06:38,918 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,918 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,918 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,918 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,918 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,919 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,919 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,919 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,919 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,919 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,919 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,919 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,920 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,920 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,920 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,920 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,920 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,920 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-25 00:06:38,928 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:06:38,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38 WrapperNode [2023-11-25 00:06:38,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:06:38,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:38,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:06:38,931 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:06:38,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,059 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,172 INFO L138 Inliner]: procedures = 690, calls = 2634, calls flagged for inlining = 59, calls inlined = 7, statements flattened = 814 [2023-11-25 00:06:39,173 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:06:39,174 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:06:39,174 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:06:39,174 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:06:39,185 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,185 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,277 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,285 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,304 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:06:39,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:06:39,329 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:06:39,329 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:06:39,330 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (1/1) ... [2023-11-25 00:06:39,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:06:39,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:06:39,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:06:39,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:06:39,425 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2023-11-25 00:06:39,425 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2023-11-25 00:06:39,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-25 00:06:39,425 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-25 00:06:39,425 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-25 00:06:39,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-25 00:06:39,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:06:39,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:06:39,426 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_secure_zero [2023-11-25 00:06:39,427 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_secure_zero [2023-11-25 00:06:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-25 00:06:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:06:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-25 00:06:39,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:06:39,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:06:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-25 00:06:39,428 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-25 00:06:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-25 00:06:39,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-25 00:06:39,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-25 00:06:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-25 00:06:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-25 00:06:39,429 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-25 00:06:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-25 00:06:39,430 INFO L130 BoogieDeclarations]: Found specification of procedure assert_all_bytes_are [2023-11-25 00:06:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_all_bytes_are [2023-11-25 00:06:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-25 00:06:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-25 00:06:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-25 00:06:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-11-25 00:06:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-11-25 00:06:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-11-25 00:06:39,432 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-11-25 00:06:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:06:39,799 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:06:39,802 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:06:41,144 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:06:41,610 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:06:41,610 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-25 00:06:41,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:41 BoogieIcfgContainer [2023-11-25 00:06:41,612 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:06:41,616 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:06:41,617 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:06:41,620 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:06:41,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:06:35" (1/3) ... [2023-11-25 00:06:41,621 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4d241a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:41, skipping insertion in model container [2023-11-25 00:06:41,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:06:38" (2/3) ... [2023-11-25 00:06:41,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4d241a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:06:41, skipping insertion in model container [2023-11-25 00:06:41,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:06:41" (3/3) ... [2023-11-25 00:06:41,627 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_reset_harness.i [2023-11-25 00:06:41,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:06:41,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-25 00:06:41,713 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:06:41,725 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;@3a831183, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:06:41,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-25 00:06:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-25 00:06:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-25 00:06:41,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:41,741 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:06:41,741 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:41,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:41,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1515666022, now seen corresponding path program 1 times [2023-11-25 00:06:41,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:41,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295190851] [2023-11-25 00:06:41,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:41,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:06:44,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:44,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295190851] [2023-11-25 00:06:44,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295190851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:44,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:44,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-25 00:06:44,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907182938] [2023-11-25 00:06:44,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:44,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-25 00:06:44,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:44,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-25 00:06:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-25 00:06:44,493 INFO L87 Difference]: Start difference. First operand has 81 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-25 00:06:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:45,671 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2023-11-25 00:06:45,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-25 00:06:45,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 31 [2023-11-25 00:06:45,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:45,683 INFO L225 Difference]: With dead ends: 121 [2023-11-25 00:06:45,683 INFO L226 Difference]: Without dead ends: 79 [2023-11-25 00:06:45,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-25 00:06:45,690 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 6 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:45,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 384 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-25 00:06:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-25 00:06:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-25 00:06:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-25 00:06:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2023-11-25 00:06:45,738 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 31 [2023-11-25 00:06:45,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:45,739 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2023-11-25 00:06:45,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-25 00:06:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2023-11-25 00:06:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-25 00:06:45,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:45,742 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-11-25 00:06:45,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:06:45,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:45,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:45,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2036248884, now seen corresponding path program 1 times [2023-11-25 00:06:45,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:45,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174661689] [2023-11-25 00:06:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:45,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-25 00:06:48,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:48,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174661689] [2023-11-25 00:06:48,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174661689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:48,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:48,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-25 00:06:48,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33539364] [2023-11-25 00:06:48,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:48,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-25 00:06:48,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:48,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-25 00:06:48,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-25 00:06:48,693 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-25 00:06:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:50,895 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2023-11-25 00:06:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-25 00:06:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2023-11-25 00:06:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:50,898 INFO L225 Difference]: With dead ends: 96 [2023-11-25 00:06:50,898 INFO L226 Difference]: Without dead ends: 94 [2023-11-25 00:06:50,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-25 00:06:50,900 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:50,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 120 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-25 00:06:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-25 00:06:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2023-11-25 00:06:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 51 states have internal predecessors, (55), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-25 00:06:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2023-11-25 00:06:50,919 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 37 [2023-11-25 00:06:50,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:50,920 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2023-11-25 00:06:50,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-25 00:06:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2023-11-25 00:06:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-25 00:06:50,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:50,923 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-25 00:06:50,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-25 00:06:50,923 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:50,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:50,924 INFO L85 PathProgramCache]: Analyzing trace with hash -717839228, now seen corresponding path program 1 times [2023-11-25 00:06:50,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:50,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079756577] [2023-11-25 00:06:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:50,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-25 00:06:54,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:54,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079756577] [2023-11-25 00:06:54,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079756577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:54,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:54,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-25 00:06:54,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703417181] [2023-11-25 00:06:54,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:54,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-25 00:06:54,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-25 00:06:54,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-25 00:06:54,057 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-25 00:06:55,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:55,802 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2023-11-25 00:06:55,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-25 00:06:55,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 44 [2023-11-25 00:06:55,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:55,804 INFO L225 Difference]: With dead ends: 133 [2023-11-25 00:06:55,804 INFO L226 Difference]: Without dead ends: 94 [2023-11-25 00:06:55,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-25 00:06:55,806 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 24 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:55,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 417 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-25 00:06:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-25 00:06:55,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2023-11-25 00:06:55,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-25 00:06:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2023-11-25 00:06:55,823 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 44 [2023-11-25 00:06:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:55,824 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2023-11-25 00:06:55,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 7 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-11-25 00:06:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2023-11-25 00:06:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-25 00:06:55,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:55,826 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-11-25 00:06:55,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-25 00:06:55,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:55,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:55,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1421861248, now seen corresponding path program 1 times [2023-11-25 00:06:55,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:55,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297580056] [2023-11-25 00:06:55,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:55,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:06:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:06:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-25 00:06:58,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:06:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297580056] [2023-11-25 00:06:58,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297580056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:06:58,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:06:58,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:06:58,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213395467] [2023-11-25 00:06:58,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:06:58,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:06:58,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:06:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:06:58,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:06:58,024 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-25 00:06:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:06:59,799 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2023-11-25 00:06:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:06:59,800 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2023-11-25 00:06:59,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:06:59,802 INFO L225 Difference]: With dead ends: 100 [2023-11-25 00:06:59,803 INFO L226 Difference]: Without dead ends: 98 [2023-11-25 00:06:59,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:06:59,804 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-25 00:06:59,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 411 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-25 00:06:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-25 00:06:59,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2023-11-25 00:06:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-25 00:06:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 108 transitions. [2023-11-25 00:06:59,826 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 108 transitions. Word has length 43 [2023-11-25 00:06:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:06:59,827 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 108 transitions. [2023-11-25 00:06:59,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-25 00:06:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 108 transitions. [2023-11-25 00:06:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-25 00:06:59,829 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:06:59,830 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-25 00:06:59,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-25 00:06:59,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:06:59,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:06:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash -277074998, now seen corresponding path program 1 times [2023-11-25 00:06:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:06:59,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101609628] [2023-11-25 00:06:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:06:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-25 00:07:02,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:02,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101609628] [2023-11-25 00:07:02,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101609628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:07:02,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:07:02,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-25 00:07:02,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945575772] [2023-11-25 00:07:02,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:07:02,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-25 00:07:02,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-25 00:07:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-25 00:07:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-25 00:07:02,122 INFO L87 Difference]: Start difference. First operand 93 states and 108 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:07:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:07:03,030 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2023-11-25 00:07:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-25 00:07:03,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 49 [2023-11-25 00:07:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:07:03,034 INFO L225 Difference]: With dead ends: 104 [2023-11-25 00:07:03,034 INFO L226 Difference]: Without dead ends: 102 [2023-11-25 00:07:03,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-25 00:07:03,036 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-25 00:07:03,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 364 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-25 00:07:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-25 00:07:03,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2023-11-25 00:07:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-25 00:07:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2023-11-25 00:07:03,057 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 49 [2023-11-25 00:07:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:07:03,057 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2023-11-25 00:07:03,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-25 00:07:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2023-11-25 00:07:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-25 00:07:03,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:07:03,061 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-25 00:07:03,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-25 00:07:03,061 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:07:03,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:07:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1078723445, now seen corresponding path program 1 times [2023-11-25 00:07:03,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:07:03,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088028148] [2023-11-25 00:07:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:03,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:07:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-25 00:07:11,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-25 00:07:11,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088028148] [2023-11-25 00:07:11,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088028148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-25 00:07:11,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301861307] [2023-11-25 00:07:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:07:11,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-25 00:07:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:07:11,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-25 00:07:11,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_336ee8f6-ac0b-4d6e-a6bc-e15e4647e1fb/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-25 00:07:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:07:12,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-25 00:07:12,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:07:12,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-25 00:07:12,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1