./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5 --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 f3174b0caf7483d7aa96d2ace1d661f4c70bbed9301f1108659fc7d611ebd9af --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:48:02,339 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:48:02,411 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:48:02,417 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:48:02,418 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:48:02,468 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:48:02,468 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:48:02,469 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:48:02,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:48:02,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:48:02,476 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:48:02,478 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:48:02,478 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:48:02,480 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:48:02,480 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:48:02,481 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:48:02,481 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:48:02,482 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:48:02,482 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:48:02,483 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:48:02,483 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:48:02,484 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:48:02,485 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:48:02,485 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:48:02,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:48:02,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:48:02,487 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:48:02,487 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:48:02,488 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:48:02,488 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:48:02,489 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:48:02,490 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:48:02,490 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:48:02,490 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:48:02,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:48:02,491 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:48:02,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:48:02,491 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:48:02,491 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:48:02,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:48:02,492 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:48:02,492 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:48:02,492 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:48:02,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:48:02,494 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_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3174b0caf7483d7aa96d2ace1d661f4c70bbed9301f1108659fc7d611ebd9af [2023-11-21 19:48:02,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:48:02,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:48:02,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:48:02,862 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:48:02,863 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:48:02,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i [2023-11-21 19:48:06,216 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:48:06,806 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:48:06,807 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i [2023-11-21 19:48:06,862 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/data/683cf58d7/51cd314e96f74b4c82dc6bc549898357/FLAGd069315a3 [2023-11-21 19:48:06,882 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/data/683cf58d7/51cd314e96f74b4c82dc6bc549898357 [2023-11-21 19:48:06,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:48:06,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:48:06,897 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:48:06,897 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:48:06,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:48:06,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:48:06" (1/1) ... [2023-11-21 19:48:06,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2d020b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:06, skipping insertion in model container [2023-11-21 19:48:06,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:48:06" (1/1) ... [2023-11-21 19:48:07,092 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:48:07,374 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_c6be205f-05e2-467d-809c-6d9049adb75c/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4493,4506] [2023-11-21 19:48:07,384 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_c6be205f-05e2-467d-809c-6d9049adb75c/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4553,4566] [2023-11-21 19:48:08,471 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:08,480 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:08,482 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:08,488 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:08,490 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:08,510 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:08,511 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:08,513 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:08,514 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,042 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 19:48:09,044 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 19:48:09,045 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 19:48:09,047 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 19:48:09,049 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 19:48:09,069 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 19:48:09,069 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 19:48:09,070 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 19:48:09,071 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 19:48:09,072 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 19:48:09,421 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,422 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:48:09,505 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:48:09,530 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_c6be205f-05e2-467d-809c-6d9049adb75c/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4493,4506] [2023-11-21 19:48:09,531 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_c6be205f-05e2-467d-809c-6d9049adb75c/sv-benchmarks/c/aws-c-common/aws_string_eq_c_str_harness_negated.i[4553,4566] [2023-11-21 19:48:09,595 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,596 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,596 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,597 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,600 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,620 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,620 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,623 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,624 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,678 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 19:48:09,679 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 19:48:09,680 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 19:48:09,689 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 19:48:09,692 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 19:48:09,692 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 19:48:09,693 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 19:48:09,693 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 19:48:09,697 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 19:48:09,697 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 19:48:09,892 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8556] [2023-11-21 19:48:09,894 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,894 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:48:09,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:48:10,144 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,145 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,145 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,145 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,145 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,145 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,145 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,145 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,145 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,146 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,146 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,146 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,146 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,146 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,146 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,146 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,146 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:48:10,154 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:48:10,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10 WrapperNode [2023-11-21 19:48:10,155 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:48:10,156 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:48:10,156 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:48:10,156 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:48:10,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,320 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,427 INFO L138 Inliner]: procedures = 680, calls = 2274, calls flagged for inlining = 60, calls inlined = 8, statements flattened = 390 [2023-11-21 19:48:10,428 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:48:10,429 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:48:10,429 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:48:10,429 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:48:10,441 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,465 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,526 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,537 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,548 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:48:10,549 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:48:10,549 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:48:10,549 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:48:10,550 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (1/1) ... [2023-11-21 19:48:10,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:48:10,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:10,602 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:48:10,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:48:10,659 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq_c_str [2023-11-21 19:48:10,659 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq_c_str [2023-11-21 19:48:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-11-21 19:48:10,660 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-11-21 19:48:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-11-21 19:48:10,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-11-21 19:48:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-11-21 19:48:10,660 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-11-21 19:48:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:48:10,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:48:10,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:48:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:48:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:48:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:48:10,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:48:10,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:48:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-21 19:48:10,663 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-21 19:48:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:48:10,663 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:48:10,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:48:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-11-21 19:48:10,664 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-11-21 19:48:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-21 19:48:10,664 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-21 19:48:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:48:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:48:11,014 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:48:11,017 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:48:11,716 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:48:11,861 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:48:11,862 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:48:11,864 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:48:11 BoogieIcfgContainer [2023-11-21 19:48:11,865 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:48:11,868 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:48:11,868 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:48:11,872 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:48:11,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:48:06" (1/3) ... [2023-11-21 19:48:11,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9128a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:48:11, skipping insertion in model container [2023-11-21 19:48:11,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:48:10" (2/3) ... [2023-11-21 19:48:11,876 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9128a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:48:11, skipping insertion in model container [2023-11-21 19:48:11,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:48:11" (3/3) ... [2023-11-21 19:48:11,878 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_eq_c_str_harness_negated.i [2023-11-21 19:48:11,901 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:48:11,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:48:11,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:48:11,987 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;@6497b31b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:48:11,987 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:48:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 50 states have (on average 1.26) internal successors, (63), 51 states have internal predecessors, (63), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-21 19:48:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 19:48:12,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:12,005 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 19:48:12,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:12,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:12,016 INFO L85 PathProgramCache]: Analyzing trace with hash -914489389, now seen corresponding path program 1 times [2023-11-21 19:48:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:12,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339169307] [2023-11-21 19:48:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 19:48:13,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:13,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339169307] [2023-11-21 19:48:13,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339169307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:13,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:13,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:13,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978860526] [2023-11-21 19:48:13,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:13,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:48:13,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:13,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:48:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:48:13,144 INFO L87 Difference]: Start difference. First operand has 87 states, 50 states have (on average 1.26) internal successors, (63), 51 states have internal predecessors, (63), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 19:48:13,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:13,326 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2023-11-21 19:48:13,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:48:13,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-11-21 19:48:13,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:13,343 INFO L225 Difference]: With dead ends: 130 [2023-11-21 19:48:13,343 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 19:48:13,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:48:13,365 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 7 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:13,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 294 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:48:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 19:48:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 19:48:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-21 19:48:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2023-11-21 19:48:13,467 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 26 [2023-11-21 19:48:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:13,470 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2023-11-21 19:48:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 19:48:13,470 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2023-11-21 19:48:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 19:48:13,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:13,478 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-21 19:48:13,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:48:13,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:13,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1796768763, now seen corresponding path program 1 times [2023-11-21 19:48:13,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:13,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568075509] [2023-11-21 19:48:13,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 19:48:14,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568075509] [2023-11-21 19:48:14,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568075509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:14,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:14,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 19:48:14,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412757352] [2023-11-21 19:48:14,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:14,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 19:48:14,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 19:48:14,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:48:14,041 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-21 19:48:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:14,239 INFO L93 Difference]: Finished difference Result 111 states and 138 transitions. [2023-11-21 19:48:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:48:14,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 45 [2023-11-21 19:48:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:14,244 INFO L225 Difference]: With dead ends: 111 [2023-11-21 19:48:14,245 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 19:48:14,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:48:14,247 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 6 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:14,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 521 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:48:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 19:48:14,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 19:48:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 48 states have internal predecessors, (55), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-21 19:48:14,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2023-11-21 19:48:14,274 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 45 [2023-11-21 19:48:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:14,275 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2023-11-21 19:48:14,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-21 19:48:14,275 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2023-11-21 19:48:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 19:48:14,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:14,278 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-21 19:48:14,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:48:14,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:14,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1370180413, now seen corresponding path program 1 times [2023-11-21 19:48:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:14,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791789428] [2023-11-21 19:48:14,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 19:48:14,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:14,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791789428] [2023-11-21 19:48:14,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791789428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:48:14,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:48:14,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:48:14,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813322800] [2023-11-21 19:48:14,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:48:14,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:48:14,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:48:14,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:48:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:48:14,585 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 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) [2023-11-21 19:48:14,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:48:14,695 INFO L93 Difference]: Finished difference Result 131 states and 167 transitions. [2023-11-21 19:48:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:48:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 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 46 [2023-11-21 19:48:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:48:14,698 INFO L225 Difference]: With dead ends: 131 [2023-11-21 19:48:14,698 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 19:48:14,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:48:14,701 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:48:14,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 271 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:48:14,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 19:48:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 19:48:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 47 states have (on average 1.148936170212766) internal successors, (54), 48 states have internal predecessors, (54), 26 states have call successors, (26), 9 states have call predecessors, (26), 9 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-11-21 19:48:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-11-21 19:48:14,715 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 46 [2023-11-21 19:48:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:48:14,715 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-11-21 19:48:14,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 3 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) [2023-11-21 19:48:14,716 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-11-21 19:48:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-21 19:48:14,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:48:14,719 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:48:14,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:48:14,719 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:48:14,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:48:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1750816421, now seen corresponding path program 1 times [2023-11-21 19:48:14,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:48:14,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146691347] [2023-11-21 19:48:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:14,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:48:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-21 19:48:15,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:48:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146691347] [2023-11-21 19:48:15,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146691347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:48:15,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617084675] [2023-11-21 19:48:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:48:15,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:48:15,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:48:15,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:48:15,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6be205f-05e2-467d-809c-6d9049adb75c/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:48:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:48:15,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-21 19:48:15,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:48:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 19:48:16,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:48:18,107 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-21 19:48:18,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 40 [2023-11-21 19:48:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 19:48:18,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617084675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:48:18,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477318387] [2023-11-21 19:48:18,623 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2023-11-21 19:48:18,623 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:48:18,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:48:18,633 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:48:18,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs