./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_string_compare_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_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh --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 66fb9bfec5c458b51d86deb6748dd65f162e7ac6a772af5f3fec59d101a18d8d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 08:27:02,150 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 08:27:02,217 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 08:27:02,222 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 08:27:02,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 08:27:02,245 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 08:27:02,246 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 08:27:02,246 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 08:27:02,247 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 08:27:02,247 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 08:27:02,248 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 08:27:02,249 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 08:27:02,249 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 08:27:02,250 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 08:27:02,250 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 08:27:02,251 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 08:27:02,251 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 08:27:02,252 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 08:27:02,252 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 08:27:02,253 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 08:27:02,253 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 08:27:02,254 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 08:27:02,255 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 08:27:02,255 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 08:27:02,256 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 08:27:02,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 08:27:02,256 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 08:27:02,257 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 08:27:02,257 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 08:27:02,258 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 08:27:02,258 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 08:27:02,259 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 08:27:02,259 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 08:27:02,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 08:27:02,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:27:02,260 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 08:27:02,260 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 08:27:02,260 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 08:27:02,260 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 08:27:02,261 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 08:27:02,261 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 08:27:02,261 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 08:27:02,261 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 08:27:02,261 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 08:27:02,262 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_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66fb9bfec5c458b51d86deb6748dd65f162e7ac6a772af5f3fec59d101a18d8d [2023-12-02 08:27:02,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 08:27:02,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 08:27:02,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 08:27:02,516 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 08:27:02,516 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 08:27:02,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i [2023-12-02 08:27:05,298 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 08:27:05,698 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 08:27:05,699 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i [2023-12-02 08:27:05,736 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/data/a743a1c0d/927f6afcc8fb4ad295b0ac6e880919c0/FLAG0901a69d7 [2023-12-02 08:27:05,749 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/data/a743a1c0d/927f6afcc8fb4ad295b0ac6e880919c0 [2023-12-02 08:27:05,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 08:27:05,753 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 08:27:05,754 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 08:27:05,754 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 08:27:05,759 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 08:27:05,760 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:27:05" (1/1) ... [2023-12-02 08:27:05,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f47337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:05, skipping insertion in model container [2023-12-02 08:27:05,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:27:05" (1/1) ... [2023-12-02 08:27:05,863 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 08:27:06,101 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_240eaec8-8db7-4b7b-afb0-064c1589f66d/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i[4492,4505] [2023-12-02 08:27:06,108 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_240eaec8-8db7-4b7b-afb0-064c1589f66d/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i[4552,4565] [2023-12-02 08:27:06,908 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:06,908 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:06,909 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:06,910 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:06,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:06,925 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:06,926 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:06,928 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:06,929 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,305 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 08:27:07,307 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 08:27:07,308 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 08:27:07,310 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 08:27:07,311 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 08:27:07,312 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 08:27:07,313 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 08:27:07,314 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 08:27:07,315 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 08:27:07,315 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 08:27:07,583 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,584 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:27:07,722 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 08:27:07,734 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_240eaec8-8db7-4b7b-afb0-064c1589f66d/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i[4492,4505] [2023-12-02 08:27:07,734 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_240eaec8-8db7-4b7b-afb0-064c1589f66d/sv-benchmarks/c/aws-c-common/aws_string_compare_harness.i[4552,4565] [2023-12-02 08:27:07,801 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,802 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,802 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,803 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,804 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,808 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,809 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,810 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,810 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,841 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 08:27:07,842 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 08:27:07,842 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 08:27:07,843 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 08:27:07,843 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 08:27:07,844 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 08:27:07,844 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 08:27:07,845 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 08:27:07,845 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 08:27:07,846 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 08:27:07,910 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : "+r"(index)); [8253] [2023-12-02 08:27:07,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 08:27:07,921 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [8739-8750] [2023-12-02 08:27:07,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 08:27:08,198 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,198 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,198 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,199 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,199 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,199 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,199 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,199 WARN L675 CHandler]: The function s_global_handler is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,199 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,200 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,200 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,200 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,200 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,200 WARN L675 CHandler]: The function predicate is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,201 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,201 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,201 WARN L675 CHandler]: The function tl_thread_handler is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,201 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,201 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,201 WARN L675 CHandler]: The function memchr is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 08:27:08,210 INFO L206 MainTranslator]: Completed translation [2023-12-02 08:27:08,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08 WrapperNode [2023-12-02 08:27:08,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 08:27:08,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 08:27:08,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 08:27:08,212 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 08:27:08,220 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,297 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,360 INFO L138 Inliner]: procedures = 692, calls = 2785, calls flagged for inlining = 57, calls inlined = 5, statements flattened = 812 [2023-12-02 08:27:08,360 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 08:27:08,361 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 08:27:08,361 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 08:27:08,361 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 08:27:08,372 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,379 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,379 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,416 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,420 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,428 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,434 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 08:27:08,480 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 08:27:08,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 08:27:08,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 08:27:08,481 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (1/1) ... [2023-12-02 08:27:08,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 08:27:08,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:08,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 08:27:08,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 08:27:08,543 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_is_valid [2023-12-02 08:27:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_is_valid [2023-12-02 08:27:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_compare [2023-12-02 08:27:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_compare [2023-12-02 08:27:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_string_is_allocated_bounded_length [2023-12-02 08:27:08,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_string_is_allocated_bounded_length [2023-12-02 08:27:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-12-02 08:27:08,544 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 08:27:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 08:27:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 08:27:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 08:27:08,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 08:27:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 08:27:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 08:27:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 08:27:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 08:27:08,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 08:27:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 08:27:08,546 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 08:27:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 08:27:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure aws_string_bytes [2023-12-02 08:27:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_string_bytes [2023-12-02 08:27:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 08:27:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 08:27:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 08:27:08,547 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 08:27:08,547 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 08:27:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 08:27:08,548 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 08:27:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 08:27:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 08:27:08,773 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 08:27:08,776 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 08:27:09,759 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 08:27:09,931 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 08:27:09,931 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 08:27:09,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:27:09 BoogieIcfgContainer [2023-12-02 08:27:09,933 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 08:27:09,935 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 08:27:09,935 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 08:27:09,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 08:27:09,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:27:05" (1/3) ... [2023-12-02 08:27:09,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a999c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:27:09, skipping insertion in model container [2023-12-02 08:27:09,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:27:08" (2/3) ... [2023-12-02 08:27:09,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a999c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:27:09, skipping insertion in model container [2023-12-02 08:27:09,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:27:09" (3/3) ... [2023-12-02 08:27:09,940 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_string_compare_harness.i [2023-12-02 08:27:09,954 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 08:27:09,954 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 08:27:09,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 08:27:10,003 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;@2bc2f724, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 08:27:10,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 08:27:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 57 states have internal predecessors, (71), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-12-02 08:27:10,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 08:27:10,021 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:10,021 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] [2023-12-02 08:27:10,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:10,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash 499118031, now seen corresponding path program 1 times [2023-12-02 08:27:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:10,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34720418] [2023-12-02 08:27:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:10,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 08:27:10,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34720418] [2023-12-02 08:27:10,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34720418] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:10,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:27:10,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:27:10,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503097712] [2023-12-02 08:27:10,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:10,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:27:10,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:10,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:27:10,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:27:10,993 INFO L87 Difference]: Start difference. First operand has 101 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 57 states have internal predecessors, (71), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 08:27:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:11,166 INFO L93 Difference]: Finished difference Result 161 states and 228 transitions. [2023-12-02 08:27:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:27:11,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2023-12-02 08:27:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:11,179 INFO L225 Difference]: With dead ends: 161 [2023-12-02 08:27:11,179 INFO L226 Difference]: Without dead ends: 116 [2023-12-02 08:27:11,182 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 [2023-12-02 08:27:11,186 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 8 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:11,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 359 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:27:11,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-02 08:27:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2023-12-02 08:27:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.234375) internal successors, (79), 65 states have internal predecessors, (79), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-12-02 08:27:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 154 transitions. [2023-12-02 08:27:11,261 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 154 transitions. Word has length 41 [2023-12-02 08:27:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:11,262 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 154 transitions. [2023-12-02 08:27:11,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 08:27:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 154 transitions. [2023-12-02 08:27:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 08:27:11,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:11,267 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] [2023-12-02 08:27:11,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 08:27:11,267 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:11,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:11,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1424509934, now seen corresponding path program 1 times [2023-12-02 08:27:11,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:11,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145658441] [2023-12-02 08:27:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:11,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 08:27:11,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:11,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145658441] [2023-12-02 08:27:11,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145658441] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:11,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:27:11,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 08:27:11,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839723614] [2023-12-02 08:27:11,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:11,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 08:27:11,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 08:27:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 08:27:11,632 INFO L87 Difference]: Start difference. First operand 113 states and 154 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:27:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:11,757 INFO L93 Difference]: Finished difference Result 135 states and 181 transitions. [2023-12-02 08:27:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 08:27:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2023-12-02 08:27:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:11,760 INFO L225 Difference]: With dead ends: 135 [2023-12-02 08:27:11,760 INFO L226 Difference]: Without dead ends: 119 [2023-12-02 08:27:11,761 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 [2023-12-02 08:27:11,762 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 0 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:11,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 356 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 08:27:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-02 08:27:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-12-02 08:27:11,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 38 states have call successors, (38), 10 states have call predecessors, (38), 11 states have return successors, (39), 39 states have call predecessors, (39), 37 states have call successors, (39) [2023-12-02 08:27:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 161 transitions. [2023-12-02 08:27:11,781 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 161 transitions. Word has length 45 [2023-12-02 08:27:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:11,782 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 161 transitions. [2023-12-02 08:27:11,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 08:27:11,782 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 161 transitions. [2023-12-02 08:27:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 08:27:11,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:11,785 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] [2023-12-02 08:27:11,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 08:27:11,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:11,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:11,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2010863355, now seen corresponding path program 1 times [2023-12-02 08:27:11,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:11,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098734962] [2023-12-02 08:27:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:11,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 08:27:12,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:12,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098734962] [2023-12-02 08:27:12,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098734962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:12,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:27:12,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 08:27:12,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370363144] [2023-12-02 08:27:12,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:12,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:27:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:27:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:27:12,660 INFO L87 Difference]: Start difference. First operand 119 states and 161 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 08:27:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:12,887 INFO L93 Difference]: Finished difference Result 143 states and 189 transitions. [2023-12-02 08:27:12,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 08:27:12,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 46 [2023-12-02 08:27:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:12,890 INFO L225 Difference]: With dead ends: 143 [2023-12-02 08:27:12,890 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 08:27:12,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 08:27:12,892 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 18 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:12,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 586 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:27:12,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 08:27:12,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-12-02 08:27:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 72 states have internal predecessors, (86), 40 states have call successors, (40), 10 states have call predecessors, (40), 11 states have return successors, (40), 40 states have call predecessors, (40), 38 states have call successors, (40) [2023-12-02 08:27:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 166 transitions. [2023-12-02 08:27:12,908 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 166 transitions. Word has length 46 [2023-12-02 08:27:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:12,909 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 166 transitions. [2023-12-02 08:27:12,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 08:27:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 166 transitions. [2023-12-02 08:27:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 08:27:12,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:12,914 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:12,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 08:27:12,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:12,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:12,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2111838917, now seen corresponding path program 1 times [2023-12-02 08:27:12,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:12,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927758733] [2023-12-02 08:27:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:12,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:13,550 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 08:27:13,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:13,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927758733] [2023-12-02 08:27:13,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927758733] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 08:27:13,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 08:27:13,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 08:27:13,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306398181] [2023-12-02 08:27:13,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 08:27:13,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 08:27:13,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 08:27:13,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 08:27:13,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 08:27:13,553 INFO L87 Difference]: Start difference. First operand 123 states and 166 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 08:27:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 08:27:13,763 INFO L93 Difference]: Finished difference Result 179 states and 236 transitions. [2023-12-02 08:27:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 08:27:13,764 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 62 [2023-12-02 08:27:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 08:27:13,768 INFO L225 Difference]: With dead ends: 179 [2023-12-02 08:27:13,768 INFO L226 Difference]: Without dead ends: 139 [2023-12-02 08:27:13,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 08:27:13,770 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 28 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 08:27:13,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 592 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 08:27:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-12-02 08:27:13,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2023-12-02 08:27:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 80 states have internal predecessors, (96), 41 states have call successors, (41), 11 states have call predecessors, (41), 13 states have return successors, (42), 42 states have call predecessors, (42), 40 states have call successors, (42) [2023-12-02 08:27:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 179 transitions. [2023-12-02 08:27:13,786 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 179 transitions. Word has length 62 [2023-12-02 08:27:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 08:27:13,787 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 179 transitions. [2023-12-02 08:27:13,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 08:27:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 179 transitions. [2023-12-02 08:27:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 08:27:13,790 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 08:27:13,790 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 08:27:13,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 08:27:13,791 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 08:27:13,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 08:27:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1572720129, now seen corresponding path program 1 times [2023-12-02 08:27:13,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 08:27:13,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811125280] [2023-12-02 08:27:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 08:27:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 08:27:54,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 08:27:54,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811125280] [2023-12-02 08:27:54,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811125280] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 08:27:54,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463662670] [2023-12-02 08:27:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 08:27:54,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 08:27:54,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 08:27:54,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 08:27:54,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_240eaec8-8db7-4b7b-afb0-064c1589f66d/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 08:27:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 08:27:54,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-02 08:27:54,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 08:27:55,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2023-12-02 08:27:55,923 INFO L349 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-12-02 08:27:55,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 106 [2023-12-02 08:27:56,003 INFO L349 Elim1Store]: treesize reduction 86, result has 1.1 percent of original size [2023-12-02 08:27:56,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 57 [2023-12-02 08:28:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 08:28:25,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 08:28:31,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2023-12-02 08:28:31,542 INFO L349 Elim1Store]: treesize reduction 14, result has 76.7 percent of original size [2023-12-02 08:28:31,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 110 [2023-12-02 08:28:31,790 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 08:28:31,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 185 treesize of output 180 [2023-12-02 08:28:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 08:28:33,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463662670] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 08:28:33,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929339464] [2023-12-02 08:28:33,198 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2023-12-02 08:28:33,198 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 08:28:33,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 08:28:33,205 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 08:28:33,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 08:36:16,110 INFO L197 IcfgInterpreter]: Interpreting procedure aws_string_is_valid with input of size 72 for LOIs [2023-12-02 08:36:16,193 INFO L197 IcfgInterpreter]: Interpreting procedure aws_string_compare with input of size 3745 for LOIs