./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/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_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/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_392ac2bf-a3a4-442e-9399-db8bcacbcf54/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 3bf4efa014e51efebc29a26fae4d93bdd4ac97a340040c60e527138ec3a88197 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:38:05,977 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:38:06,042 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 14:38:06,047 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:38:06,048 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:38:06,069 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:38:06,070 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:38:06,070 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:38:06,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:38:06,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:38:06,072 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:38:06,072 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:38:06,073 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:38:06,073 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:38:06,074 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:38:06,074 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:38:06,075 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:38:06,075 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:38:06,076 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:38:06,077 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:38:06,077 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:38:06,078 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:38:06,079 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:38:06,080 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:38:06,080 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:38:06,081 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:38:06,081 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:38:06,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:38:06,082 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:38:06,082 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:38:06,083 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:38:06,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:38:06,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:38:06,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:38:06,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:38:06,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:38:06,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:38:06,084 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:38:06,085 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:38:06,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:38:06,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:38:06,085 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:38:06,085 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:38:06,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:38:06,086 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_392ac2bf-a3a4-442e-9399-db8bcacbcf54/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3bf4efa014e51efebc29a26fae4d93bdd4ac97a340040c60e527138ec3a88197 [2023-12-02 14:38:06,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:38:06,307 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:38:06,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:38:06,311 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:38:06,311 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:38:06,312 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i [2023-12-02 14:38:09,080 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:38:09,503 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:38:09,504 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i [2023-12-02 14:38:09,537 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/data/df74fbc63/784360cac007472eb06b51f75ff7d7c0/FLAGdd7ae7e66 [2023-12-02 14:38:09,551 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/data/df74fbc63/784360cac007472eb06b51f75ff7d7c0 [2023-12-02 14:38:09,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:38:09,556 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:38:09,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:38:09,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:38:09,562 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:38:09,563 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:38:09" (1/1) ... [2023-12-02 14:38:09,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788f2526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:09, skipping insertion in model container [2023-12-02 14:38:09,564 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:38:09" (1/1) ... [2023-12-02 14:38:09,699 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:38:09,970 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_392ac2bf-a3a4-442e-9399-db8bcacbcf54/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4497,4510] [2023-12-02 14:38:09,978 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_392ac2bf-a3a4-442e-9399-db8bcacbcf54/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4557,4570] [2023-12-02 14:38:10,892 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,893 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,893 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,894 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,896 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,910 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,911 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,913 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,913 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,915 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,916 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,917 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:10,918 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,354 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 14:38:11,355 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 14:38:11,356 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 14:38:11,357 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 14:38:11,358 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 14:38:11,359 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 14:38:11,360 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 14:38:11,360 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 14:38:11,361 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 14:38:11,361 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 14:38:11,856 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,856 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,877 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,878 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,883 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,884 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,897 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,898 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,898 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,898 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,899 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,899 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,900 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:11,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:38:11,960 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:38:11,970 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_392ac2bf-a3a4-442e-9399-db8bcacbcf54/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4497,4510] [2023-12-02 14:38:11,971 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_392ac2bf-a3a4-442e-9399-db8bcacbcf54/sv-benchmarks/c/aws-c-common/aws_hash_table_clean_up_harness.i[4557,4570] [2023-12-02 14:38:12,003 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,003 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,004 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,004 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,005 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,011 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,011 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,012 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,012 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,014 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,014 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,014 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,015 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,038 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 14:38:12,039 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 14:38:12,039 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 14:38:12,040 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 14:38:12,041 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 14:38:12,041 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 14:38:12,042 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 14:38:12,042 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 14:38:12,043 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 14:38:12,043 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 14:38:12,072 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7585-7596] [2023-12-02 14:38:12,133 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,133 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,175 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,176 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,178 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,178 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,185 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,186 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,186 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,187 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,187 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,187 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,187 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 14:38:12,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:38:12,456 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,456 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,456 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,456 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,457 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,457 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,457 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,457 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,457 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,457 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,457 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,457 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,457 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,458 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,458 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,458 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,458 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,458 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:38:12,465 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:38:12,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12 WrapperNode [2023-12-02 14:38:12,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:38:12,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:38:12,466 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:38:12,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:38:12,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,636 INFO L138 Inliner]: procedures = 773, calls = 2446, calls flagged for inlining = 71, calls inlined = 16, statements flattened = 713 [2023-12-02 14:38:12,637 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:38:12,637 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:38:12,637 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:38:12,638 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:38:12,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,655 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,655 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,694 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,703 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,709 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,722 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:38:12,723 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:38:12,723 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:38:12,723 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:38:12,724 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (1/1) ... [2023-12-02 14:38:12,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:38:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:12,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:38:12,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:38:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure memset_override_0_impl [2023-12-02 14:38:12,794 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_override_0_impl [2023-12-02 14:38:12,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-12-02 14:38:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 14:38:12,795 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 14:38:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:38:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-12-02 14:38:12,795 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-12-02 14:38:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 14:38:12,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 14:38:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-12-02 14:38:12,795 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-12-02 14:38:12,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 14:38:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:38:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 14:38:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:38:12,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:38:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 14:38:12,796 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 14:38:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-12-02 14:38:12,796 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-12-02 14:38:12,796 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mem_release [2023-12-02 14:38:12,796 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mem_release [2023-12-02 14:38:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:38:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-12-02 14:38:12,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-12-02 14:38:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 14:38:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 14:38:12,797 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 14:38:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:38:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-12-02 14:38:12,797 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-12-02 14:38:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-12-02 14:38:12,798 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-12-02 14:38:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:38:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-12-02 14:38:12,798 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-12-02 14:38:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 14:38:12,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 14:38:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 14:38:12,798 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 14:38:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-12-02 14:38:12,799 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-12-02 14:38:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 14:38:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 14:38:12,799 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 14:38:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-12-02 14:38:12,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-12-02 14:38:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-12-02 14:38:12,799 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-12-02 14:38:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:38:13,078 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:38:13,080 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:38:13,899 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:38:14,072 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:38:14,073 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 14:38:14,074 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:38:14 BoogieIcfgContainer [2023-12-02 14:38:14,074 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:38:14,077 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:38:14,077 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:38:14,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:38:14,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:38:09" (1/3) ... [2023-12-02 14:38:14,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40789137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:38:14, skipping insertion in model container [2023-12-02 14:38:14,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:38:12" (2/3) ... [2023-12-02 14:38:14,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40789137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:38:14, skipping insertion in model container [2023-12-02 14:38:14,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:38:14" (3/3) ... [2023-12-02 14:38:14,083 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_clean_up_harness.i [2023-12-02 14:38:14,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:38:14,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 14:38:14,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:38:14,171 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;@3ed395, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:38:14,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 14:38:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 47 states have call successors, (47), 19 states have call predecessors, (47), 19 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2023-12-02 14:38:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-02 14:38:14,189 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:14,190 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1, 1, 1, 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 14:38:14,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:14,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:14,198 INFO L85 PathProgramCache]: Analyzing trace with hash 229750920, now seen corresponding path program 1 times [2023-12-02 14:38:14,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:14,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577946818] [2023-12-02 14:38:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:14,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:14,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 14:38:14,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091114596] [2023-12-02 14:38:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:14,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:14,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:14,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:38:14,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:38:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:15,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 2277 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 14:38:15,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:38:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-02 14:38:15,251 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:38:15,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577946818] [2023-12-02 14:38:15,252 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 14:38:15,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091114596] [2023-12-02 14:38:15,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091114596] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:15,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:15,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:38:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653737308] [2023-12-02 14:38:15,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:15,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:38:15,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:38:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:38:15,286 INFO L87 Difference]: Start difference. First operand has 156 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 89 states have internal predecessors, (105), 47 states have call successors, (47), 19 states have call predecessors, (47), 19 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) Second operand has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 14:38:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:15,709 INFO L93 Difference]: Finished difference Result 282 states and 369 transitions. [2023-12-02 14:38:15,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:38:15,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 94 [2023-12-02 14:38:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:15,723 INFO L225 Difference]: With dead ends: 282 [2023-12-02 14:38:15,723 INFO L226 Difference]: Without dead ends: 157 [2023-12-02 14:38:15,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:38:15,731 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:15,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 668 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:38:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-02 14:38:15,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-12-02 14:38:15,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 90 states have internal predecessors, (103), 47 states have call successors, (47), 19 states have call predecessors, (47), 20 states have return successors, (47), 47 states have call predecessors, (47), 46 states have call successors, (47) [2023-12-02 14:38:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 197 transitions. [2023-12-02 14:38:15,784 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 197 transitions. Word has length 94 [2023-12-02 14:38:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:15,786 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 197 transitions. [2023-12-02 14:38:15,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.5) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 14:38:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 197 transitions. [2023-12-02 14:38:15,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-02 14:38:15,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:15,792 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:38:15,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:38:15,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 14:38:15,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:15,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1161473874, now seen corresponding path program 1 times [2023-12-02 14:38:15,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:15,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012512791] [2023-12-02 14:38:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:15,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-02 14:38:17,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:17,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012512791] [2023-12-02 14:38:17,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012512791] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:17,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:17,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:38:17,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620032245] [2023-12-02 14:38:17,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:17,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:38:17,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:17,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:38:17,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:38:17,716 INFO L87 Difference]: Start difference. First operand 157 states and 197 transitions. Second operand has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-12-02 14:38:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:18,311 INFO L93 Difference]: Finished difference Result 266 states and 338 transitions. [2023-12-02 14:38:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:38:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) Word has length 98 [2023-12-02 14:38:18,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:18,316 INFO L225 Difference]: With dead ends: 266 [2023-12-02 14:38:18,316 INFO L226 Difference]: Without dead ends: 159 [2023-12-02 14:38:18,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:38:18,319 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 2 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:18,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1014 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:38:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-02 14:38:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2023-12-02 14:38:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 92 states have internal predecessors, (104), 47 states have call successors, (47), 19 states have call predecessors, (47), 21 states have return successors, (50), 47 states have call predecessors, (50), 46 states have call successors, (50) [2023-12-02 14:38:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 201 transitions. [2023-12-02 14:38:18,341 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 201 transitions. Word has length 98 [2023-12-02 14:38:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:18,342 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 201 transitions. [2023-12-02 14:38:18,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.0) internal successors, (42), 7 states have internal predecessors, (42), 4 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 4 states have call predecessors, (22), 4 states have call successors, (22) [2023-12-02 14:38:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 201 transitions. [2023-12-02 14:38:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-12-02 14:38:18,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:18,345 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:38:18,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:38:18,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:18,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1834973132, now seen corresponding path program 1 times [2023-12-02 14:38:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:18,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198245251] [2023-12-02 14:38:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:18,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-02 14:38:19,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:19,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198245251] [2023-12-02 14:38:19,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198245251] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:19,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:19,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:38:19,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238353498] [2023-12-02 14:38:19,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:19,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:38:19,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:19,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:38:19,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:38:19,606 INFO L87 Difference]: Start difference. First operand 159 states and 201 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-12-02 14:38:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:20,364 INFO L93 Difference]: Finished difference Result 273 states and 349 transitions. [2023-12-02 14:38:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 14:38:20,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 104 [2023-12-02 14:38:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:20,367 INFO L225 Difference]: With dead ends: 273 [2023-12-02 14:38:20,368 INFO L226 Difference]: Without dead ends: 164 [2023-12-02 14:38:20,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-12-02 14:38:20,370 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 50 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:20,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 850 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 14:38:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-12-02 14:38:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2023-12-02 14:38:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 94 states have internal predecessors, (106), 47 states have call successors, (47), 19 states have call predecessors, (47), 22 states have return successors, (51), 48 states have call predecessors, (51), 46 states have call successors, (51) [2023-12-02 14:38:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2023-12-02 14:38:20,390 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 104 [2023-12-02 14:38:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:20,391 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2023-12-02 14:38:20,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 8 states have internal predecessors, (46), 4 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2023-12-02 14:38:20,391 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2023-12-02 14:38:20,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-12-02 14:38:20,394 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:20,394 INFO L195 NwaCegarLoop]: trace histogram [10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:38:20,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:38:20,394 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:20,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:20,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1106873190, now seen corresponding path program 1 times [2023-12-02 14:38:20,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:20,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799905830] [2023-12-02 14:38:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:20,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-02 14:38:21,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:21,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799905830] [2023-12-02 14:38:21,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799905830] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:21,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:21,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 14:38:21,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593141793] [2023-12-02 14:38:21,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:21,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 14:38:21,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:21,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 14:38:21,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:38:21,782 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-12-02 14:38:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:22,917 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2023-12-02 14:38:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:38:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 108 [2023-12-02 14:38:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:22,920 INFO L225 Difference]: With dead ends: 169 [2023-12-02 14:38:22,920 INFO L226 Difference]: Without dead ends: 167 [2023-12-02 14:38:22,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-02 14:38:22,922 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 59 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:22,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 953 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 14:38:22,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-02 14:38:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2023-12-02 14:38:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 95 states have (on average 1.1473684210526316) internal successors, (109), 97 states have internal predecessors, (109), 47 states have call successors, (47), 20 states have call predecessors, (47), 23 states have return successors, (51), 48 states have call predecessors, (51), 46 states have call successors, (51) [2023-12-02 14:38:22,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 207 transitions. [2023-12-02 14:38:22,942 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 207 transitions. Word has length 108 [2023-12-02 14:38:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:22,943 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 207 transitions. [2023-12-02 14:38:22,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-12-02 14:38:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 207 transitions. [2023-12-02 14:38:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-12-02 14:38:22,946 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:22,946 INFO L195 NwaCegarLoop]: trace histogram [11, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:38:22,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:38:22,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:22,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:22,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1904585735, now seen corresponding path program 1 times [2023-12-02 14:38:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:22,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650441309] [2023-12-02 14:38:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:22,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-02 14:38:28,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:28,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650441309] [2023-12-02 14:38:28,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650441309] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:28,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:28,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-12-02 14:38:28,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056155947] [2023-12-02 14:38:28,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:28,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 14:38:28,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:28,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 14:38:28,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-12-02 14:38:28,602 INFO L87 Difference]: Start difference. First operand 166 states and 207 transitions. Second operand has 22 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) [2023-12-02 14:38:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:31,942 INFO L93 Difference]: Finished difference Result 194 states and 236 transitions. [2023-12-02 14:38:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 14:38:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) Word has length 123 [2023-12-02 14:38:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:31,944 INFO L225 Difference]: With dead ends: 194 [2023-12-02 14:38:31,944 INFO L226 Difference]: Without dead ends: 171 [2023-12-02 14:38:31,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 14:38:31,946 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 178 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1857 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:31,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 763 Invalid, 1960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1857 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 14:38:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-12-02 14:38:31,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2023-12-02 14:38:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 98 states have (on average 1.1428571428571428) internal successors, (112), 100 states have internal predecessors, (112), 47 states have call successors, (47), 21 states have call predecessors, (47), 24 states have return successors, (53), 48 states have call predecessors, (53), 46 states have call successors, (53) [2023-12-02 14:38:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 212 transitions. [2023-12-02 14:38:31,966 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 212 transitions. Word has length 123 [2023-12-02 14:38:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:31,967 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 212 transitions. [2023-12-02 14:38:31,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (27), 16 states have call predecessors, (27), 16 states have call successors, (27) [2023-12-02 14:38:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 212 transitions. [2023-12-02 14:38:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 14:38:31,969 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:31,970 INFO L195 NwaCegarLoop]: trace histogram [12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:38:31,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:38:31,970 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:31,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1050559820, now seen corresponding path program 1 times [2023-12-02 14:38:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:31,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187868061] [2023-12-02 14:38:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:31,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-12-02 14:38:32,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:32,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187868061] [2023-12-02 14:38:32,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187868061] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:32,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:32,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:38:32,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837289896] [2023-12-02 14:38:32,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:32,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:38:32,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:38:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:38:32,531 INFO L87 Difference]: Start difference. First operand 170 states and 212 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-12-02 14:38:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:32,997 INFO L93 Difference]: Finished difference Result 263 states and 325 transitions. [2023-12-02 14:38:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:38:32,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 125 [2023-12-02 14:38:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:32,999 INFO L225 Difference]: With dead ends: 263 [2023-12-02 14:38:32,999 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 14:38:33,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:38:33,001 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 3 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:33,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 601 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:38:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 14:38:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-12-02 14:38:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 98 states have (on average 1.1326530612244898) internal successors, (111), 100 states have internal predecessors, (111), 47 states have call successors, (47), 21 states have call predecessors, (47), 24 states have return successors, (53), 48 states have call predecessors, (53), 46 states have call successors, (53) [2023-12-02 14:38:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 211 transitions. [2023-12-02 14:38:33,019 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 211 transitions. Word has length 125 [2023-12-02 14:38:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:33,020 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 211 transitions. [2023-12-02 14:38:33,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-12-02 14:38:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 211 transitions. [2023-12-02 14:38:33,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 14:38:33,022 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:33,022 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:38:33,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:38:33,023 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 14:38:33,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:33,023 INFO L85 PathProgramCache]: Analyzing trace with hash 49123652, now seen corresponding path program 1 times [2023-12-02 14:38:33,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:33,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605830248] [2023-12-02 14:38:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:33,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-12-02 14:38:34,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:34,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605830248] [2023-12-02 14:38:34,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605830248] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:38:34,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345428596] [2023-12-02 14:38:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:34,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:38:34,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:38:34,312 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:38:34,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_392ac2bf-a3a4-442e-9399-db8bcacbcf54/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:38:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:34,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 2446 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 14:38:34,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:38:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-02 14:38:35,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:38:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-12-02 14:38:35,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345428596] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:38:35,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598231960] [2023-12-02 14:38:35,321 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2023-12-02 14:38:35,321 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:38:35,325 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:38:35,329 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:38:35,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:45:05,960 WARN L293 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 2227 DAG size of output: 2227 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 14:48:37,727 WARN L293 SmtUtils]: Spent 5.19s on a formula simplification that was a NOOP. DAG size: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 14:48:42,912 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 14:48:50,716 WARN L293 SmtUtils]: Spent 7.79s on a formula simplification. DAG size of input: 3169 DAG size of output: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 14:48:55,899 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification that was a NOOP. DAG size: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 14:49:01,108 WARN L293 SmtUtils]: Spent 5.20s on a formula simplification that was a NOOP. DAG size: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 14:49:08,932 WARN L293 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 3169 DAG size of output: 3167 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)