./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.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_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/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_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/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_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/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 b9c6758ce95672dce3a80ced0038fb12c5d303c7f51f11e2d6af9ddfb735b727 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:40:04,212 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:40:04,283 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 13:40:04,288 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:40:04,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:40:04,313 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:40:04,313 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:40:04,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:40:04,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:40:04,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:40:04,316 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:40:04,316 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:40:04,317 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:40:04,317 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:40:04,318 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:40:04,318 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:40:04,319 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:40:04,319 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:40:04,320 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:40:04,320 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:40:04,321 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:40:04,322 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:40:04,322 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:40:04,323 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:40:04,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:40:04,324 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:40:04,325 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:40:04,325 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:40:04,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:40:04,326 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:40:04,326 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:40:04,327 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:40:04,327 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:40:04,328 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:40:04,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:40:04,328 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:40:04,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:40:04,329 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:40:04,329 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:40:04,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:40:04,330 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:40:04,330 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:40:04,330 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:40:04,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:40:04,331 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_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9c6758ce95672dce3a80ced0038fb12c5d303c7f51f11e2d6af9ddfb735b727 [2023-12-02 13:40:04,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:40:04,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:40:04,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:40:04,594 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:40:04,595 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:40:04,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i [2023-12-02 13:40:07,389 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:40:07,831 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:40:07,832 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i [2023-12-02 13:40:07,872 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/data/4133cc6d7/e275770a01444b8988aedb8e216544e7/FLAG4821ad136 [2023-12-02 13:40:07,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/data/4133cc6d7/e275770a01444b8988aedb8e216544e7 [2023-12-02 13:40:07,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:40:07,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:40:07,892 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:40:07,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:40:07,897 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:40:07,898 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:40:07" (1/1) ... [2023-12-02 13:40:07,899 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5248e86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:07, skipping insertion in model container [2023-12-02 13:40:07,900 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:40:07" (1/1) ... [2023-12-02 13:40:08,071 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:40:08,296 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_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i[4495,4508] [2023-12-02 13:40:08,303 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_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i[4555,4568] [2023-12-02 13:40:09,290 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,291 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,291 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,292 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,293 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,308 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,309 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,311 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,312 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,314 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,315 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,316 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,317 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:09,734 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 13:40:09,735 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 13:40:09,736 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 13:40:09,737 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 13:40:09,739 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 13:40:09,740 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 13:40:09,741 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 13:40:09,741 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 13:40:09,742 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 13:40:09,743 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 13:40:10,250 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,250 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,273 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,274 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,280 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,280 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,296 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,297 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,298 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,299 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,299 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,300 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,300 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:40:10,370 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:40:10,382 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_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i[4495,4508] [2023-12-02 13:40:10,382 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_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/sv-benchmarks/c/aws-c-common/aws_hash_table_remove_harness_negated.i[4555,4568] [2023-12-02 13:40:10,420 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,420 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,421 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,421 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,422 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,429 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,429 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,430 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,430 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,431 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,431 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,432 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,432 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,461 WARN L638 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-12-02 13:40:10,462 WARN L638 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-12-02 13:40:10,463 WARN L638 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-12-02 13:40:10,464 WARN L638 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-12-02 13:40:10,496 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-12-02 13:40:10,497 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-12-02 13:40:10,502 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-12-02 13:40:10,502 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-12-02 13:40:10,503 WARN L638 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-12-02 13:40:10,503 WARN L638 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-12-02 13:40:10,536 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7544-7555] [2023-12-02 13:40:10,599 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,599 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,605 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,606 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,608 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,608 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,616 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,617 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,617 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,618 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,618 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,618 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,619 WARN L1590 CHandler]: Possible shadowing of function index [2023-12-02 13:40:10,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:40:10,949 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,949 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,949 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,950 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,950 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,950 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,950 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,950 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,950 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,950 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,950 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,950 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,951 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,951 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,951 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,951 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,951 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,951 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 13:40:10,959 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:40:10,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10 WrapperNode [2023-12-02 13:40:10,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:40:10,960 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:40:10,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:40:10,961 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:40:10,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,065 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,151 INFO L138 Inliner]: procedures = 773, calls = 2500, calls flagged for inlining = 69, calls inlined = 19, statements flattened = 1094 [2023-12-02 13:40:11,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:40:11,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:40:11,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:40:11,153 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:40:11,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,172 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,172 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,216 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,237 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,244 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,258 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:40:11,259 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:40:11,259 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:40:11,259 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:40:11,260 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (1/1) ... [2023-12-02 13:40:11,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:40:11,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:11,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:40:11,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:40:11,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-12-02 13:40:11,327 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2023-12-02 13:40:11,327 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2023-12-02 13:40:11,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~real [2023-12-02 13:40:11,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:40:11,327 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-12-02 13:40:11,328 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-12-02 13:40:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 13:40:11,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 13:40:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-12-02 13:40:11,328 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-12-02 13:40:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 13:40:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:40:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 13:40:11,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:40:11,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:40:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-12-02 13:40:11,329 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-12-02 13:40:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-12-02 13:40:11,329 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-12-02 13:40:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 13:40:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:40:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-12-02 13:40:11,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-12-02 13:40:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 13:40:11,329 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-12-02 13:40:11,330 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-12-02 13:40:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:40:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_for [2023-12-02 13:40:11,330 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_for [2023-12-02 13:40:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure my_memset [2023-12-02 13:40:11,330 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memset [2023-12-02 13:40:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-12-02 13:40:11,330 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-12-02 13:40:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure s_hash_keys_eq [2023-12-02 13:40:11,330 INFO L138 BoogieDeclarations]: Found implementation of procedure s_hash_keys_eq [2023-12-02 13:40:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-12-02 13:40:11,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-12-02 13:40:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:40:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 13:40:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-12-02 13:40:11,331 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-12-02 13:40:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 13:40:11,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 13:40:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-12-02 13:40:11,331 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-12-02 13:40:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure s_safe_eq_check [2023-12-02 13:40:11,332 INFO L138 BoogieDeclarations]: Found implementation of procedure s_safe_eq_check [2023-12-02 13:40:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure s_find_entry [2023-12-02 13:40:11,332 INFO L138 BoogieDeclarations]: Found implementation of procedure s_find_entry [2023-12-02 13:40:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 13:40:11,332 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 13:40:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-12-02 13:40:11,332 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-12-02 13:40:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 13:40:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2023-12-02 13:40:11,333 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2023-12-02 13:40:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-12-02 13:40:11,333 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-12-02 13:40:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-12-02 13:40:11,333 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-12-02 13:40:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2023-12-02 13:40:11,333 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2023-12-02 13:40:11,333 INFO L130 BoogieDeclarations]: Found specification of procedure memset_impl [2023-12-02 13:40:11,333 INFO L138 BoogieDeclarations]: Found implementation of procedure memset_impl [2023-12-02 13:40:11,334 INFO L130 BoogieDeclarations]: Found specification of procedure uninterpreted_equals [2023-12-02 13:40:11,334 INFO L138 BoogieDeclarations]: Found implementation of procedure uninterpreted_equals [2023-12-02 13:40:11,334 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-12-02 13:40:11,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-12-02 13:40:11,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:40:11,652 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:40:11,654 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:40:11,864 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2023-12-02 13:40:11,864 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true; [2023-12-02 13:40:11,895 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume !true; [2023-12-02 13:40:11,940 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-12-02 13:40:12,999 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume !true; [2023-12-02 13:40:12,999 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !true; [2023-12-02 13:40:13,034 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:40:13,310 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:40:13,311 INFO L309 CfgBuilder]: Removed 16 assume(true) statements. [2023-12-02 13:40:13,312 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:40:13 BoogieIcfgContainer [2023-12-02 13:40:13,312 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:40:13,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:40:13,315 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:40:13,317 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:40:13,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:40:07" (1/3) ... [2023-12-02 13:40:13,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dc5d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:40:13, skipping insertion in model container [2023-12-02 13:40:13,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:40:10" (2/3) ... [2023-12-02 13:40:13,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8dc5d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:40:13, skipping insertion in model container [2023-12-02 13:40:13,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:40:13" (3/3) ... [2023-12-02 13:40:13,320 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_remove_harness_negated.i [2023-12-02 13:40:13,336 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:40:13,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:40:13,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:40:13,391 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;@e9f4ccc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:40:13,392 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:40:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-12-02 13:40:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-12-02 13:40:13,412 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:13,413 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:40:13,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:40:13,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash 530917128, now seen corresponding path program 1 times [2023-12-02 13:40:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683735212] [2023-12-02 13:40:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:13,797 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-02 13:40:13,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691711018] [2023-12-02 13:40:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:13,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:13,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:13,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:13,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:40:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:40:14,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 2610 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:40:14,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-12-02 13:40:14,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:40:14,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683735212] [2023-12-02 13:40:14,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-02 13:40:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691711018] [2023-12-02 13:40:14,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691711018] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:40:14,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:40:14,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:40:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140395674] [2023-12-02 13:40:14,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:40:14,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:40:14,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:14,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:40:14,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:40:14,711 INFO L87 Difference]: Start difference. First operand has 259 states, 149 states have (on average 1.221476510067114) internal successors, (182), 144 states have internal predecessors, (182), 87 states have call successors, (87), 27 states have call predecessors, (87), 27 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 13:40:15,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:40:15,190 INFO L93 Difference]: Finished difference Result 488 states and 698 transitions. [2023-12-02 13:40:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:40:15,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 127 [2023-12-02 13:40:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:40:15,203 INFO L225 Difference]: With dead ends: 488 [2023-12-02 13:40:15,203 INFO L226 Difference]: Without dead ends: 259 [2023-12-02 13:40:15,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 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 13:40:15,213 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:40:15,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1200 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:40:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-12-02 13:40:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2023-12-02 13:40:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 145 states have internal predecessors, (170), 87 states have call successors, (87), 27 states have call predecessors, (87), 28 states have return successors, (86), 86 states have call predecessors, (86), 85 states have call successors, (86) [2023-12-02 13:40:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 343 transitions. [2023-12-02 13:40:15,278 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 343 transitions. Word has length 127 [2023-12-02 13:40:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:40:15,280 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 343 transitions. [2023-12-02 13:40:15,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 13:40:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 343 transitions. [2023-12-02 13:40:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 13:40:15,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:15,284 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:40:15,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:40:15,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-02 13:40:15,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:40:15,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:15,488 INFO L85 PathProgramCache]: Analyzing trace with hash 953046530, now seen corresponding path program 1 times [2023-12-02 13:40:15,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:15,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207269652] [2023-12-02 13:40:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:15,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:40:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-12-02 13:40:17,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:17,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207269652] [2023-12-02 13:40:17,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207269652] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:40:17,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266506809] [2023-12-02 13:40:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:17,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:17,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:17,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:17,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:40:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:40:18,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 2609 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 13:40:18,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-02 13:40:18,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:40:18,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266506809] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:40:18,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:40:18,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-12-02 13:40:18,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565172839] [2023-12-02 13:40:18,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:40:18,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:40:18,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:18,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:40:18,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:40:18,455 INFO L87 Difference]: Start difference. First operand 259 states and 343 transitions. Second operand has 6 states, 3 states have (on average 17.666666666666668) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-12-02 13:40:19,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:40:19,264 INFO L93 Difference]: Finished difference Result 471 states and 633 transitions. [2023-12-02 13:40:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:40:19,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 17.666666666666668) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 131 [2023-12-02 13:40:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:40:19,270 INFO L225 Difference]: With dead ends: 471 [2023-12-02 13:40:19,270 INFO L226 Difference]: Without dead ends: 262 [2023-12-02 13:40:19,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:40:19,273 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 0 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:40:19,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1342 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 13:40:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-12-02 13:40:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2023-12-02 13:40:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 144 states have (on average 1.1875) internal successors, (171), 147 states have internal predecessors, (171), 87 states have call successors, (87), 27 states have call predecessors, (87), 29 states have return successors, (91), 86 states have call predecessors, (91), 85 states have call successors, (91) [2023-12-02 13:40:19,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 349 transitions. [2023-12-02 13:40:19,304 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 349 transitions. Word has length 131 [2023-12-02 13:40:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:40:19,305 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 349 transitions. [2023-12-02 13:40:19,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 17.666666666666668) internal successors, (53), 5 states have internal predecessors, (53), 3 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-12-02 13:40:19,305 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 349 transitions. [2023-12-02 13:40:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-12-02 13:40:19,308 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:40:19,308 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:40:19,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:40:19,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:19,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:40:19,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:40:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1193812291, now seen corresponding path program 1 times [2023-12-02 13:40:19,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:40:19,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545703371] [2023-12-02 13:40:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:19,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:40:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:40:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2023-12-02 13:40:20,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:40:20,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545703371] [2023-12-02 13:40:20,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545703371] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:40:20,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490565647] [2023-12-02 13:40:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:40:20,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:40:20,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:40:20,910 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:40:20,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:40:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:40:21,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 2633 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 13:40:21,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:40:21,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:40:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2023-12-02 13:40:22,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:40:22,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490565647] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:40:22,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:40:22,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2023-12-02 13:40:22,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105943664] [2023-12-02 13:40:22,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:40:22,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:40:22,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:40:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:40:22,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-12-02 13:40:22,121 INFO L87 Difference]: Start difference. First operand 261 states and 349 transitions. Second operand has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2023-12-02 13:40:26,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-02 13:40:28,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:30,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:32,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:34,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:36,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:38,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:40,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:43,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:45,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:47,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:50,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:52,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:54,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:56,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:40:58,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:41:00,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:41:02,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:41:04,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:41:06,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:41:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:41:06,873 INFO L93 Difference]: Finished difference Result 523 states and 689 transitions. [2023-12-02 13:41:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:41:06,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) Word has length 137 [2023-12-02 13:41:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:41:06,878 INFO L225 Difference]: With dead ends: 523 [2023-12-02 13:41:06,878 INFO L226 Difference]: Without dead ends: 305 [2023-12-02 13:41:06,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2023-12-02 13:41:06,880 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 67 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 17 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:41:06,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1479 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 758 Invalid, 20 Unknown, 0 Unchecked, 44.6s Time] [2023-12-02 13:41:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-12-02 13:41:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2023-12-02 13:41:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 170 states have internal predecessors, (195), 95 states have call successors, (95), 37 states have call predecessors, (95), 39 states have return successors, (96), 94 states have call predecessors, (96), 93 states have call successors, (96) [2023-12-02 13:41:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 386 transitions. [2023-12-02 13:41:06,912 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 386 transitions. Word has length 137 [2023-12-02 13:41:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:41:06,913 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 386 transitions. [2023-12-02 13:41:06,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 6.222222222222222) internal successors, (56), 10 states have internal predecessors, (56), 5 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 5 states have call predecessors, (31), 5 states have call successors, (31) [2023-12-02 13:41:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 386 transitions. [2023-12-02 13:41:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 13:41:06,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:41:06,916 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:41:06,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:41:07,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:41:07,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:41:07,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:41:07,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1638732790, now seen corresponding path program 1 times [2023-12-02 13:41:07,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:41:07,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452224938] [2023-12-02 13:41:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:41:07,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:41:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:41:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-12-02 13:41:08,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:41:08,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452224938] [2023-12-02 13:41:08,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452224938] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:41:08,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:41:08,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:41:08,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432033624] [2023-12-02 13:41:08,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:41:08,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:41:08,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:41:08,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:41:08,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:41:08,081 INFO L87 Difference]: Start difference. First operand 302 states and 386 transitions. Second operand has 5 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2023-12-02 13:41:08,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:41:08,971 INFO L93 Difference]: Finished difference Result 477 states and 627 transitions. [2023-12-02 13:41:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:41:08,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 141 [2023-12-02 13:41:08,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:41:08,976 INFO L225 Difference]: With dead ends: 477 [2023-12-02 13:41:08,976 INFO L226 Difference]: Without dead ends: 305 [2023-12-02 13:41:08,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:41:08,978 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 0 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 13:41:08,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1077 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 13:41:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-12-02 13:41:09,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2023-12-02 13:41:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 172 states have internal predecessors, (196), 95 states have call successors, (95), 37 states have call predecessors, (95), 40 states have return successors, (103), 94 states have call predecessors, (103), 93 states have call successors, (103) [2023-12-02 13:41:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 394 transitions. [2023-12-02 13:41:09,032 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 394 transitions. Word has length 141 [2023-12-02 13:41:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:41:09,032 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 394 transitions. [2023-12-02 13:41:09,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2023-12-02 13:41:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 394 transitions. [2023-12-02 13:41:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 13:41:09,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:41:09,036 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:41:09,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:41:09,036 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:41:09,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:41:09,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1947360745, now seen corresponding path program 1 times [2023-12-02 13:41:09,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:41:09,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579643633] [2023-12-02 13:41:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:41:09,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:41:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:41:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2023-12-02 13:41:11,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:41:11,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579643633] [2023-12-02 13:41:11,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579643633] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:41:11,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556793872] [2023-12-02 13:41:11,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:41:11,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:41:11,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:41:11,092 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:41:11,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:41:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:41:11,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 13:41:11,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:41:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-12-02 13:41:11,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:41:11,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556793872] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:41:11,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:41:11,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2023-12-02 13:41:11,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627071157] [2023-12-02 13:41:11,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:41:11,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:41:11,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:41:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:41:11,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:41:11,925 INFO L87 Difference]: Start difference. First operand 304 states and 394 transitions. Second operand has 6 states, 3 states have (on average 20.333333333333332) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2023-12-02 13:41:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:41:12,654 INFO L93 Difference]: Finished difference Result 495 states and 662 transitions. [2023-12-02 13:41:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:41:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 3 states have (on average 20.333333333333332) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 145 [2023-12-02 13:41:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:41:12,658 INFO L225 Difference]: With dead ends: 495 [2023-12-02 13:41:12,658 INFO L226 Difference]: Without dead ends: 307 [2023-12-02 13:41:12,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:41:12,660 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 0 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:41:12,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1342 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:41:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-12-02 13:41:12,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2023-12-02 13:41:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 169 states have (on average 1.165680473372781) internal successors, (197), 174 states have internal predecessors, (197), 95 states have call successors, (95), 37 states have call predecessors, (95), 41 states have return successors, (107), 94 states have call predecessors, (107), 93 states have call successors, (107) [2023-12-02 13:41:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 399 transitions. [2023-12-02 13:41:12,684 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 399 transitions. Word has length 145 [2023-12-02 13:41:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:41:12,685 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 399 transitions. [2023-12-02 13:41:12,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 3 states have (on average 20.333333333333332) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2023-12-02 13:41:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 399 transitions. [2023-12-02 13:41:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-02 13:41:12,688 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:41:12,688 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:41:12,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 13:41:12,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:41:12,891 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:41:12,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:41:12,892 INFO L85 PathProgramCache]: Analyzing trace with hash -68657028, now seen corresponding path program 2 times [2023-12-02 13:41:12,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:41:12,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118633133] [2023-12-02 13:41:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:41:12,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:41:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:41:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-12-02 13:41:14,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:41:14,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118633133] [2023-12-02 13:41:14,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118633133] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:41:14,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770836249] [2023-12-02 13:41:14,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:41:14,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:41:14,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:41:14,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:41:14,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0a2887-ddf1-402f-9cf8-5467e49d77d6/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:41:21,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-02 13:41:21,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:41:21,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 2530 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 13:41:21,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:41:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 142 proven. 5 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2023-12-02 13:41:22,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:41:24,652 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 13:41:24,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-12-02 13:41:24,665 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-02 13:41:24,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 13:41:24,731 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-12-02 13:41:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770836249] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:41:24,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1414300474] [2023-12-02 13:41:24,756 INFO L159 IcfgInterpreter]: Started Sifa with 96 locations of interest [2023-12-02 13:41:24,756 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:41:24,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:41:24,766 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:41:24,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:51:24,596 WARN L293 SmtUtils]: Spent 5.14s 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 13:51:29,734 WARN L293 SmtUtils]: Spent 5.13s 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 13:51:37,464 WARN L293 SmtUtils]: Spent 7.72s 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 13:51:42,730 WARN L293 SmtUtils]: Spent 5.26s 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 13:51:47,863 WARN L293 SmtUtils]: Spent 5.13s 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 13:51:55,597 WARN L293 SmtUtils]: Spent 7.72s 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)