./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 44162e1142387f3513ac3cf9af71d3c7aa6399e99cd364d08a07ceb8efc80a41 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:56:23,457 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:56:23,563 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:56:23,568 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:56:23,569 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:56:23,596 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:56:23,597 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:56:23,598 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:56:23,599 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:56:23,600 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:56:23,601 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:56:23,601 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:56:23,602 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:56:23,603 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:56:23,603 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:56:23,604 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:56:23,605 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:56:23,606 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:56:23,606 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:56:23,607 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:56:23,608 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:56:23,609 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:56:23,610 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:56:23,611 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:56:23,611 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:56:23,612 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:56:23,613 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:56:23,613 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:56:23,614 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:56:23,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:56:23,615 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:56:23,616 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:56:23,616 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:56:23,617 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:56:23,617 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:56:23,618 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:56:23,618 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:56:23,619 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:56:23,619 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:56:23,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:56:23,620 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:56:23,620 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:56:23,620 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:56:23,621 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:56:23,621 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_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44162e1142387f3513ac3cf9af71d3c7aa6399e99cd364d08a07ceb8efc80a41 [2023-11-21 19:56:23,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:56:24,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:56:24,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:56:24,021 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:56:24,022 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:56:24,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i [2023-11-21 19:56:27,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:56:27,806 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:56:27,807 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i [2023-11-21 19:56:27,900 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/data/d88e48b38/fa050ae9b6934dd8a0beb7592a25afbf/FLAGc650df21a [2023-11-21 19:56:27,920 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/data/d88e48b38/fa050ae9b6934dd8a0beb7592a25afbf [2023-11-21 19:56:27,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:56:27,929 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:56:27,932 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:56:27,932 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:56:27,939 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:56:27,939 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:56:27" (1/1) ... [2023-11-21 19:56:27,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22a397fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:27, skipping insertion in model container [2023-11-21 19:56:27,941 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:56:27" (1/1) ... [2023-11-21 19:56:28,071 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:56:28,380 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_9afa639e-47d9-4511-b5fc-b0b4af27a656/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i[4496,4509] [2023-11-21 19:56:28,391 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_9afa639e-47d9-4511-b5fc-b0b4af27a656/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i[4556,4569] [2023-11-21 19:56:29,576 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,578 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,579 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,580 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,582 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,603 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,611 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,614 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,615 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,618 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,619 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,621 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:29,621 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:30,309 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 19:56:30,311 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 19:56:30,312 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 19:56:30,314 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 19:56:30,317 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 19:56:30,318 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 19:56:30,319 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 19:56:30,320 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 19:56:30,321 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 19:56:30,322 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 19:56:31,138 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,139 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,174 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,175 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,183 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,183 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,200 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,201 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,202 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,202 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,203 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,204 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,204 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:56:31,294 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:56:31,322 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_9afa639e-47d9-4511-b5fc-b0b4af27a656/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i[4496,4509] [2023-11-21 19:56:31,323 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_9afa639e-47d9-4511-b5fc-b0b4af27a656/sv-benchmarks/c/aws-c-common/aws_hash_table_foreach_harness.i[4556,4569] [2023-11-21 19:56:31,408 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,409 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,410 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,412 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,414 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,430 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,432 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,437 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,438 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,439 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,441 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,442 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,491 WARN L635 FunctionHandler]: implicit declaration of function __atomic_load_n [2023-11-21 19:56:31,493 WARN L635 FunctionHandler]: implicit declaration of function __atomic_store_n [2023-11-21 19:56:31,494 WARN L635 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2023-11-21 19:56:31,495 WARN L635 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2023-11-21 19:56:31,497 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2023-11-21 19:56:31,498 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2023-11-21 19:56:31,500 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2023-11-21 19:56:31,500 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2023-11-21 19:56:31,502 WARN L635 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2023-11-21 19:56:31,504 WARN L635 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2023-11-21 19:56:31,572 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" : : "r"(pBuf) : "memory"); [7558-7569] [2023-11-21 19:56:31,825 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,826 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,839 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,840 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,845 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,846 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,868 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,869 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,870 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,872 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,872 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,873 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,874 WARN L1590 CHandler]: Possible shadowing of function index [2023-11-21 19:56:31,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:56:32,225 WARN L675 CHandler]: The function __atomic_fetch_or is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,225 WARN L675 CHandler]: The function equals_fn is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,226 WARN L675 CHandler]: The function __atomic_fetch_sub is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,226 WARN L675 CHandler]: The function __atomic_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,226 WARN L675 CHandler]: The function __atomic_fetch_xor is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,226 WARN L675 CHandler]: The function htons is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,226 WARN L675 CHandler]: The function ntohl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,227 WARN L675 CHandler]: The function __atomic_compare_exchange_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,227 WARN L675 CHandler]: The function __atomic_fetch_add is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,227 WARN L675 CHandler]: The function fprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,227 WARN L675 CHandler]: The function htonl is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,227 WARN L675 CHandler]: The function __atomic_store_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,227 WARN L675 CHandler]: The function ntohs is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,228 WARN L675 CHandler]: The function __atomic_load_n is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,228 WARN L675 CHandler]: The function __atomic_thread_fence is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,228 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,228 WARN L675 CHandler]: The function __atomic_fetch_and is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,228 WARN L675 CHandler]: The function aws_array_list_ensure_capacity is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:56:32,238 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:56:32,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32 WrapperNode [2023-11-21 19:56:32,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:56:32,240 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:56:32,241 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:56:32,241 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:56:32,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,512 INFO L138 Inliner]: procedures = 773, calls = 2436, calls flagged for inlining = 69, calls inlined = 18, statements flattened = 964 [2023-11-21 19:56:32,521 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:56:32,522 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:56:32,522 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:56:32,522 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:56:32,532 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,550 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,551 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,636 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,643 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,681 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:56:32,682 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:56:32,683 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:56:32,683 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:56:32,684 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (1/1) ... [2023-11-21 19:56:32,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:56:32,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:56:32,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:56:32,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:56:32,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-21 19:56:32,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:56:32,778 INFO L130 BoogieDeclarations]: Found specification of procedure aws_raise_error [2023-11-21 19:56:32,778 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_raise_error [2023-11-21 19:56:32,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-21 19:56:32,778 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-21 19:56:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_is_valid [2023-11-21 19:56:32,779 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_is_valid [2023-11-21 19:56:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:56:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:56:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:56:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:56:32,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:56:32,779 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2023-11-21 19:56:32,780 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2023-11-21 19:56:32,780 INFO L130 BoogieDeclarations]: Found specification of procedure aws_mul_size_checked [2023-11-21 19:56:32,781 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_mul_size_checked [2023-11-21 19:56:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-21 19:56:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-21 19:56:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:56:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_plus [2023-11-21 19:56:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_plus [2023-11-21 19:56:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:56:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2023-11-21 19:56:32,782 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2023-11-21 19:56:32,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:56:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure aws_is_power_of_two [2023-11-21 19:56:32,783 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_is_power_of_two [2023-11-21 19:56:32,783 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_equals [2023-11-21 19:56:32,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_equals [2023-11-21 19:56:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:56:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure hash_table_state_required_bytes [2023-11-21 19:56:32,784 INFO L138 BoogieDeclarations]: Found implementation of procedure hash_table_state_required_bytes [2023-11-21 19:56:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 19:56:32,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-21 19:56:32,784 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_uninterpreted_hasher [2023-11-21 19:56:32,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_uninterpreted_hasher [2023-11-21 19:56:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure s_get_next_element [2023-11-21 19:56:32,785 INFO L138 BoogieDeclarations]: Found implementation of procedure s_get_next_element [2023-11-21 19:56:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:56:32,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:56:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_int [2023-11-21 19:56:32,785 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_int [2023-11-21 19:56:32,786 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_iter_is_valid [2023-11-21 19:56:32,786 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_iter_is_valid [2023-11-21 19:56:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure aws_hash_table_is_valid [2023-11-21 19:56:32,787 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_hash_table_is_valid [2023-11-21 19:56:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:56:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure __CPROVER_overflow_mult [2023-11-21 19:56:32,787 INFO L138 BoogieDeclarations]: Found implementation of procedure __CPROVER_overflow_mult [2023-11-21 19:56:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure aws_add_size_checked [2023-11-21 19:56:32,787 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_add_size_checked [2023-11-21 19:56:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure s_remove_entry [2023-11-21 19:56:32,788 INFO L138 BoogieDeclarations]: Found implementation of procedure s_remove_entry [2023-11-21 19:56:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 19:56:32,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-21 19:56:32,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:56:33,220 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:56:33,224 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:56:33,507 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !true; [2023-11-21 19:56:33,507 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !true; [2023-11-21 19:56:34,796 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !true; [2023-11-21 19:56:34,847 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:56:35,308 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:56:35,313 INFO L308 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-21 19:56:35,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:56:35 BoogieIcfgContainer [2023-11-21 19:56:35,316 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:56:35,319 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:56:35,319 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:56:35,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:56:35,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:56:27" (1/3) ... [2023-11-21 19:56:35,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26270ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:56:35, skipping insertion in model container [2023-11-21 19:56:35,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:56:32" (2/3) ... [2023-11-21 19:56:35,327 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26270ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:56:35, skipping insertion in model container [2023-11-21 19:56:35,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:56:35" (3/3) ... [2023-11-21 19:56:35,332 INFO L112 eAbstractionObserver]: Analyzing ICFG aws_hash_table_foreach_harness.i [2023-11-21 19:56:35,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:56:35,353 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:56:35,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:56:35,436 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;@584253de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:56:35,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:56:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 229 states, 128 states have (on average 1.2265625) internal successors, (157), 125 states have internal predecessors, (157), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-21 19:56:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-21 19:56:35,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:56:35,463 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:56:35,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:56:35,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:56:35,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1031236578, now seen corresponding path program 1 times [2023-11-21 19:56:35,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:56:35,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724026040] [2023-11-21 19:56:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:35,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:56:35,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:56:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217216677] [2023-11-21 19:56:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:35,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:56:35,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:56:35,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:56:35,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:56:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:56:36,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 2316 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-21 19:56:36,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:56:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 19:56:36,725 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:56:36,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:56:36,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724026040] [2023-11-21 19:56:36,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:56:36,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217216677] [2023-11-21 19:56:36,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217216677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:56:36,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:56:36,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 19:56:36,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700862894] [2023-11-21 19:56:36,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:56:36,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 19:56:36,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:56:36,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 19:56:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 19:56:36,769 INFO L87 Difference]: Start difference. First operand has 229 states, 128 states have (on average 1.2265625) internal successors, (157), 125 states have internal predecessors, (157), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) Second operand has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-21 19:56:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:56:37,065 INFO L93 Difference]: Finished difference Result 405 states and 592 transitions. [2023-11-21 19:56:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 19:56:37,067 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 87 [2023-11-21 19:56:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:56:37,080 INFO L225 Difference]: With dead ends: 405 [2023-11-21 19:56:37,080 INFO L226 Difference]: Without dead ends: 227 [2023-11-21 19:56:37,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 19:56:37,090 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:56:37,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 267 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:56:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-21 19:56:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2023-11-21 19:56:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 124 states have internal predecessors, (146), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-21 19:56:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 307 transitions. [2023-11-21 19:56:37,160 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 307 transitions. Word has length 87 [2023-11-21 19:56:37,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:56:37,162 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 307 transitions. [2023-11-21 19:56:37,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.0) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-21 19:56:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 307 transitions. [2023-11-21 19:56:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-21 19:56:37,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:56:37,167 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:56:37,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:56:37,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 19:56:37,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:56:37,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:56:37,382 INFO L85 PathProgramCache]: Analyzing trace with hash -408096369, now seen corresponding path program 1 times [2023-11-21 19:56:37,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:56:37,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600051306] [2023-11-21 19:56:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:37,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:56:37,565 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:56:37,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130488205] [2023-11-21 19:56:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:37,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:56:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:56:37,567 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:56:37,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:56:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:56:38,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 2344 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:56:38,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:56:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 19:56:38,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:56:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-21 19:56:38,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:56:38,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600051306] [2023-11-21 19:56:38,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:56:38,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130488205] [2023-11-21 19:56:38,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130488205] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-21 19:56:38,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:56:38,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2023-11-21 19:56:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355466898] [2023-11-21 19:56:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:56:38,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 19:56:38,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:56:38,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 19:56:38,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-11-21 19:56:38,805 INFO L87 Difference]: Start difference. First operand 227 states and 307 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-21 19:56:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:56:39,720 INFO L93 Difference]: Finished difference Result 411 states and 571 transitions. [2023-11-21 19:56:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 19:56:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 92 [2023-11-21 19:56:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:56:39,727 INFO L225 Difference]: With dead ends: 411 [2023-11-21 19:56:39,727 INFO L226 Difference]: Without dead ends: 242 [2023-11-21 19:56:39,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-11-21 19:56:39,730 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 309 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:56:39,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 1182 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 19:56:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2023-11-21 19:56:39,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2023-11-21 19:56:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 131 states have (on average 1.1908396946564885) internal successors, (156), 133 states have internal predecessors, (156), 86 states have call successors, (86), 23 states have call predecessors, (86), 24 states have return successors, (92), 85 states have call predecessors, (92), 85 states have call successors, (92) [2023-11-21 19:56:39,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 334 transitions. [2023-11-21 19:56:39,773 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 334 transitions. Word has length 92 [2023-11-21 19:56:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:56:39,774 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 334 transitions. [2023-11-21 19:56:39,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2023-11-21 19:56:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 334 transitions. [2023-11-21 19:56:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-21 19:56:39,778 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:56:39,778 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:56:39,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:56:40,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:56:40,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:56:40,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:56:40,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1526776062, now seen corresponding path program 1 times [2023-11-21 19:56:40,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:56:40,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724031079] [2023-11-21 19:56:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:40,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:56:40,155 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 19:56:40,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057342413] [2023-11-21 19:56:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:40,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:56:40,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:56:40,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:56:40,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:56:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:56:40,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 2349 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 19:56:40,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:56:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-21 19:56:40,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:56:40,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:56:40,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724031079] [2023-11-21 19:56:40,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 19:56:40,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057342413] [2023-11-21 19:56:40,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057342413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:56:40,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:56:40,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:56:40,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168145067] [2023-11-21 19:56:40,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:56:40,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:56:40,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:56:40,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:56:40,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:56:40,888 INFO L87 Difference]: Start difference. First operand 242 states and 334 transitions. Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-21 19:56:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:56:41,378 INFO L93 Difference]: Finished difference Result 452 states and 630 transitions. [2023-11-21 19:56:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:56:41,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 93 [2023-11-21 19:56:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:56:41,381 INFO L225 Difference]: With dead ends: 452 [2023-11-21 19:56:41,382 INFO L226 Difference]: Without dead ends: 246 [2023-11-21 19:56:41,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:56:41,384 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 1 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:56:41,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1052 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 19:56:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-21 19:56:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2023-11-21 19:56:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 136 states have internal predecessors, (159), 86 states have call successors, (86), 23 states have call predecessors, (86), 25 states have return successors, (93), 86 states have call predecessors, (93), 85 states have call successors, (93) [2023-11-21 19:56:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 338 transitions. [2023-11-21 19:56:41,416 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 338 transitions. Word has length 93 [2023-11-21 19:56:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:56:41,417 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 338 transitions. [2023-11-21 19:56:41,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-21 19:56:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 338 transitions. [2023-11-21 19:56:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-21 19:56:41,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:56:41,419 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:56:41,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:56:41,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:56:41,633 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:56:41,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:56:41,633 INFO L85 PathProgramCache]: Analyzing trace with hash 14508625, now seen corresponding path program 1 times [2023-11-21 19:56:41,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:56:41,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953275934] [2023-11-21 19:56:41,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:41,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:56:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:56:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-21 19:56:44,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:56:44,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953275934] [2023-11-21 19:56:44,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953275934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:56:44,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143060845] [2023-11-21 19:56:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:56:44,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:56:44,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:56:44,049 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:56:44,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9afa639e-47d9-4511-b5fc-b0b4af27a656/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:56:44,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:56:44,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-21 19:56:44,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:56:44,887 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 22 treesize of output 1 [2023-11-21 19:56:45,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2023-11-21 19:56:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-21 19:56:45,608 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:56:45,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143060845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:56:45,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:56:45,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8] total 20 [2023-11-21 19:56:45,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892037504] [2023-11-21 19:56:45,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:56:45,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 19:56:45,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:56:45,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 19:56:45,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-11-21 19:56:45,611 INFO L87 Difference]: Start difference. First operand 246 states and 338 transitions. Second operand has 14 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 8 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-11-21 19:56:48,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:56:50,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:56:52,299 WARN L539 Checker$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] [2023-11-21 19:56:54,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:56:56,344 WARN L539 Checker$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] [2023-11-21 19:56:58,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:57:00,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:57:02,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:57:04,481 WARN L539 Checker$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] [2023-11-21 19:57:06,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:57:08,536 WARN L539 Checker$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] [2023-11-21 19:57:12,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:57:14,812 WARN L539 Checker$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] [2023-11-21 19:57:17,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:57:19,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:57:21,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Real, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-21 19:57:23,771 WARN L539 Checker$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]